On Fri, Oct 18, 2019 at 08:07:28PM -0700, Marc MERLIN wrote: > Ok, so before blowing the filesystem away after it was apparently badly > damaged by a suspend to disk, I tried check --repair and I hit an > infinite loop. > > Let me know if you'd like anything off the FS before I delete it.
I heard nothing back, so I deleted the FS and restored from backup. But now I'm scared of ever doing a suspend to disk again. Could someone please look at the logs and give me some idea of what happened, if at all possible? Non recoverable data corruption on my laptop when I travel and backups/restores are complicated, is a bit unnerving... Thanks, Marc > Thanks, > Marc > > enabling repair mode > repair mode will force to clear out log tree, are you sure? [y/N]: y > Checking filesystem on /dev/mapper/pool1 > UUID: fda628bc-1ca4-49c5-91c2-4260fe967a23 > checking extents > Backref 415334400 parent 36028797198598144 not referenced back 0x5648ef1870e0 > Backref 415334400 parent 179634176 root 179634176 not found in extent tree > Incorrect global backref count on 415334400 found 2 wanted 1 > backpointer mismatch on [415334400 16384] > repair deleting extent record: key 415334400 169 0 > adding new tree backref on start 415334400 len 16384 parent 179634176 root > 179634176 > Repaired extent references for 415334400 > ref mismatch on [101995261952 4096] extent item 36028797018963969, found 1 > repair deleting extent record: key 101995261952 168 4096 > adding new data backref on 101995261952 root 456 owner 74455677 offset > 64892928 found 1 > Repaired extent references for 101995261952 > Incorrect local backref count on 458640384000 root 456 owner 81409181 offset > 17039360 found 0 wanted 1 back 0x5648eefd3d10 > Backref disk bytenr does not match extent record, bytenr=458640384000, ref > bytenr=0 > Backref 458640384000 root 456 owner 73020573 offset 17039360 num_refs 0 not > found in extent tree > Incorrect local backref count on 458640384000 root 456 owner 73020573 offset > 17039360 found 1 wanted 0 back 0x5648b32a9600 > backpointer mismatch on [458640384000 86016] > repair deleting extent record: key 458640384000 168 86016 > adding new data backref on 458640384000 parent 438017720320 owner 0 offset 0 > found 1 > adding new data backref on 458640384000 root 456 owner 73020573 offset > 17039360 found 1 > Repaired extent references for 458640384000 > Fixed 0 roots. > checking free space cache > cache and super generation don't match, space cache will be invalidated > checking fs roots > Deleting bad dir index [10138517,96,436945] root 456 > Deleting bad dir index [10138518,96,646273] root 456 > Deleting bad dir index [10138517,96,437016] root 456 > Deleting bad dir index [10138518,96,808999] root 456 > Deleting bad dir index [10215134,96,149427] root 456 > Deleting bad dir index [10240541,96,268037] root 456 > Deleting bad dir index [10138517,96,540247] root 456 > Deleting bad dir index [10138518,96,825234] root 456 > Deleting bad dir index [10138517,96,736673] root 456 > Deleting bad dir index [10138518,96,1118221] root 456 > Deleting bad dir index [10240541,96,439703] root 456 > Deleting bad dir index [10138517,96,752282] root 456 > root 456 inode 75431563 errors 100, file extent discount > Found file extent holes: > start: 4096, len: 4096 > root 456 inode 75431568 errors 100, file extent discount > Found file extent holes: > start: 0, len: 1638400 > root 456 inode 75431583 errors 100, file extent discount > Found file extent holes: > start: 0, len: 147456 > root 456 inode 75431585 errors 100, file extent discount > Found file extent holes: > start: 0, len: 208896 > root 456 inode 75431591 errors 100, file extent discount > Found file extent holes: > start: 0, len: 2523136 > root 456 inode 75431730 errors 100, file extent discount > Found file extent holes: > start: 0, len: 208896 > root 456 inode 75431744 errors 100, file extent discount > Found file extent holes: > start: 0, len: 2084864 > root 456 inode 75431751 errors 100, file extent discount > Found file extent holes: > start: 0, len: 172032 > root 456 inode 75431756 errors 100, file extent discount > Found file extent holes: > start: 0, len: 8192 > root 456 inode 75431760 errors 100, file extent discount > Found file extent holes: > start: 0, len: 12288 > root 456 inode 75431765 errors 100, file extent discount > Found file extent holes: > start: 0, len: 32768 > root 456 inode 75431773 errors 100, file extent discount > Found file extent holes: > start: 0, len: 90112 > Fixed discount file extents for inode: 75432421 in root: 456 > Fixed discount file extents for inode: 75432429 in root: 456 > root 456 inode 75432429 errors 100, file extent discount > Found file extent holes: > start: 0, len: 4096 > Fixed discount file extents for inode: 75432430 in root: 456 > Fixed discount file extents for inode: 75432432 in root: 456 > Fixed discount file extents for inode: 75432433 in root: 456 > root 456 inode 75432433 errors 100, file extent discount > Found file extent holes: > start: 0, len: 4096 > root 456 inode 75432434 errors 100, file extent discount > Found file extent holes: > start: 0, len: 724992 > Fixed discount file extents for inode: 75432436 in root: 456 > Fixed discount file extents for inode: 75432437 in root: 456 > root 456 inode 75432437 errors 100, file extent discount > Found file extent holes: > start: 0, len: 4096 > Fixed discount file extents for inode: 75432438 in root: 456 > Fixed discount file extents for inode: 75432441 in root: 456 > root 456 inode 75432441 errors 100, file extent discount > Found file extent holes: > start: 0, len: 4096 > Fixed discount file extents for inode: 75432444 in root: 456 > root 456 inode 75432444 errors 100, file extent discount > Found file extent holes: > start: 0, len: 4096 > Fixed discount file extents for inode: 75432445 in root: 456 > Fixed discount file extents for inode: 75432447 in root: 456 > Fixed discount file extents for inode: 75432448 in root: 456 > Fixed discount file extents for inode: 75432454 in root: 456 > Fixed discount file extents for inode: 75432457 in root: 456 > root 456 inode 75432457 errors 100, file extent discount > Found file extent holes: > start: 0, len: 4096 > root 456 inode 75432471 errors 100, file extent discount > Found file extent holes: > start: 0, len: 20480 > Fixed discount file extents for inode: 75432473 in root: 456 > root 456 inode 75432473 errors 100, file extent discount > Found file extent holes: > start: 0, len: 20480 > Fixed discount file extents for inode: 75432482 in root: 456 > Fixed discount file extents for inode: 75432483 in root: 456 > Fixed discount file extents for inode: 75432484 in root: 456 > Fixed discount file extents for inode: 75432487 in root: 456 > Fixed discount file extents for inode: 75432489 in root: 456 > Fixed discount file extents for inode: 75432494 in root: 456 > Fixed discount file extents for inode: 75432611 in root: 456 > Fixed discount file extents for inode: 75432622 in root: 456 > Fixed discount file extents for inode: 75432626 in root: 456 > Fixed discount file extents for inode: 75432628 in root: 456 > Fixed discount file extents for inode: 75432636 in root: 456 > Fixed discount file extents for inode: 75432637 in root: 456 > root 456 inode 75432637 errors 100, file extent discount > Found file extent holes: > start: 0, len: 4096 > Fixed discount file extents for inode: 75432643 in root: 456 > root 456 inode 75432643 errors 100, file extent discount > Found file extent holes: > start: 0, len: 135168 > Fixed discount file extents for inode: 75432650 in root: 456 > root 456 inode 75432650 errors 100, file extent discount > Found file extent holes: > start: 0, len: 4096 > Fixed discount file extents for inode: 75432656 in root: 456 > root 456 inode 75432656 errors 100, file extent discount > Found file extent holes: > start: 0, len: 4096 > Fixed discount file extents for inode: 75432657 in root: 456 > root 456 inode 75432657 errors 100, file extent discount > Found file extent holes: > start: 0, len: 4096 > Fixed discount file extents for inode: 75432659 in root: 456 > Fixed discount file extents for inode: 75432662 in root: 456 > root 456 inode 75432662 errors 100, file extent discount > Found file extent holes: > start: 0, len: 8192 > Fixed discount file extents for inode: 75432663 in root: 456 > root 456 inode 75432663 errors 100, file extent discount > Found file extent holes: > start: 0, len: 8192 > Fixed discount file extents for inode: 75432664 in root: 456 > root 456 inode 75432664 errors 100, file extent discount > Found file extent holes: > start: 0, len: 8192 > Fixed discount file extents for inode: 75432674 in root: 456 > root 456 inode 75432674 errors 100, file extent discount > Found file extent holes: > start: 0, len: 8192 > Fixed discount file extents for inode: 75432692 in root: 456 > root 456 inode 75432692 errors 100, file extent discount > Found file extent holes: > start: 0, len: 4096 > Fixed discount file extents for inode: 75432708 in root: 456 > Fixed discount file extents for inode: 75432709 in root: 456 > root 456 inode 75432709 errors 100, file extent