Hi. While testing of various scenarios of RAID5 recovery I got kernel messages about bad page state with soft lockup afterwards.
Tested kernel is vanilla 4.6-rc4 (also reproduced on 4.4.5) without any modifications. Platform is VirtualBox (2 virtual CPU), 64-bit Debian wheezy. Script to reproduce this is attached. Run: "./test-replace-balance.sh <mount point> <drive1 drive2...>" Sequence is: 1) Create RAID5, mount, write some data. 2) Remove drive. 3) Unmount file system and remount again in degraded mode (to detect of missing drive). 4) Replace missing device by another. 5) Start balance. Kernel log: [ 884.607734] BTRFS: device fsid 6913f45e-d1b1-467c-80ad-440d64679790 devid 1 transid 3 /dev/sdc [ 884.739823] BTRFS: device fsid 6913f45e-d1b1-467c-80ad-440d64679790 devid 2 transid 3 /dev/sdd [ 884.927401] BTRFS: device fsid 6913f45e-d1b1-467c-80ad-440d64679790 devid 3 transid 3 /dev/sde [ 884.960044] BTRFS: device fsid 6913f45e-d1b1-467c-80ad-440d64679790 devid 4 transid 3 /dev/sdf [ 886.545691] BTRFS info (device sdf): disk space caching is enabled [ 886.559215] BTRFS: has skinny extents [ 886.570670] BTRFS: flagging fs with big metadata feature [ 886.653966] BTRFS: creating UUID tree [ 891.337060] sd 7:0:0:0: [sdf] Synchronizing SCSI cache [ 891.348417] sd 7:0:0:0: [sdf] Stopping disk [ 891.371520] ata8.00: disabled [ 891.776862] BTRFS error (device sdf): bdev /dev/sdf errs: wr 0, rd 0, flush 1, corrupt 0, gen 0 [ 891.783309] BTRFS warning (device sdf): lost page write due to IO error on /dev/sdf [ 891.792851] BTRFS error (device sdf): bdev /dev/sdf errs: wr 1, rd 0, flush 1, corrupt 0, gen 0 [ 891.804431] BTRFS warning (device sdf): lost page write due to IO error on /dev/sdf [ 891.813735] BTRFS error (device sdf): bdev /dev/sdf errs: wr 2, rd 0, flush 1, corrupt 0, gen 0 [ 894.680113] ata8: hard resetting link [ 895.067539] ata8: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 895.072264] ata8.00: ATA-6: VBOX HARDDISK, 1.0, max UDMA/133 [ 895.078234] ata8.00: 16777216 sectors, multi 128: LBA48 NCQ (depth 31/32) [ 895.096798] ata8.00: configured for UDMA/133 [ 895.100938] ata8: EH complete [ 895.130822] scsi 7:0:0:0: Direct-Access ATA VBOX HARDDISK 1.0 PQ: 0 ANSI: 5 [ 895.181345] sd 7:0:0:0: [sdg] 16777216 512-byte logical blocks: (8.59 GB/8.00 GiB) [ 895.183696] sd 7:0:0:0: Attached scsi generic sg6 type 0 [ 895.214179] sd 7:0:0:0: [sdg] Write Protect is off [ 895.231026] sd 7:0:0:0: [sdg] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 895.288528] sd 7:0:0:0: [sdg] Attached SCSI disk [ 897.596941] BTRFS error (device sdf): bdev /dev/sdf errs: wr 2, rd 0, flush 2, corrupt 0, gen 0 [ 897.604003] BTRFS warning (device sdf): lost page write due to IO error on /dev/sdf [ 897.611944] BTRFS error (device sdf): bdev /dev/sdf errs: wr 3, rd 0, flush 2, corrupt 0, gen 0 [ 897.627306] BTRFS warning (device sdf): lost page write due to IO error on /dev/sdf [ 897.634766] BTRFS error (device sdf): bdev /dev/sdf errs: wr 4, rd 0, flush 2, corrupt 0, gen 0 [ 897.834694] BTRFS info (device sde): allowing degraded mounts [ 897.840566] BTRFS info (device sde): disk space caching is enabled [ 897.852766] BTRFS: has skinny extents [ 897.923986] BTRFS info (device sde): bdev /dev/sdf errs: wr 2, rd 0, flush 1, corrupt 0, gen 0 [ 898.121025] BTRFS info (device sde): dev_replace from <missing disk> (devid 4) to /dev/sdg started [ 904.029908] BTRFS info (device sde): dev_replace from <missing disk> (devid 4) to /dev/sdg finished [ 904.863387] BTRFS info (device sde): relocating block group 