Is this what you are looking for? After this, the CPU gets "stuck" and I have to reboot.
[360491.932226] ------------[ cut here ]------------ [360491.932261] kernel BUG at /home/abuild/rpmbuild/BUILD/kernel-desktop-3.9.6/linux-3.9/fs/btrfs/ctree.c:1144! [360491.932312] invalid opcode: 0000 [#1] PREEMPT SMP [360491.932344] Modules linked in: xfs nilfs2 jfs usb_storage nls_iso8859_1 nls_cp437 vfat fat mmc_block nfsv4 auth_rpcgss nfs fscache lockd sunrpc tun snd_usb_audio snd_usbmidi_lib snd_rawmidi snd_seq_device fuse xt_tcpudp xt_pkttype xt_LOG xt_limit af_packet ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_raw ipt_REJECT iptable_raw xt_CT iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables x_tables arc4 iwldvm mac80211 snd_hda_codec_hdmi snd_hda_codec_conexant iTCO_wdt iTCO_vendor_support mperf coretemp kvm_intel kvm snd_hda_intel snd_hda_codec microcode snd_hwdep snd_pcm thinkpad_acpi snd_timer joydev pcspkr sr_mod snd tpm_tis iwlwifi cdrom e1000e wmi tpm battery ac tpm_bios cfg80211 sdhci_pci soundcore ptp sdhci snd_page_alloc i2c_i801 rfkill pps_core mmc_core lpc_ich mfd_core tcp_westwood sg autofs4 btrfs raid6_pq zlib_deflate xor libcrc32c sha256_generic dm_crypt dm_mod crc32_pclmul ghash_clmulni_intel crc32c_intel aesni_intel ablk_helper cryptd lrw aes_x86_64 xts gf128mul thermal i915 drm_kms_helper drm i2c_algo_bit video button processor thermal_sys scsi_dh_rdac scsi_dh_hp_sw scsi_dh_emc scsi_dh_alua scsi_dh ata_generic ata_piix [360491.933095] CPU 3 [360491.933110] Pid: 22166, comm: btrfs-endio-wri Not tainted 3.9.6-1.g8ead728-desktop #1 LENOVO 4239CTO/4239CTO [360491.933161] RIP: 0010:[<ffffffffa022075b>] [<ffffffffa022075b>] __tree_mod_log_rewind+0x23b/0x240 [btrfs] [360491.933225] RSP: 0018:ffff88014cad7888 EFLAGS: 00010297 [360491.933253] RAX: 0000000000000000 RBX: ffff880065705b40 RCX: ffff88014cad7828 [360491.933289] RDX: 000000000247cc54 RSI: ffff88014949e821 RDI: ffff8801bf916640 [360491.933326] RBP: ffff880073048490 R08: 0000000000001000 R09: ffff88014cad7838 [360491.933362] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c0556640 [360491.933398] R13: 000000000001731e R14: 000000000000003d R15: ffff880158b76340 [360491.933435] FS: 0000000000000000(0000) GS:ffff88021e2c0000(0000) knlGS:0000000000000000 [360491.933476] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [360491.933506] CR2: 00007f0a360017f8 CR3: 000000015be03000 CR4: 00000000000407e0 [360491.933543] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [360491.933579] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [360491.933617] Process btrfs-endio-wri (pid: 22166, threadinfo ffff88014cad6000, task ffff8801a5f8a6c0) [360491.933662] Stack: [360491.933674] ffff88011b573800 ffff88010126e7f0 0000000000000001 0000160000000000 [360491.933719] ffff880073048490 ffffffffa0228d45 6db6db6db6db6db7 ffff8801c0556640 [360491.933763] ffff88020e764000 ffff880000000000 000000000001731e ffff880197cb8158 [360491.933807] Call Trace: [360491.933848] [<ffffffffa0228d45>] btrfs_search_old_slot+0x635/0x950 [btrfs] [360491.933909] [<ffffffffa02a1ec6>] __resolve_indirect_refs+0x156/0x640 [btrfs] [360491.934044] [<ffffffffa02a2e0c>] find_parent_nodes+0x95c/0x1050 [btrfs] [360491.934176] [<ffffffffa02a3592>] btrfs_find_all_roots+0x92/0x100 [btrfs] [360491.934307] [<ffffffffa02a401e>] iterate_extent_inodes+0x16e/0x370 [btrfs] [360491.934440] [<ffffffffa02a42b8>] iterate_inodes_from_logical+0x98/0xc0 [btrfs] [360491.934572] [<ffffffffa024c1c8>] record_extent_backrefs+0x68/0xe0 [btrfs] [360491.934652] [<ffffffffa0256d80>] btrfs_finish_ordered_io+0x150/0x990 [btrfs] [360491.934739] [<ffffffffa0276ef3>] worker_loop+0x153/0x560 [btrfs] [360491.934833] [<ffffffff810697c3>] kthread+0xb3/0xc0 [360491.934864] [<ffffffff815dc6bc>] ret_from_fork+0x7c/0xb0 [360491.934896] DWARF2 unwinder stuck at ret_from_fork+0x7c/0xb0 [360491.934925] [360491.934934] Leftover inexact backtrace: [360491.934934] [360491.934965] [<ffffffff81069710>] ? kthread_create_on_node+0x120/0x120 [360491.934999] Code: c1 48 63 43 58 48 89 c2 48 c1 e2 05 48 8d 54 10 65 48 63 43 2c 48 89 c6 48 c1 e6 05 48 8d 74 30 65 e8 3a af 04 00 e9 b3 fe ff ff <0f> 0b 0f 0b 90 41 57 41 56 41 55 41 54 55 48 89 fd 53 48 83 ec [360491.935188] RIP [<ffffffffa022075b>] __tree_mod_log_rewind+0x23b/0x240 [btrfs] [360491.935233] RSP <ffff88014cad7888> [360491.946047] ---[ end trace 1475a0830dcadf9c ]--- [360491.946051] note: btrfs-endio-wri[22166] exited with preempt_count 1 On Thu, Jun 20, 2013 at 8:11 PM, Chris Mason <chris.ma...@fusionio.com> wrote: > Quoting Jon Nelson (2013-06-18 13:19:04) >> Josef Bacik <jbacik <at> fusionio.com> writes: >> >> > >> > On Tue, Jun 11, 2013 at 11:43:30AM -0400, Sage Weil wrote: >> > > I'm also seeing this hang regularly with both 3.9 and 3.10-rc5. Is this >> > > is a known problem? In this case there is no powercycling; just a >> > > regular >> > > ceph-osd workload. >> >> .. >> >> >> I'm able to cause a complete kernel hang by defrag'ing even one >> file on 3.9.X (3.9.0 through 3.9.4, so far). > > I'm not able to reproduce this here. Could you please capture the > output from sysrq-w during the hang? (It will all go to your dmesg) > > -chris > -- Jon Software Blacksmith -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