discount > Found file extent holes: > start: 0, len: 4096 > Fixed discount file extents for inode: 75432712 in root: 456 > Fixed discount file extents for inode: 75432717 in root: 456 > Fixed discount file extents for inode: 75432720 in root: 456 > Fixed discount file extents for inode: 75432725 in root: 456 > Fixed discount file extents for inode: 75432731 in root: 456 > Fixed discount file extents for inode: 75432732 in root: 456 > Fixed discount file extents for inode: 75432749 in root: 456 > Fixed discount file extents for inode: 75432762 in root: 456 > Fixed discount file extents for inode: 75432765 in root: 456 > Fixed discount file extents for inode: 75432783 in root: 456 > Fixed discount file extents for inode: 75432784 in root: 456 > Fixed discount file extents for inode: 75432785 in root: 456 > root 456 inode 75432785 errors 100, file extent discount > Found file extent holes: > start: 0, len: 8192 > Fixed discount file extents for inode: 75432786 in root: 456 > root 456 inode 75432786 errors 100, file extent discount > Found file extent holes: > start: 0, len: 8192 > Fixed discount file extents for inode: 75432796 in root: 456 > root 456 inode 75432796 errors 100, file extent discount > Found file extent holes: > start: 0, len: 8192 > Fixed discount file extents for inode: 75432799 in root: 456 > root 456 inode 75432799 errors 100, file extent discount > Found file extent holes: > start: 0, len: 8192 > Fixed discount file extents for inode: 75432801 in root: 456 > root 456 inode 75432801 errors 100, file extent discount > Found file extent holes: > start: 0, len: 4096 > Fixed discount file extents for inode: 75432807 in root: 456 > Fixed discount file extents for inode: 75432817 in root: 456 > Fixed discount file extents for inode: 75432829 in root: 456 > Fixed discount file extents for inode: 75432860 in root: 456 > root 456 inode 75432860 errors 100, file extent discount > Found file extent holes: > start: 0, len: 4096 > Fixed discount file extents for inode: 75432862 in root: 456 > Fixed discount file extents for inode: 75432863 in root: 456 > Fixed discount file extents for inode: 75432869 in root: 456 > Fixed discount file extents for inode: 75432870 in root: 456 > Fixed discount file extents for inode: 75432871 in root: 456 > Fixed discount file extents for inode: 75432872 in root: 456 > Fixed discount file extents for inode: 75432875 in root: 456 > Fixed discount file extents for inode: 75432877 in root: 456 > Fixed discount file extents for inode: 75432882 in root: 456 > Fixed discount file extents for inode: 75432883 in root: 456 > Fixed discount file extents for inode: 75432893 in root: 456 > Fixed discount file extents for inode: 75432894 in root: 456 > Fixed discount file extents for inode: 75432897 in root: 456 > Fixed discount file extents for inode: 75432899 in root: 456 > Fixed discount file extents for inode: 75432900 in root: 456 > Fixed discount file extents for inode: 75432905 in root: 456 > Fixed discount file extents for inode: 75432906 in root: 456 > Fixed discount file extents for inode: 75432916 in root: 456 > Fixed discount file extents for inode: 75432917 in root: 456 > Fixed discount file extents for inode: 75432919 in root: 456 > Fixed discount file extents for inode: 75432920 in root: 456 > Fixed discount file extents for inode: 75432923 in root: 456 > Fixed discount file extents for inode: 75432942 in root: 456 > Fixed discount file extents for inode: 75432944 in root: 456 > Fixed discount file extents for inode: 75432948 in root: 456 > root 456 inode 75432948 errors 100, file extent discount > Found file extent holes: > start: 0, len: 8192 > Fixed discount file extents for inode: 75432949 in root: 456 > root 456 inode 75432949 errors 100, file extent discount > Found file extent holes: > start: 0, len: 8192 > and it loops forever on 456 > > On Thu, Oct 17, 2019 at 07:56:04PM -0700, Marc MERLIN wrote: > > This happened almost after a resume from suspend to disk. > > First corruption and read only I got a very long time. > > > > Could they be related? > > > > [26062.126505] ------------[ cut here ]------------ > > [26062.126524] WARNING: CPU: 7 PID: 12394 at fs/btrfs/extent-tree.c:7100 > > __btrfs_free_extent+0x18b/0x921 > > [26062.126526] Modules linked in: msr ccm ipt_MASQUERADE ipt_REJECT > > nf_reject_ipv4 xt_tcpudp xt_conntrack nf_log_ipv4 nf_log_common xt_LOG > > iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 > > iptable_mangle ebtable_filter ebtables ip6table_filter ip6_tables > > iptable_filter ip_tables x_tables bpfilter rfcomm ax25 bnep pci_stub > > vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) autofs4 binfmt_misc > > uinput nfsd auth_rpcgss nfs_acl nfs lockd grace fscache sunrpc nls_utf8 > > nls_cp437 vfat fat cuse ecryptfs bbswitch(OE) configs input_polldev loop > > firewire_sbp2 firewire_core crc_itu_t ppdev parport_pc lp parport uvcvideo > > videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common videodev > > media btusb btrtl btbcm btintel bluetooth ecdh_generic hid_generic usbhid > > hid joydev arc4 coretemp x86_pkg_temp_thermal intel_powerclamp kvm_intel > > kvm irqbypass snd_hda_codec_realtek snd_hda_codec_generic > > intel_wmi_thunderbolt iTCO_wdt wmi_bmof mei_hdcp iTCO_vendor_support > > rtsx_pci_sdmmc snd_hda_intel > > [26062.126561] snd_hda_codec iwlmvm crct10dif_pclmul snd_hda_core > > crc32_pclmul mac80211 snd_hwdep thinkpad_acpi snd_pcm ghash_clmulni_intel > > nvram ledtrig_audio intel_cstate deflate snd_seq efi_pstore iwlwifi > > snd_seq_device snd_timer intel_rapl_perf psmouse pcspkr efivars wmi hwmon > > snd ac battery cfg80211 mei_me soundcore xhci_pci xhci_hcd rtsx_pci > > i2c_i801 rfkill sg nvidiafb intel_pch_thermal usbcore vgastate fb_ddc > > pcc_cpufreq sata_sil24 r8169 libphy mii fuse fan raid456 multipath > > mmc_block mmc_core dm_snapshot dm_bufio dm_mirror dm_region_hash dm_log > > dm_crypt dm_mod async_raid6_recov async_pq async_xor async_memcpy async_tx > > blowfish_x86_64 blowfish_common crc32c_intel bcache crc64 aesni_intel > > input_leds i915 aes_x86_64 crypto_simd cryptd ptp glue_helper serio_raw > > pps_core thermal evdev [last unloaded: e1000e] > > [26062.126597] CPU: 7 PID: 12394 Comm: btrfs-transacti Tainted: G W > > OE 5.1.21-amd64-preempt-sysrq-20190816 #5 > > [26062.126599] Hardware name: LENOVO 20ERCTO1WW/20ERCTO1WW, BIOS N1DET95W > > (2.21 ) 12/13/2017 > > [26062.126604] RIP: 0010:__btrfs_free_extent+0x18b/0x921 > > [26062.126606] Code: 00 8b 45 40 44 29 e0 83 f8 05 0f 8f 2e 05 00 00 41 ff > > cc eb a5 83 f8 fe 0f 85 29 07 00 00 48 c7 c7 f8 67 f0 89 e8 f6 cb dd ff > > <0f> 0b 48 8b 7d 00 e8 e5 54 00 00 4c 89 fa 48 c7 c6 85 e0 f4 89 41 > > [26062.126608] RSP: 0018:ffffb2d9c46e7c88 EFLAGS: 00010246 > > [26062.126611] RAX: 0000000000000024 RBX: ffff9abca20884e0 RCX: > > 0000000000000000 > > [26062.126613] RDX: 0000000000000000 RSI: ffff9abccf5d6558 RDI: > > ffff9abccf5d6558 > > [26062.126617] RBP: ffff9ab5a4545460 R08: 0000000000000001 R09: > > ffffffff8a80c7af > > [26062.126618] R10: 0000000000000002 R11: ffffb2d9c46e7b2f R12: > > 0000000000000169 > > [26062.126622] R13: 00000000fffffffe R14: 0000000001040000 R15: > > 0000006ac918e000 > > [26062.126625] FS: 0000000000000000(0000) GS:ffff9abccf5c0000(0000) > > knlGS:0000000000000000 > > [26062.126627] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > [26062.126629] CR2: 0000199a9fb4d000 CR3: 000000016c20e006 CR4: > > 00000000003606e0 > > [26062.126633] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > > 0000000000000000 > > [26062.126634] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: > > 0000000000000400 > > [26062.126636] Call Trace: > > [26062.126647] __btrfs_run_delayed_refs+0x750/0xc36 > > [26062.126653] ? __switch_to_asm+0x41/0x70 > > [26062.126655] ? __switch_to_asm+0x35/0x70 > > [26062.126658] ? __switch_to_asm+0x41/0x70 > > [26062.126662] ? __switch_to+0x13d/0x3d5 > > [26062.126668] btrfs_run_delayed_refs+0x5d/0x132 > > [26062.126672] btrfs_commit_transaction+0x55/0x7c8 > > [26062.126676] ? start_transaction+0x347/0x3cb > > [26062.126679] transaction_kthread+0xc9/0x135 > > [26062.126683] ? btrfs_cleanup_transaction+0x403/0x403 > > [26062.126688] kthread+0xeb/0xf0 > > [26062.126692] ? kthread_create_worker_on_cpu+0x65/0x65 > > [26062.126695] ret_from_fork+0x35/0x40 > > [26062.126698] ---[ end trace 4c1a6b3749a2f650 ]--- > > [26062.126703] BTRFS info (device dm-2): leaf 510067163136 gen 2427077 > > total ptrs 130 free space 4329 owner 2 > > [26062.126706] item 0 key (458630676480 168 65536) itemoff 16217 > > itemsize 66 > > [26062.126708] extent refs 2 gen 2369265 flags 1 > > [26062.126709] ref#0: extent data backref root 456 objectid > > 72925787 offset 5472256 count 1 > > [26062.126711] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.126714] item 1 key (458630856704 168 69632) itemoff 16151 > > itemsize 66 > > [26062.126715] extent refs 2 gen 2369025 flags 1 > > [26062.126716] ref#0: extent data backref root 456 objectid > > 72925787 offset 4796416 count 1 > > [26062.126718] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.126720] item 2 key (458631012352 168 16384) itemoff 15968 > > itemsize 183 > > [26062.126722] extent refs 11 gen 1800715 flags 1 > > [26062.126722] ref#0: extent data backref root 456 objectid > > 56413614 offset 63946752 count 1 > > [26062.126724] ref#1: shared data backref parent 508153839616 > > count 1 > > [26062.126726] ref#2: shared data backref parent 493541244928 > > count 1 > > [26062.126727] ref#3: shared data backref parent 492677332992 > > count 1 > > [26062.126728] ref#4: shared data backref parent 492328566784 > > count 1 > > [26062.126730] ref#5: shared data backref parent 492245188608 > > count 1 > > [26062.126731] ref#6: shared data backref parent 475885109248 > > count 1 > > [26062.126732] ref#7: shared data backref parent 471036608512 > > count 1 > > [26062.126733] ref#8: shared data backref parent 436114243584 > > count 1 > > [26062.126735] ref#9: shared data backref parent 886718464 > > count 1 > > [26062.126736] ref#10: shared data backref parent 90259456 > > count 1 > > [26062.126738] item 3 key (458631028736 168 524288) itemoff 15902 > > itemsize 66 > > [26062.126740] extent refs 2 gen 2420471 flags 1 > > [26062.126741] ref#0: extent data backref root 456 objectid > > 75167213 offset 2097152 count 1 > > [26062.126743] ref#1: shared data backref parent 41020112896 > > count 1 > > [26062.126745] item 4 key (458631553024 168 69632) itemoff 15849 > > itemsize 53 > > [26062.126746] extent refs 1 gen 2422941 flags 1 > > [26062.126747] ref#0: extent data backref root 456 objectid > > 75259665 offset 0 count 1 > > [26062.126749] item 5 key (458632052736 168 2269184) itemoff 15796 > > itemsize 53 > > [26062.126750] extent refs 1 gen 1444854 flags 1 > > [26062.126751] ref#0: extent data backref root 456 objectid > > 50397136 offset 0 count 1 > > [26062.126753] item 6 key (458634321920 168 311296) itemoff 15759 > > itemsize 37 > > [26062.126754] extent refs 1 gen 1444854 flags 1 > > [26062.126755] ref#0: shared data backref parent 214892544 > > count 1 > > [26062.126757] item 7 key (458635517952 168 1032192) itemoff 15722 > > itemsize 37 > > [26062.126758] extent refs 1 gen 1444854 flags 1 > > [26062.126759] ref#0: shared data backref parent 102547456 > > count 1 > > [26062.126761] item 8 key (458636550144 168 438272) itemoff 15656 > > itemsize 66 > > [26062.126762] extent refs 2 gen 2422644 flags 1 > > [26062.126763] ref#0: extent data backref root 456 objectid > > 75244720 offset 0 count 1 > > [26062.126765] ref#1: shared data backref parent 470658482176 > > count 1 > > [26062.126768] item 9 key (458637037568 168 73728) itemoff 15590 > > itemsize 66 > > [26062.126769] extent refs 2 gen 2369217 flags 1 > > [26062.126770] ref#0: extent data backref root 456 objectid > > 72925787 offset 5332992 count 1 > > [26062.126772] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.126774] item 10 key (458637152256 168 73728) itemoff 15524 > > itemsize 66 > > [26062.126775] extent refs 2 gen 2369242 flags 1 > > [26062.126776] ref#0: extent data backref root 456 objectid > > 72925787 offset 5402624 count 1 > > [26062.126778] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.126780] item 11 key (458637328384 168 45056) itemoff 15471 > > itemsize 53 > > [26062.126781] extent refs 1 gen 2369305 flags 1 > > [26062.126782] ref#0: extent data backref root 456 objectid > > 73017376 offset 131072 count 1 > > [26062.126784] item 12 key (458637885440 168 69632) itemoff 15405 > > itemsize 66 > > [26062.126786] extent refs 2 gen 2369052 flags 1 > > [26062.126787] ref#0: extent data backref root 456 objectid > > 72925787 offset 4861952 count 1 > > [26062.126788] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.126790] item 13 key (458638147584 168 69632) itemoff 15352 > > itemsize 53 > > [26062.126792] extent refs 1 gen 2369305 flags 1 > > [26062.126793] ref#0: extent data backref root 456 objectid > > 73017334 offset 131072 count 1 > > [26062.126795] item 14 key (458638561280 168 73728) itemoff 15286 > > itemsize 66 > > [26062.126796] extent refs 2 gen 2368754 flags 1 > > [26062.126797] ref#0: extent data backref root 456 objectid > > 72925787 offset 4063232 count 1 > > [26062.126799] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.126801] item 15 key (458638970880 168 90112) itemoff 15103 > > itemsize 183 > > [26062.126802] extent refs 11 gen 1800682 flags 1 > > [26062.126803] ref#0: extent data backref root 456 objectid > > 56413614 offset 40665088 count 1 > > [26062.126805] ref#1: shared data backref parent 508153069568 > > count 1 > > [26062.126806] ref#2: shared data backref parent 508031270912 > > count 1 > > [26062.126808] ref#3: shared data backref parent 493564215296 > > count 1 > > [26062.126809] ref#4: shared data backref parent 493540098048 > > count 1 > > [26062.126811] ref#5: shared data backref parent 492676038656 > > count 1 > > [26062.126813] ref#6: shared data backref parent 475884142592 > > count 1 > > [26062.126814] ref#7: shared data backref parent 471032840192 > > count 1 > > [26062.126816] ref#8: shared data backref parent 436112146432 > > count 1 > > [26062.126817] ref#9: shared data backref parent 883752960 > > count 1 > > [26062.126818] ref#10: shared data backref parent 86654976 > > count 1 > > [26062.126820] item 16 key (458639060992 168 86016) itemoff 15053 > > itemsize 50 > > [26062.126822] extent refs 2 gen 2369347 flags 1 > > [26062.126823] ref#0: shared data backref parent 492981370880 > > count 1 > > [26062.126824] ref#1: shared data backref parent 438017720320 > > count 1 > > [26062.126826] item 17 key (458639147008 168 86016) itemoff 15003 > > itemsize 50 > > [26062.126827] extent refs 2 gen 2369347 flags 1 > > [26062.126828] ref#0: shared data backref parent 492981370880 > > count 1 > > [26062.126830] ref#1: shared data backref parent 438017720320 > > count 1 > > [26062.126832] item 18 key (458639233024 168 90112) itemoff 14953 > > itemsize 50 > > [26062.126833] extent refs 2 gen 2369347 flags 1 > > [26062.126834] ref#0: shared data backref parent 492981370880 > > count 1 > > [26062.126836] ref#1: shared data backref parent 438017720320 > > count 1 > > [26062.126839] item 19 key (458639323136 168 81920) itemoff 14916 > > itemsize 37 > > [26062.126840] extent refs 1 gen 2369352 flags 1 > > [26062.126841] ref#0: shared data backref parent 510058790912 > > count 1 > > [26062.126843] item 20 key (458639405056 168 77824) 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(458639761408 168 81920) itemoff 14692 > > itemsize 50 > > [26062.126865] extent refs 2 gen 2369347 flags 1 > > [26062.126866] ref#0: shared data backref parent 492981370880 > > count 1 > > [26062.126868] ref#1: shared data backref parent 438017720320 > > count 1 > > [26062.126870] item 25 key (458640027648 168 90112) itemoff 14642 > > itemsize 50 > > [26062.126871] extent refs 2 gen 2369347 flags 1 > > [26062.126873] ref#0: shared data backref parent 492981370880 > > count 1 > > [26062.126874] ref#1: shared data backref parent 438017720320 > > count 1 > > [26062.126876] item 26 key (458640117760 168 90112) itemoff 14592 > > itemsize 50 > > [26062.126877] extent refs 2 gen 2369347 flags 1 > > [26062.126878] ref#0: shared data backref parent 492981370880 > > count 1 > > [26062.126880] ref#1: shared data backref parent 438017720320 > > count 1 > > [26062.126882] item 27 key (458640207872 168 86016) itemoff 14542 > > itemsize 50 > > [26062.126883] extent refs 2 gen 2369347 flags 1 > > [26062.126884] ref#0: shared data backref parent 492981370880 > > count 1 > > [26062.126885] ref#1: shared data backref parent 438017720320 > > count 1 > > [26062.126888] item 28 key (458640293888 168 90112) itemoff 14492 > > itemsize 50 > > [26062.126889] extent refs 2 gen 2369347 flags 1 > > [26062.126890] ref#0: shared data backref parent 492981370880 > > count 1 > > [26062.126891] ref#1: shared data backref parent 438017720320 > > count 1 > > [26062.126893] item 29 key (458640384000 168 86016) itemoff 14413 > > itemsize 79 > > [26062.126894] extent refs 3 gen 2369347 flags 1 > > [26062.126895] ref#0: extent data backref root 456 objectid > > 81409181 offset 17039360 count 1 > > [26062.126897] ref#1: shared data backref parent 492981370880 > > count 1 > > [26062.126898] ref#2: shared data backref parent 438017720320 > > count 1 > > [26062.126900] item 30 key (458640470016 168 86016) itemoff 14347 > > itemsize 66 > > [26062.126902] extent refs 2 gen 2369347 flags 1 > > [26062.126903] ref#0: extent data backref root 456 objectid > > 73020573 offset 17170432 count 1 > > [26062.126904] ref#1: shared data backref parent 438017720320 > > count 1 > > [26062.126906] item 31 key (458640556032 168 77824) itemoff 14310 > > itemsize 37 > > [26062.126907] extent refs 1 gen 2369352 flags 1 > > [26062.126908] ref#0: shared data backref parent 510058790912 > > count 1 > > [26062.126910] item 32 key (458640756736 168 24576) itemoff 14231 > > itemsize 79 > > [26062.126912] extent refs 6 gen 1800750 flags 1 > > [26062.126913] ref#0: extent data backref root 456 objectid > > 56413614 offset 697655296 count 2 > > [26062.126915] ref#1: shared data backref parent 509782933504 > > count 2 > > [26062.126917] ref#2: shared data backref parent 508543795200 > > count 2 > > [26062.126919] item 33 key (458641227776 168 73728) itemoff 14165 > > itemsize 66 > > [26062.126920] extent refs 2 gen 2369075 flags 1 > > [26062.126921] ref#0: extent data backref root 456 objectid > > 72925787 offset 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456 objectid > > 75167213 offset 3145728 count 1 > > [26062.126943] ref#1: shared data backref parent 41020112896 > > count 1 > > [26062.126945] item 37 key (458642747392 168 8192) itemoff 13875 > > itemsize 79 > > [26062.126946] extent refs 3 gen 1800733 flags 1 > > [26062.126947] ref#0: extent data backref root 456 objectid > > 56413614 offset 668401664 count 1 > > [26062.126949] ref#1: shared data backref parent 509783719936 > > count 1 > > [26062.126950] ref#2: shared data backref parent 509351231488 > > count 1 > > [26062.126953] item 38 key (458642841600 168 524288) itemoff 13809 > > itemsize 66 > > [26062.126954] extent refs 2 gen 2420502 flags 1 > > [26062.126955] ref#0: extent data backref root 456 objectid > > 75168659 offset 524288 count 1 > > [26062.126957] ref#1: shared data backref parent 492274728960 > > count 1 > > [26062.126959] item 39 key (458643431424 168 524288) itemoff 13743 > > itemsize 66 > > [26062.126961] extent refs 2 gen 2420478 flags 1 > > [26062.126962] ref#0: extent data backref root 456 objectid > > 75167502 offset 524288 count 1 > > [26062.126964] ref#1: shared data backref parent 41020112896 > > count 1 > > [26062.126966] item 40 key (458644230144 168 331776) itemoff 13706 > > itemsize 37 > > [26062.126967] extent refs 1 gen 1444854 flags 1 > > [26062.126968] ref#0: shared data backref parent 214908928 > > count 1 > > [26062.126970] item 41 key (458644561920 168 1671168) itemoff 13653 > > itemsize 53 > > [26062.126971] extent refs 1 gen 2376479 flags 1 > > [26062.126972] ref#0: extent data backref root 456 objectid > > 73223285 offset 0 count 1 > > [26062.126975] item 42 key (458646454272 168 2121728) itemoff 13600 > > itemsize 53 > > [26062.126976] extent refs 1 gen 1444854 flags 1 > > [26062.126977] ref#0: extent data backref root 456 objectid > > 50397133 offset 0 count 1 > > [26062.126979] item 43 key (458648576000 168 1605632) itemoff 13563 > > itemsize 37 > > [26062.126981] extent refs 1 gen 1444854 flags 1 > > [26062.126982] ref#0: shared data backref parent 93732864 > > count 1 > > [26062.126984] item 44 key (458650181632 168 1474560) itemoff 13526 > > itemsize 37 > > [26062.126985] extent refs 1 gen 1444854 flags 1 > > [26062.126986] ref#0: shared data backref parent 93732864 > > count 1 > > [26062.126988] item 45 key (458651656192 168 2125824) itemoff 13489 > > itemsize 37 > > [26062.126990] extent refs 1 gen 1444854 flags 1 > > [26062.126991] ref#0: shared data backref parent 93732864 > > count 1 > > [26062.126993] item 46 key (458653782016 168 356352) itemoff 13452 > > itemsize 37 > > [26062.126994] extent refs 1 gen 1444854 flags 1 > > [26062.126995] ref#0: shared data backref parent 214908928 > > count 1 > > [26062.126997] item 47 key (458655539200 168 524288) itemoff 13360 > > itemsize 92 > > [26062.126998] extent refs 4 gen 2419085 flags 1 > > [26062.126999] ref#0: extent data backref root 456 objectid > > 75099153 offset 2621440 count 1 > > [26062.127001] ref#1: shared data backref parent 494075035648 > > count 1 > > [26062.127002] ref#2: shared data backref parent 470850240512 > > count 1 > > [26062.127004] ref#3: shared data backref parent 437034745856 > > count 1 > > [26062.127006] item 48 key (458656153600 168 8192) itemoff 13281 > > itemsize 79 > > [26062.127008] extent refs 3 gen 1800733 flags 1 > > [26062.127009] ref#0: extent data backref root 456 objectid > > 56413614 offset 668811264 count 1 > > [26062.127011] ref#1: shared data backref parent 509783719936 > > count 1 > > [26062.127013] ref#2: shared data backref parent 509351231488 > > count 1 > > [26062.127015] item 49 key (458656161792 168 69632) itemoff 13215 > > itemsize 66 > > [26062.127016] extent refs 2 gen 2368859 flags 1 > > [26062.127017] ref#0: extent data backref root 456 objectid > > 72925787 offset 4325376 count 1 > > [26062.127019] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.127021] item 50 key (458657443840 168 1847296) itemoff 13162 > > itemsize 53 > > [26062.127023] extent refs 1 gen 2376479 flags 1 > > [26062.127024] ref#0: extent data backref root 456 objectid > > 73223286 offset 0 count 1 > > [26062.127026] item 51 key (458659307520 168 98304) itemoff 12979 > > itemsize 183 > > [26062.127028] extent refs 11 gen 1800674 flags 1 > > [26062.127029] ref#0: extent data backref root 456 objectid > > 56413614 offset 41541632 count 1 > > [26062.127031] ref#1: shared data backref parent 508153118720 > > count 1 > > [26062.127032] ref#2: shared data backref parent 508031533056 > > count 1 > > [26062.127034] ref#3: shared data backref parent 493564477440 > > count 1 > > [26062.127036] ref#4: shared data backref parent 493540179968 > > count 1 > > [26062.127038] ref#5: shared data backref parent 492675366912 > > count 1 > > [26062.127039] ref#6: shared data backref parent 475132116992 > > count 1 > > [26062.127041] ref#7: shared data backref parent 471032922112 > > count 1 > > [26062.127042] ref#8: shared data backref parent 436112244736 > > count 1 > > [26062.127044] ref#9: shared data backref parent 883998720 > > count 1 > > [26062.127046] ref#10: shared data backref parent 87015424 > > count 1 > > [26062.127048] item 52 key (458659405824 168 1753088) itemoff 12942 > > itemsize 37 > > [26062.127050] extent refs 1 gen 2408131 flags 1 > > [26062.127052] ref#0: shared data backref parent 509278633984 > > count 1 > > [26062.127055] item 53 key (458661167104 168 24576) itemoff 12759 > > itemsize 183 > > [26062.127056] extent refs 11 gen 1800715 flags 1 > > [26062.127058] ref#0: extent data backref root 456 objectid > > 56413614 offset 36765696 count 1 > > [26062.127059] ref#1: shared data backref parent 508152889344 > > count 1 > > [26062.127061] ref#2: shared data backref parent 508031139840 > > count 1 > > [26062.127062] ref#3: shared data backref parent 493563478016 > > count 1 > > [26062.127065] ref#4: shared data backref parent 493539983360 > > count 1 > > [26062.127066] ref#5: shared data backref parent 492674990080 > > count 1 > > [26062.127068] ref#6: shared data backref parent 475132166144 > > count 1 > > [26062.127070] ref#7: shared data backref parent 471032348672 > > count 1 > > [26062.127071] ref#8: shared data backref parent 436111769600 > > count 1 > > [26062.127073] ref#9: shared data backref parent 883359744 > > count 1 > > [26062.127074] ref#10: shared data backref parent 85082112 > > count 1 > > [26062.127077] item 54 key (458661191680 168 524288) itemoff 12667 > > itemsize 92 > > [26062.127078] extent refs 4 gen 2419085 flags 1 > > [26062.127079] ref#0: extent data backref root 456 objectid > > 75099153 offset 3145728 count 1 > > [26062.127085] ref#1: shared data backref parent 494075035648 > > count 1 > > [26062.127088] ref#2: shared data backref parent 470850240512 > > count 1 > > [26062.127089] ref#3: shared data backref parent 437034745856 > > count 1 > > [26062.127093] item 55 key (458662014976 168 524288) itemoff 12601 > > itemsize 66 > > [26062.127095] extent refs 2 gen 2421893 flags 1 > > [26062.127096] ref#0: extent data backref root 456 objectid > > 75220094 offset 1048576 count 1 > > [26062.127099] ref#1: shared data backref parent 493703069696 > > count 1 > > [26062.127102] item 56 key (458663206912 168 786432) itemoff 12548 > > itemsize 53 > > [26062.127104] extent refs 1 gen 1444854 flags 1 > > [26062.127105] ref#0: extent data backref root 456 objectid > > 50397303 offset 0 count 1 > > [26062.127109] item 57 key (458664165376 168 77824) itemoff 12482 > > itemsize 66 > > [26062.127111] extent refs 2 gen 2368700 flags 1 > > [26062.127112] ref#0: extent data backref root 456 objectid > > 72993362 offset 262144 count 1 > > [26062.127114] ref#1: shared data backref parent 494105804800 > > count 1 > > [26062.127118] item 58 key (458664243200 168 1159168) itemoff 12445 > > itemsize 37 > > [26062.127120] extent refs 1 gen 1444854 flags 1 > > [26062.127121] ref#0: shared data backref parent 93732864 > > count 1 > > [26062.127125] item 59 key (458665431040 168 753664) itemoff 12408 > > itemsize 37 > > [26062.127127] extent refs 1 gen 1444854 flags 1 > > [26062.127128] ref#0: shared data backref parent 214433792 > > count 1 > > [26062.127131] item 60 key (458666274816 168 393216) itemoff 12371 > > itemsize 37 > > [26062.127132] extent refs 1 gen 1444854 flags 1 > > [26062.127133] ref#0: shared data backref parent 214908928 > > count 1 > > [26062.127136] item 61 key (458667044864 168 24576) itemoff 12292 > > itemsize 79 > > [26062.127138] extent refs 3 gen 1800750 flags 1 > > [26062.127139] ref#0: extent data backref root 456 objectid > > 56413614 offset 709386240 count 1 > > [26062.127141] ref#1: shared data backref parent 509783556096 > > count 1 > > [26062.127143] ref#2: shared data backref parent 508544974848 > > count 1 > > [26062.127147] item 62 key (458667069440 168 69632) itemoff 12226 > > itemsize 66 > > [26062.127148] extent refs 2 gen 2368707 flags 1 > > [26062.127149] ref#0: extent data backref root 456 objectid > > 72925787 offset 3932160 count 1 > > [26062.127151] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.127153] item 63 key (458667143168 168 155648) itemoff 12043 > > itemsize 183 > > [26062.127155] extent refs 11 gen 1800674 flags 1 > > [26062.127156] ref#0: extent data backref root 456 objectid > > 56413614 offset 35766272 count 1 > > [26062.127157] ref#1: shared data backref parent 508152905728 > > count 1 > > [26062.127159] ref#2: shared data backref parent 508031057920 > > count 1 > > [26062.127160] ref#3: shared data backref parent 493563166720 > > count 1 > > [26062.127161] ref#4: shared data backref parent 493539934208 > > count 1 > > [26062.127163] ref#5: shared data backref parent 492674908160 > > count 1 > > [26062.127164] ref#6: shared data backref parent 475884208128 > > count 1 > > [26062.127165] ref#7: shared data backref parent 471032266752 > > count 1 > > [26062.127167] ref#8: shared data backref parent 436111720448 > > count 1 > > [26062.127168] ref#9: shared data backref parent 883179520 > > count 1 > > [26062.127170] ref#10: shared data backref parent 83017728 > > count 1 > > [26062.127172] item 64 key (458667323392 168 393216) itemoff 12006 > > itemsize 37 > > [26062.127173] extent refs 1 gen 1444854 flags 1 > > [26062.127174] ref#0: shared data backref parent 214908928 > > count 1 > > [26062.127176] item 65 key (458668109824 168 393216) itemoff 11940 > > itemsize 66 > > [26062.127177] extent refs 2 gen 2381729 flags 1 > > [26062.127178] ref#0: extent data backref root 456 objectid > > 73362062 offset 131072 count 1 > > [26062.127180] ref#1: shared data backref parent 437808545792 > > count 1 > > [26062.127182] item 66 key (458668605440 168 73728) itemoff 11874 > > itemsize 66 > > [26062.127183] extent refs 2 gen 2369098 flags 1 > > [26062.127184] ref#0: extent data backref root 456 objectid > > 72925787 offset 4997120 count 1 > > [26062.127186] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.127188] item 67 key (458668683264 168 77824) itemoff 11808 > > itemsize 66 > > [26062.127189] extent refs 2 gen 2368700 flags 1 > > [26062.127190] ref#0: extent data backref root 456 objectid > > 72993362 offset 393216 count 1 > > [26062.127191] ref#1: shared data backref parent 494105804800 > > count 1 > > [26062.127193] item 68 key (458668761088 168 1167360) itemoff 11771 > > itemsize 37 > > [26062.127195] extent refs 1 gen 1444854 flags 1 > > [26062.127195] ref#0: shared data backref parent 102547456 > > count 1 > > [26062.127197] item 69 key (458670264320 168 24576) itemoff 11692 > > itemsize 79 > > [26062.127198] extent refs 3 gen 1800750 flags 1 > > [26062.127199] ref#0: extent data backref root 456 objectid > > 56413614 offset 717283328 count 1 > > [26062.127201] ref#1: shared data backref parent 509783408640 > > count 1 > > [26062.127202] ref#2: shared data backref parent 508543451136 > > count 1 > > [26062.127204] item 70 key (458670465024 168 1814528) itemoff 11655 > > itemsize 37 > > [26062.127205] extent refs 1 gen 1444854 flags 1 > > [26062.127206] ref#0: shared data backref parent 93732864 > > count 1 > > [26062.127208] item 71 key (458672279552 168 2256896) itemoff 11618 > > itemsize 37 > > [26062.127209] extent refs 1 gen 1444854 flags 1 > > [26062.127210] ref#0: shared data backref parent 93732864 > > count 1 > > [26062.127213] item 72 key (458674536448 168 1024000) itemoff 11565 > > itemsize 53 > > [26062.127214] extent refs 1 gen 1444854 flags 1 > > [26062.127215] ref#0: extent data backref root 456 objectid > > 50397314 offset 0 count 1 > > [26062.127217] item 73 key (458675560448 168 524288) itemoff 11473 > > itemsize 92 > > [26062.127219] extent refs 4 gen 2419085 flags 1 > > [26062.127220] ref#0: extent data backref root 456 objectid > > 75099153 offset 3670016 count 1 > > [26062.127222] ref#1: shared data backref parent 494075035648 > > count 1 > > [26062.127223] ref#2: shared data backref parent 470850240512 > > count 1 > > [26062.127225] ref#3: shared data backref parent 437034745856 > > count 1 > > [26062.127226] item 74 key (458677182464 168 24576) itemoff 11394 > > itemsize 79 > > [26062.127228] extent refs 3 gen 1800750 flags 1 > > [26062.127229] ref#0: extent data backref root 456 objectid > > 56413614 offset 717316096 count 1 > > [26062.127230] ref#1: shared data backref parent 509783408640 > > count 1 > > [26062.127232] ref#2: shared data backref parent 508543451136 > > count 1 > > [26062.127234] item 75 key (458678693888 168 69632) itemoff 11328 > > itemsize 66 > > [26062.127235] extent refs 2 gen 2368731 flags 1 > > [26062.127236] ref#0: extent data backref root 456 objectid > > 72925787 offset 3997696 count 1 > > [26062.127237] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.127239] item 76 key (458681303040 168 1789952) itemoff 11291 > > itemsize 37 > > [26062.127241] extent refs 1 gen 1444854 flags 1 > > [26062.127241] ref#0: shared data backref parent 93732864 > > count 1 > > [26062.127243] item 77 key (458683092992 168 1941504) itemoff 11254 > > itemsize 37 > > [26062.127244] extent refs 1 gen 1444854 flags 1 > > [26062.127245] ref#0: shared data backref parent 93732864 > > count 1 > > [26062.127247] item 78 key (458685034496 168 1355776) itemoff 11217 > > itemsize 37 > > [26062.127249] extent refs 1 gen 1444854 flags 1 > > [26062.127249] ref#0: shared data backref parent 93732864 > > count 1 > > [26062.127252] item 79 key (458686390272 168 1409024) itemoff 11180 > > itemsize 37 > > [26062.127253] extent refs 1 gen 1444854 flags 1 > > [26062.127254] ref#0: shared data backref parent 93732864 > > count 1 > > [26062.127257] item 80 key (458687799296 168 1748992) itemoff 11143 > > itemsize 37 > > [26062.127258] extent refs 1 gen 1444854 flags 1 > > [26062.127259] ref#0: shared data backref parent 93732864 > > count 1 > > [26062.127262] item 81 key (458690596864 168 393216) itemoff 11090 > > itemsize 53 > > [26062.127263] extent refs 1 gen 2381741 flags 1 > > [26062.127264] ref#0: extent data backref root 456 objectid > > 73362154 offset 131072 count 1 > > [26062.127266] item 82 key (458691379200 168 69632) itemoff 11024 > > itemsize 66 > > [26062.127268] extent refs 2 gen 2368882 flags 1 > > [26062.127269] ref#0: extent data backref root 456 objectid > > 72925787 offset 4390912 count 1 > > [26062.127270] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.127272] item 83 key (458692284416 168 73728) itemoff 10958 > > itemsize 66 > > [26062.127274] extent refs 2 gen 2368909 flags 1 > > [26062.127275] ref#0: extent data backref root 456 objectid > > 72925787 offset 4456448 count 1 > > [26062.127277] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.127279] item 84 key (458695856128 168 69632) itemoff 10892 > > itemsize 66 > > [26062.127280] extent refs 2 gen 2369146 flags 1 > > [26062.127281] ref#0: extent data backref root 456 objectid > > 72925787 offset 5128192 count 1 > > [26062.127283] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.127285] item 85 key (458699677696 168 53248) itemoff 10855 > > itemsize 37 > > [26062.127286] extent refs 1 gen 2369353 flags 1 > > [26062.127287] ref#0: shared data backref parent 510167498752 > > count 1 > > [26062.127289] item 86 key (458699730944 168 8192) itemoff 10776 > > itemsize 79 > > [26062.127294] extent refs 3 gen 1800733 flags 1 > > [26062.127294] ref#0: extent data backref root 456 objectid > > 56413614 offset 673275904 count 1 > > [26062.127296] ref#1: shared data backref parent 509783752704 > > count 1 > > [26062.127298] ref#2: shared data backref parent 509351313408 > > count 1 > > [26062.127299] item 87 key (458699747328 168 155648) itemoff 10593 > > itemsize 183 > > [26062.127303] extent refs 22 gen 1800674 flags 1 > > [26062.127304] ref#0: extent data backref root 456 objectid > > 56413614 offset 36257792 count 2 > > [26062.127306] ref#1: shared data backref parent 508152889344 > > count 2 > > [26062.127307] ref#2: shared data backref parent 508031139840 > > count 2 > > [26062.127308] ref#3: shared data backref parent 493563478016 > > count 2 > > [26062.127310] ref#4: shared data backref parent 493539983360 > > count 2 > > [26062.127311] ref#5: shared data backref parent 492674990080 > > count 2 > > [26062.127312] ref#6: shared data backref parent 475132166144 > > count 2 > > [26062.127314] ref#7: shared data backref parent 471032348672 > > count 2 > > [26062.127315] ref#8: shared data backref parent 436111769600 > > count 2 > > [26062.127317] ref#9: shared data backref parent 883359744 > > count 2 > > [26062.127318] ref#10: shared data backref parent 85082112 > > count 2 > > [26062.127320] item 88 key (458700173312 168 180224) itemoff 10410 > > itemsize 183 > > [26062.127321] extent refs 33 gen 1800674 flags 1 > > [26062.127322] ref#0: extent data backref root 456 objectid > > 56413614 offset 36610048 count 3 > > [26062.127324] ref#1: shared data backref parent 508152889344 > > count 3 > > [26062.127325] ref#2: shared data backref parent 508031139840 > > count 3 > > [26062.127327] ref#3: shared data backref parent 493563478016 > > count 3 > > [26062.127328] ref#4: shared data backref parent 493539983360 > > count 3 > > [26062.127329] ref#5: shared data backref parent 492674990080 > > count 3 > > [26062.127331] ref#6: shared data backref parent 475132166144 > > count 3 > > [26062.127333] ref#7: shared data backref parent 471032348672 > > count 3 > > [26062.127334] ref#8: shared data backref parent 436111769600 > > count 3 > > [26062.127335] ref#9: shared data backref parent 883359744 > > count 3 > > [26062.127337] ref#10: shared data backref parent 85082112 > > count 3 > > [26062.127338] item 89 key (458700353536 168 524288) itemoff 10318 > > itemsize 92 > > [26062.127340] extent refs 4 gen 2419085 flags 1 > > [26062.127341] ref#0: extent data backref root 456 objectid > > 75099153 offset 4194304 count 1 > > [26062.127342] ref#1: shared data backref parent 494075035648 > > count 1 > > [26062.127344] ref#2: shared data backref parent 470850240512 > > count 1 > > [26062.127345] ref#3: shared data backref parent 437034745856 > > count 1 > > [26062.127347] item 90 key (458701094912 168 69632) itemoff 10252 > > itemsize 66 > > [26062.127348] extent refs 2 gen 2368932 flags 1 > > [26062.127349] ref#0: extent data backref root 456 objectid > > 72925787 offset 4526080 count 1 > > [26062.127351] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.127353] item 91 key (458701164544 168 57344) itemoff 10215 > > itemsize 37 > > [26062.127354] extent refs 1 gen 2369353 flags 1 > > [26062.127355] ref#0: shared data backref parent 510165155840 > > count 1 > > [26062.127356] item 92 key (458701221888 168 73728) itemoff 10149 > > itemsize 66 > > [26062.127358] extent refs 2 gen 2369168 flags 1 > > [26062.127359] ref#0: extent data backref root 456 objectid > > 72925787 offset 5193728 count 1 > > [26062.127360] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.127362] item 93 key (458701295616 168 61440) itemoff 10096 > > itemsize 53 > > [26062.127364] extent refs 1 gen 2369305 flags 1 > > [26062.127365] ref#0: extent data backref root 456 objectid > > 73017376 offset 0 count 1 > > [26062.127367] item 94 key (458702897152 168 524288) itemoff 10004 > > itemsize 92 > > [26062.127369] extent refs 4 gen 2419085 flags 1 > > [26062.127370] ref#0: extent data backref root 456 objectid > > 75099153 offset 4718592 count 1 > > [26062.127372] ref#1: shared data backref parent 494075035648 > > count 1 > > [26062.127374] ref#2: shared data backref parent 470850240512 > > count 1 > > [26062.127375] ref#3: shared data backref parent 437034745856 > > count 1 > > [26062.127377] item 95 key (458703454208 168 69632) itemoff 9938 > > itemsize 66 > > [26062.127378] extent refs 2 gen 2368955 flags 1 > > [26062.127379] ref#0: extent data backref root 456 objectid > > 72925787 offset 4591616 count 1 > > [26062.127382] ref#1: shared data backref parent 437615230976 > > count 1 > > [26062.127384] item 96 key (458703523840 168 294912) itemoff 9901 > > itemsize 37 > > [26062.127385] extent refs 1 gen 2369352 flags 1 > > [26062.127386] ref#0: shared data backref parent 510178295808 > > count 1 > > [26062.127388] item 97 key (458703818752 168 81920) itemoff 9864 > > itemsize 37 > > [26062.127390] extent refs 1 gen 2369352 flags 1 > > [26062.127391] ref#0: shared data backref parent 510058790912 > > count 1 > > [26062.127393] item 98 key (458703900672 168 131072) itemoff 9827 > > itemsize 37 > > [26062.127394] extent refs 1 gen 2369352 flags 1 > > [26062.127395] ref#0: shared data backref parent 510059184128 > > count 1 > > [26062.127398] item 99 key (458704031744 168 524288) itemoff 9774 > > itemsize 53 > > [26062.127399] extent refs 1 gen 2378552 flags 1 > > [26062.127400] ref#0: extent data backref root 456 objectid > > 73276414 offset 11010048 count 1 > > [26062.127403] item 100 key (458704556032 168 524288) itemoff 9721 > > itemsize 53 > > [26062.127405] extent refs 1 gen 2378552 flags 1 > > [26062.127406] ref#0: extent data backref root 456 objectid > > 73276414 offset 11534336 count 1 > > [26062.127408] item 101 key (458705080320 168 393216) itemoff 9668 > > itemsize 53 > > [26062.127409] extent refs 1 gen 2381741 flags 1 > > [26062.127410] ref#0: extent data backref root 456 objectid > > 73362155 offset 131072 count 1 > > [26062.127413] item 102 key (458707353600 168 81920) itemoff 9602 > > itemsize 66 > > [26062.127414] extent refs 2 gen 2368700 flags 1 > > [26062.127415] ref#0: extent data backref root 456 objectid > > 72993362 offset 131072 count 1 > > [26062.127416] ref#1: shared data backref parent 494105804800 > > count 1 > > [26062.127419] item 103 key (458707435520 168 81920) itemoff 9536 > > itemsize 66 > > [26062.127420] extent refs 2 gen 2368700 flags 1 > > [26062.127421] ref#0: extent data backref root 456 objectid > > 72993362 offset 524288 count 1 > > [26062.127423] ref#1: shared data backref parent 494105804800 > > count 1 > > [26062.127425] item 104 key (458707517440 168 81920) itemoff 9470 > > itemsize 66 > > [26062.127426] extent refs 2 gen 2368700 flags 1 > > [26062.127428] ref#0: extent data backref root 456 objectid > > 72993362 offset 655360 count 1 > > [26062.127430] ref#1: shared data backref parent 494105804800 > > count 1 > > [26062.127432] item 105 key (458707738624 168 57344) itemoff 9287 > > itemsize 183 > > [26062.127434] extent refs 11 gen 1800699 flags 1 > > [26062.127435] ref#0: extent data backref root 456 objectid > > 56413614 offset 39002112 count 1 > > [26062.127437] ref#1: shared data backref parent 508152987648 > > count 1 > > [26062.127439] ref#2: shared data backref parent 508031172608 > > count 1 > > [26062.127440] ref#3: shared data backref parent 493563822080 > > count 1 > > [26062.127441] ref#4: shared data backref parent 493540130816 > > count 1 > > [26062.127443] ref#5: shared data backref parent 492675170304 > > count 1 > > [26062.127444] ref#6: shared data backref parent 475884584960 > > count 1 > > [26062.127446] ref#7: shared data backref parent 471032496128 > > count 1 > > [26062.127447] ref#8: shared data backref parent 436111884288 > > count 1 > > [26062.127448] ref#9: shared data backref parent 883703808 > > count 1 > > [26062.127450] ref#10: shared data backref parent 85671936 > > count 1 > > [26062.127452] item 106 key (458707800064 168 393216) itemoff 9250 > > itemsize 37 > > [26062.127453] extent refs 1 gen 1444854 flags 1 > > [26062.127454] ref#0: shared data backref parent 214908928 > > count 1 > > [26062.127457] item 107 key (458708193280 168 11943936) itemoff 9213 > > itemsize 37 > > [26062.127458] extent refs 1 gen 2426255 flags 1 > > [26062.127459] ref#0: shared data backref parent 436271005696 > > count 1 > > [26062.127461] item 108 key (458725122048 168 131072) itemoff 9030 > > itemsize 183 > > [26062.127463] extent refs 22 gen 1800674 flags 1 > > [26062.127464] ref#0: extent data backref root 456 objectid > > 56413614 offset 38928384 count 2 > > [26062.127465] ref#1: shared data backref parent 508152987648 > > count 2 > > [26062.127467] ref#2: shared data backref parent 508031172608 > > count 2 > > [26062.127468] ref#3: shared data backref parent 493563822080 > > count 2 > > [26062.127470] ref#4: shared data backref parent 493540130816 > > count 2 > > [26062.127472] ref#5: shared data backref parent 492675170304 > > count 2 > > [26062.127473] ref#6: shared data backref parent 475884584960 > > count 2 > > [26062.127475] ref#7: shared data backref parent 471032496128 > > count 2 > > [26062.127476] ref#8: shared data backref parent 436111884288 > > count 2 > > [26062.127478] ref#9: shared data backref parent 883703808 > > count 2 > > [26062.127480] ref#10: shared data backref parent 85671936 > > count 2 > > [26062.127483] item 109 key (458725285888 168 1069056) itemoff 8993 > > itemsize 37 > > [26062.127486] extent refs 1 gen 1444854 flags 1 > > [26062.127488] ref#0: shared data backref parent 167198720 > > count 1 > > [26062.127491] item 110 key (458726379520 168 3158016) itemoff 8927 > > itemsize 66 > > [26062.127494] extent refs 2 gen 1400856 flags 1 > > [26062.127496] ref#0: extent data backref root 456 objectid > > 49348086 offset 0 count 1 > > [26062.127498] ref#1: shared data backref parent 470954196992 > > count 1 > > [26062.127501] item 111 key (458729537536 168 2166784) itemoff 8890 > > itemsize 37 > > [26062.127503] extent refs 1 gen 1444854 flags 1 > > [26062.127504] ref#0: shared data backref parent 93732864 > > count 1 > > [26062.127507] item 112 key (458731704320 168 393216) itemoff 8837 > > itemsize 53 > > [26062.127510] extent refs 1 gen 2381741 flags 1 > > [26062.127512] ref#0: extent data backref root 456 objectid > > 73362156 offset 131072 count 1 > > [26062.127518] item 113 key (458732539904 168 77824) itemoff 8771 > > itemsize 66 > > [26062.127520] extent refs 2 gen 2368701 flags 1 > > [26062.127521] ref#0: extent data backref root 456 objectid > > 72993032 offset 0 count 1 > > [26062.127523] ref#1: shared data backref parent 494107131904 > > count 1 > > [26062.127526] item 114 key (458732752896 168 196608) itemoff 8588 > > itemsize 183 > > [26062.127527] extent refs 44 gen 1800674 flags 1 > > [26062.127528] ref#0: extent data backref root 456 objectid > > 56413614 offset 37789696 count 4 > > [26062.127530] ref#1: shared data backref parent 508152987648 > > count 4 > > [26062.127532] ref#2: shared data backref parent 508031172608 > > count 4 > > [26062.127533] ref#3: shared data backref parent 493563822080 > > count 4 > > [26062.127535] ref#4: shared data backref parent 493540130816 > > count 4 > > [26062.127537] ref#5: shared data backref parent 492675170304 > > count 4 > > [26062.127539] ref#6: shared data backref parent 475884584960 > > count 4 > > [26062.127540] ref#7: shared data backref parent 471032496128 > > count 4 > > [26062.127542] ref#8: shared data backref parent 436111884288 > > count 4 > > [26062.127543] ref#9: shared data backref parent 883703808 > > count 4 > > [26062.127545] ref#10: shared data backref parent 85671936 > > count 4 > > [26062.127547] item 115 key (458732949504 168 24576) itemoff 8509 > > itemsize 79 > > [26062.127549] extent refs 3 gen 1800750 flags 1 > > [26062.127552] ref#0: extent data backref root 456 objectid > > 56413614 offset 738836480 count 1 > > [26062.127554] ref#1: shared data backref parent 509783130112 > > count 1 > > [26062.127557] ref#2: shared data backref parent 508544876544 > > count 1 > > [26062.127560] item 116 key (458732978176 168 1351680) itemoff 8472 > > itemsize 37 > > [26062.127561] extent refs 1 gen 1444854 flags 1 > > [26062.127562] ref#0: shared data backref parent 93732864 > > count 1 > > [26062.127565] item 117 key (458734329856 168 393216) itemoff 8435 > > itemsize 37 > > [26062.127566] extent refs 1 gen 1444854 flags 1 > > [26062.127568] ref#0: shared data backref parent 214908928 > > count 1 > > [26062.127570] item 118 key (458801938432 168 1785856) itemoff 8398 > > itemsize 37 > > [26062.127572] extent refs 1 gen 1444854 flags 1 > > [26062.127573] ref#0: shared data backref parent 93732864 > > count 1 > > [26062.127577] item 119 key (458801938432 192 1073741824) itemoff 8374 > > itemsize 24 > > [26062.127580] block group used 834060288 chunk_objectid 256 > > flags 1 > > [26062.127581] item 120 key (458803724288 168 1409024) itemoff 8337 > > itemsize 37 > > [26062.127583] extent refs 1 gen 1444854 flags 1 > > [26062.127584] ref#0: shared data backref parent 167198720 > > count 1 > > [26062.127586] item 121 key (458805133312 168 1183744) itemoff 8300 > > itemsize 37 > > [26062.127587] extent refs 1 gen 1444854 flags 1 > > [26062.127588] ref#0: shared data backref parent 167198720 > > count 1 > > [26062.127590] item 122 key (458806317056 168 1323008) itemoff 8263 > > itemsize 37 > > [26062.127591] extent refs 1 gen 1444854 flags 1 > > [26062.127592] ref#0: shared data backref parent 167198720 > > count 1 > > [26062.127594] item 123 key (458807640064 168 1589248) itemoff 8226 > > itemsize 37 > > [26062.127595] extent refs 1 gen 1444854 flags 1 > > [26062.127596] ref#0: shared data backref parent 167198720 > > count 1 > > [26062.127598] item 124 key (458809229312 168 2727936) itemoff 8189 > > itemsize 37 > > [26062.127599] extent refs 1 gen 1444854 flags 1 > > [26062.127600] ref#0: shared data backref parent 167198720 > > count 1 > > [26062.127602] item 125 key (458811957248 168 1978368) itemoff 8152 > > itemsize 37 > > [26062.127603] extent refs 1 gen 1444854 flags 1 > > [26062.127604] ref#0: shared data backref parent 167198720 > > count 1 > > [26062.127606] item 126 key (458813943808 168 8192) itemoff 7969 > > itemsize 183 > > [26062.127607] extent refs 11 gen 2409230 flags 1 > > [26062.127608] ref#0: extent data backref root 456 objectid > > 56413614 offset 58589184 count 1 > > [26062.127610] ref#1: shared data backref parent 508153675776 > > count 1 > > [26062.127611] ref#2: shared data backref parent 493566640128 > > count 1 > > [26062.127613] ref#3: shared data backref parent 493540999168 > > count 1 > > [26062.127614] ref#4: shared data backref parent 492676497408 > > count 1 > > [26062.127616] ref#5: shared data backref parent 475884634112 > > count 1 > > [26062.127617] ref#6: shared data backref parent 475691106304 > > count 1 > > [26062.127619] ref#7: shared data backref parent 471034494976 > > count 1 > > [26062.127620] ref#8: shared data backref parent 436113883136 > > count 1 > > [26062.127622] ref#9: shared data backref parent 886407168 > > count 1 > > [26062.127623] ref#10: shared data backref parent 89440256 > > count 1 > > [26062.127625] item 127 key (458813960192 168 8192) itemoff 7799 > > itemsize 170 > > [26062.127626] extent refs 10 gen 2413323 flags 1 > > [26062.127629] ref#0: extent data backref root 456 objectid > > 56413614 offset 58580992 count 1 > > [26062.127631] ref#1: shared data backref parent 508153675776 > > count 1 > > [26062.127633] ref#2: shared data backref parent 493566640128 > > count 1 > > [26062.127635] ref#3: shared data backref parent 493540999168 > > count 1 > > [26062.127636] ref#4: shared data backref parent 492676497408 > > count 1 > > [26062.127638] ref#5: shared data backref parent 475691106304 > > count 1 > > [26062.127640] ref#6: shared data backref parent 471034494976 > > count 1 > > [26062.127642] ref#7: shared data backref parent 436113883136 > > count 1 > > [26062.127643] ref#8: shared data backref parent 886407168 > > count 1 > > [26062.127645] ref#9: shared data backref parent 89440256 > > count 1 > > [26062.127647] item 128 key (458814124032 168 8192) itemoff 7762 > > itemsize 37 > > [26062.127648] extent refs 1 gen 2407793 flags 1 > > [26062.127649] ref#0: shared data backref parent 475884634112 > > count 1 > > [26062.127653] item 129 key (458814738432 168 8192) itemoff 7579 > > itemsize 183 > > [26062.127655] extent refs 11 gen 1800729 flags 1 > > [26062.127656] ref#0: extent data backref root 456 objectid > > 56413614 offset 40116224 count 1 > > [26062.127658] ref#1: shared data backref parent 508153069568 > > count 1 > > [26062.127659] ref#2: shared data backref parent 508031270912 > > count 1 > > [26062.127661] ref#3: shared data backref parent 493564215296 > > count 1 > > [26062.127663] ref#4: shared data backref parent 493540098048 > > count 1 > > [26062.127664] ref#5: shared data backref parent 492676038656 > > count 1 > > [26062.127666] ref#6: shared data backref parent 475884142592 > > count 1 > > [26062.127668] ref#7: shared data backref parent 471032840192 > > count 1 > > [26062.127669] ref#8: shared data backref parent 436112146432 > > count 1 > > [26062.127671] ref#9: shared data backref parent 883752960 > > count 1 > > [26062.127674] ref#10: shared data backref parent 86654976 > > count 1 > > [26062.127678] BTRFS error (device dm-2): unable to find ref byte nr > > 458640384000 parent 0 root 456 owner 73020573 offset 17039360 > > [26062.127680] ------------[ cut here ]------------ > > [26062.127682] BTRFS: Transaction aborted (error -2) > > [26062.127696] WARNING: CPU: 7 PID: 12394 at fs/btrfs/extent-tree.c:7106 > > __btrfs_free_extent+0x1e0/0x921 > > [26062.127698] Modules linked in: msr ccm ipt_MASQUERADE ipt_REJECT > > nf_reject_ipv4 xt_tcpudp xt_conntrack nf_log_ipv4 nf_log_common xt_LOG > > iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 > > iptable_mangle ebtable_filter ebtables ip6table_filter ip6_tables > > iptable_filter ip_tables x_tables bpfilter rfcomm ax25 bnep pci_stub > > vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) autofs4 binfmt_misc > > uinput nfsd auth_rpcgss nfs_acl nfs lockd grace fscache sunrpc nls_utf8 > > nls_cp437 vfat fat cuse ecryptfs bbswitch(OE) configs input_polldev loop > > firewire_sbp2 firewire_core crc_itu_t ppdev parport_pc lp parport uvcvideo > > videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common videodev > > media btusb btrtl btbcm btintel bluetooth ecdh_generic hid_generic usbhid > > hid joydev arc4 coretemp x86_pkg_temp_thermal intel_powerclamp kvm_intel > > kvm irqbypass snd_hda_codec_realtek snd_hda_codec_generic > > intel_wmi_thunderbolt iTCO_wdt wmi_bmof mei_hdcp iTCO_vendor_support > > rtsx_pci_sdmmc snd_hda_intel > > [26062.127733] snd_hda_codec iwlmvm crct10dif_pclmul snd_hda_core > > crc32_pclmul mac80211 snd_hwdep thinkpad_acpi snd_pcm ghash_clmulni_intel > > nvram ledtrig_audio intel_cstate deflate snd_seq efi_pstore iwlwifi > > snd_seq_device snd_timer intel_rapl_perf psmouse pcspkr efivars wmi hwmon > > snd ac battery cfg80211 mei_me soundcore xhci_pci xhci_hcd rtsx_pci > > i2c_i801 rfkill sg nvidiafb intel_pch_thermal usbcore vgastate fb_ddc > > pcc_cpufreq sata_sil24 r8169 libphy mii fuse fan raid456 multipath > > mmc_block mmc_core dm_snapshot dm_bufio dm_mirror dm_region_hash dm_log > > dm_crypt dm_mod async_raid6_recov async_pq async_xor async_memcpy async_tx > > blowfish_x86_64 blowfish_common crc32c_intel bcache crc64 aesni_intel > > input_leds i915 aes_x86_64 crypto_simd cryptd ptp glue_helper serio_raw > > pps_core thermal evdev [last unloaded: e1000e] > > [26062.127793] CPU: 7 PID: 12394 Comm: btrfs-transacti Tainted: G W > > OE 5.1.21-amd64-preempt-sysrq-20190816 #5 > > [26062.127795] Hardware name: LENOVO 20ERCTO1WW/20ERCTO1WW, BIOS N1DET95W > > (2.21 ) 12/13/2017 > > [26062.127799] RIP: 0010:__btrfs_free_extent+0x1e0/0x921 > > [26062.127801] Code: e8 82 d2 fe ff 48 8b 43 50 f0 48 0f ba a8 30 17 00 00 > > 02 0f 92 c0 5a 84 c0 75 11 44 89 ee 48 c7 c7 03 d8 f4 89 e8 33 f1 d8 ff > > <0f> 0b b9 fe ff ff ff ba c2 1b 00 00 48 c7 c6 e0 c7 c3 89 48 89 df > > [26062.127803] RSP: 0018:ffffb2d9c46e7c88 EFLAGS: 00010282 > > [26062.127805] RAX: 0000000000000000 RBX: ffff9abca20884e0 RCX: > > 0000000000000007 > > [26062.127807] RDX: 0000000000000000 RSI: ffffb2d9c46e7b64 RDI: > > ffff9abccf5d6550 > > [26062.127809] RBP: ffff9ab5a4545460 R08: 0000000000000001 R09: > > ffffffff8a80c7af > > [26062.127811] R10: 0000000005f5e100 R11: ffffb2d9c46e7b27 R12: > > 0000000000000169 > > [26062.127813] R13: 00000000fffffffe R14: 0000000001040000 R15: > > 0000006ac918e000 > > [26062.127815] FS: 0000000000000000(0000) GS:ffff9abccf5c0000(0000) > > knlGS:0000000000000000 > > [26062.127817] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > [26062.127819] CR2: 0000199a9fb4d000 CR3: 000000016c20e006 CR4: > > 00000000003606e0 > > [26062.127821] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > > 0000000000000000 > > [26062.127822] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: > > 0000000000000400 > > [26062.127823] Call Trace: > > [26062.127832] __btrfs_run_delayed_refs+0x750/0xc36 > > [26062.127837] ? __switch_to_asm+0x41/0x70 > > [26062.127839] ? __switch_to_asm+0x35/0x70 > > [26062.127841] ? __switch_to_asm+0x41/0x70 > > [26062.127848] ? __switch_to+0x13d/0x3d5 > > [26062.127852] btrfs_run_delayed_refs+0x5d/0x132 > > [26062.127855] btrfs_commit_transaction+0x55/0x7c8 > > [26062.127858] ? start_transaction+0x347/0x3cb > > [26062.127862] transaction_kthread+0xc9/0x135 > > [26062.127865] ? btrfs_cleanup_transaction+0x403/0x403 > > [26062.127869] kthread+0xeb/0xf0 > > [26062.127872] ? kthread_create_worker_on_cpu+0x65/0x65 > > [26062.127875] ret_from_fork+0x35/0x40 > > [26062.127879] ---[ end trace 4c1a6b3749a2f651 ]--- > > [26062.127914] BTRFS: error (device dm-2) in __btrfs_free_extent:7106: > > errno=-2 No such entry > > [26062.127917] BTRFS info (device dm-2): forced readonly > > [26062.127921] BTRFS: error (device dm-2) in btrfs_run_delayed_refs:3008: > > errno=-2 No such entry > > On Tue, Jul 17, 2018 at 05:24:51PM -0700, Marc MERLIN wrote: > > On Wed, Jul 18, 2018 at 08:05:51AM +0800, Qu Wenruo wrote: > > > No OOM triggers? That's a little strange. > > > Maybe it's related to how kernel handles memory over-commit? > > > > Yes, I think you are correct. > > > > > And for the hang, I think it's related to some memory allocation failure > > > and error handler just didn't handle it well, so it's causing deadlock > > > for certain page. > > > > That indeed matches what I'm seeing. > > > > > ENOMEM handling is pretty common but hardly verified, so it's not that > > > strange, but we must locate the problem. > > > > I seem to be getting deadlocks in the kernel, so I'm hoping that at least > > it's checked there, but maybe not? > > > > > In my system, at least I'm not using btrfs as root fs, and for the > > > memory eating program I normally ensure it's eating all the memory + > > > swap, so OOM killer is always triggered, maybe that's the cause. > > > > > > So in your case, maybe it's btrfs not really taking up all memory, thus > > > OOM killer not triggered. > > > > Correct, the swap is not used. > > > > > Any kernel dmesg about OOM killer triggered? > > > > Nothing at all. It never gets triggered. > > > > > > Here is my system when it virtually died: > > > > ER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND > > > > root 31006 21.2 90.7 29639020 29623180 pts/19 D+ 13:49 1:35 > > > > ./btrfs check /dev/mapper/dshelf2 > > > > See how btrs was taking 29GB in that ps output (that's before it takes > > everything and I can't even type ps anymore) > > Note that VSZ is almost equal to RSS. Nothing gets swapped. > > > > Then see free output: > > > > > > total used free shared buffers > > > > cached > > > > Mem: 32643788 32180100 463688 0 44664 > > > > 119508 > > > > -/+ buffers/cache: 32015928 627860 > > > > Swap: 15616764 443676 15173088 > > > > > > For swap, it looks like only some other program's memory is swapped out, > > > not btrfs'. > > > > That's exactly correct. btrfs check never goes to swap, I'm not sure why, > > and because there is virtual memory free, maybe that's why OOM does not > > trigger? > > So I guess I can probably "fix" my problem by removing swap, but ultimately > > it would be useful to know why memory taken by btrfs check does not end up > > in swap. > > > > > And unfortunately, I'm not so familiar with OOM/MM code outside of > > > filesystem. > > > Any help from other experienced developers would definitely help to > > > solve why memory of 'btrfs check' is not swapped out or why OOM killer > > > is not triggered. > > > > Do you have someone from linux-vm you might be able to ask, or should we Cc > > this thread there? > > > > Thanks, > > Marc > > -- > > "A mouse is a device used to point at the xterm you want to type in" - > > A.S.R. > > Microsoft is to operating systems .... > > .... what McDonalds is to gourmet > > cooking > > Home page: http://marc.merlins.org/ > > On Tue, Jul 17, 2018 at 01:59:05PM -0700, Marc MERLIN wrote: > > Ok, I did more testing. Qu is right that btrfs check does not crash the > > kernel. > > It just takes all the memory until linux hangs everywhere, and somehow (no > > idea why) > > the OOM killer never triggers. > > Details below: > > > > On Tue, Jul 17, 2018 at 01:32:57PM -0700, Marc MERLIN wrote: > > > Here is what I got when the system was not doing well (it took minutes to > > > run): > > > > > > total used free shared buffers cached > > > Mem: 32643788 32070952 572836 0 102160 4378772 > > > -/+ buffers/cache: 27590020 5053768 > > > Swap: 15616764 973596 14643168 > > > > ok, the reason it was not that close to 0 was due to /dev/shm it seems. > > I cleared that, and now I can get it to go to near 0 again. > > I'm wrong about the system being fully crashed, it's not, it's just very > > close to being hung. > > I can type killall -9 btrfs in the serial console and wait a few minutes. > > The system eventually recovers, but it's impossible to fix anything via ssh > > apparently because networking does not get to run when I'm in this state. > > > > I'm not sure why my system reproduces this easy while Qu's system does not, > > but Qu was right that the kernel is not dead and that it's merely a problem > > of userspace > > taking all the RAM and somehow not being killed by OOM > > > > I checked the PID and don't see why it's not being killed: > > gargamel:/proc/31006# grep . oom* > > oom_adj:0 > > oom_score:221 << this increases a lot, but OOM never kills it > > oom_score_adj:0 > > > > I have these variables: > > /proc/sys/vm/oom_dump_tasks:1 > > /proc/sys/vm/oom_kill_allocating_task:0 > > /proc/sys/vm/overcommit_kbytes:0 > > /proc/sys/vm/overcommit_memory:0 > > /proc/sys/vm/overcommit_ratio:50 << is this bad (seems default) > > > > Here is my system when it virtually died: > > ER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND > > root 31006 21.2 90.7 29639020 29623180 pts/19 D+ 13:49 1:35 ./btrfs > > check /dev/mapper/dshelf2 > > > > total used free shared buffers cached > > Mem: 32643788 32180100 463688 0 44664 119508 > > -/+ buffers/cache: 32015928 627860 > > Swap: 15616764 443676 15173088 > > > > MemTotal: 32643788 kB > > MemFree: 463440 kB > > MemAvailable: 44864 kB > > Buffers: 44664 kB > > Cached: 120360 kB > > SwapCached: 87064 kB > > Active: 30381404 kB > > Inactive: 585952 kB > > Active(anon): 30334696 kB > > Inactive(anon): 474624 kB > > Active(file): 46708 kB > > Inactive(file): 111328 kB > > Unevictable: 5616 kB > > Mlocked: 5616 kB > > SwapTotal: 15616764 kB > > SwapFree: 15173088 kB > > Dirty: 1636 kB > > Writeback: 4 kB > > AnonPages: 30734240 kB > > Mapped: 67236 kB > > Shmem: 3036 kB > > Slab: 267884 kB > > SReclaimable: 51528 kB > > SUnreclaim: 216356 kB > > KernelStack: 10144 kB > > PageTables: 69284 kB > > NFS_Unstable: 0 kB > > Bounce: 0 kB > > WritebackTmp: 0 kB > > CommitLimit: 31938656 kB > > Committed_AS: 32865492 kB > > VmallocTotal: 34359738367 kB > > VmallocUsed: 0 kB > > VmallocChunk: 0 kB > > HardwareCorrupted: 0 kB > > AnonHugePages: 0 kB > > ShmemHugePages: 0 kB > > ShmemPmdMapped: 0 kB > > CmaTotal: 16384 kB > > CmaFree: 0 kB > > HugePages_Total: 0 > > HugePages_Free: 0 > > HugePages_Rsvd: 0 > > HugePages_Surp: 0 > > Hugepagesize: 2048 kB > > Hugetlb: 0 kB > > DirectMap4k: 560404 kB > > DirectMap2M: 32692224 kB > > > > > > -- > > "A mouse is a device used to point at the xterm you want to type in" - > > A.S.R. > > Microsoft is to operating systems .... > > .... what McDonalds is to gourmet > > cooking > > Home page: http://marc.merlins.org/ > > > -- > "A mouse is a device used to point at the xterm you want to type in" - A.S.R. > Microsoft is to operating systems .... > .... what McDonalds is to gourmet > cooking > Home page: http://marc.merlins.org/ > -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/