6543114240 flags 132 [ 905.081558] BTRFS info (device sde): relocating block group 6476005376 flags 130 [ 905.743629] BTRFS info (device sde): relocating block group 3254779904 flags 129 [ 905.760509] BUG: Bad page state in process ksoftirqd/0 pfn:2b80b [ 905.774543] page:ffffea0000ae02c0 count:0 mapcount:0 mapping:ffff88002b4a0f30 index:0x182000 [ 905.803071] flags: 0x1ffff800000012c(referenced|uptodate|lru|owner_priv_1) [ 905.814529] page dumped because: page still charged to cgroup [ 905.823817] page->mem_cgroup:ffff88002ce52c00 [ 905.830953] bad because of flags: 0x20(lru) [ 905.836428] Modules linked in: cpufreq_userspace cpufreq_powersave cpufreq_stats cpufreq_conservative softdog nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc loop ipmi_devintf ipmi_msghandler joydev iTCO_wdt snd_pcm iTCO_vendor_support snd_timer snd psmouse lpc_ich soundcore mfd_core serio_raw ohci_pci evdev pcspkr ohci_hcd rng_core i2c_piix4 battery parport_pc 8250_fintek parport acpi_cpufreq video ac tpm_tis tpm button processor ext4 crc16 jbd2 mbcache crc32c_generic btrfs(O) xor raid6_pq dm_mod md_mod hid_generic usbhid hid xhci_pci xhci_hcd sg sr_mod cdrom sd_mod ata_generic ehci_pci ehci_hcd ahci usbcore ata_piix libahci libata usb_common scsi_mod e1000 [ 905.959393] CPU: 0 PID: 3 Comm: ksoftirqd/0 Tainted: G O 4.6.0-rc4-scst31x-debug-12+ #2 [ 905.961129] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 [ 905.961129] 0000000000000000 ffffffff812e8935 ffffea0000ae02c0 ffffffff817d68f1 [ 905.961129] ffffffff81167a45 0000000000000020 ffffea0000ae02c0 0000000000000001 [ 905.961129] ffffffff8116867a ffff88002f339000 ffff88002f10a800 ffffea0000ae02c0 [ 905.961129] Call Trace: [ 905.961129] [<ffffffff812e8935>] ? dump_stack+0x5c/0x77 [ 905.961129] [<ffffffff81167a45>] ? bad_page+0xd5/0x140 [ 905.961129] [<ffffffff8116867a>] ? free_pages_prepare+0x2aa/0x2e0 [ 905.961129] [<ffffffff8116a9f2>] ? free_hot_cold_page+0x32/0x180 [ 905.961129] [<ffffffffa02d2c6e>] ? __free_raid_bio+0x7e/0x110 [btrfs] [ 905.961129] [<ffffffffa02d3567>] ? rbio_orig_end_io+0x47/0x80 [btrfs] [ 905.961129] [<ffffffff812bc9f5>] ? blk_update_request+0x85/0x310 [ 905.961129] [<ffffffffa0032530>] ? scsi_end_request+0x30/0x1d0 [scsi_mod] [ 905.961129] [<ffffffffa0034a8e>] ? scsi_io_completion+0xae/0x610 [scsi_mod] [ 905.961129] [<ffffffff812c3cc8>] ? blk_done_softirq+0x78/0x90 [ 905.961129] [<ffffffff8157e2b8>] ? __do_softirq+0xf8/0x28e [ 905.961129] [<ffffffff8107a135>] ? run_ksoftirqd+0x25/0x40 [ 905.961129] [<ffffffff81094ed9>] ? smpboot_thread_fn+0xf9/0x150 [ 905.961129] [<ffffffff81094de0>] ? sort_range+0x20/0x20 [ 905.961129] [<ffffffff81091fdd>] ? kthread+0xbd/0xe0 [ 905.961129] [<ffffffff8157ba22>] ? ret_from_fork+0x22/0x40 [ 905.961129] [<ffffffff81091f20>] ? kthread_create_on_node+0x170/0x170 [ 906.122279] Disabling lock debugging due to kernel taint [ 906.126973] BUG: Bad page state in process ksoftirqd/0 pfn:2b80c [ 906.132504] page:ffffea0000ae0300 count:0 mapcount:0 mapping:ffff88002b4a0f30 index:0x182001 [ 906.145815] flags: 0x1ffff800000002c(referenced|uptodate|lru) [ 906.149863] page dumped because: page still charged to cgroup [ 906.159109] page->mem_cgroup:ffff88002ce52c00 [ 906.164593] bad because of flags: 0x20(lru) [ 906.171565] Modules linked in: cpufreq_userspace cpufreq_powersave cpufreq_stats cpufreq_conservative softdog nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc loop ipmi_devintf ipmi_msghandler joydev iTCO_wdt snd_pcm iTCO_vendor_support snd_timer snd psmouse lpc_ich soundcore mfd_core serio_raw ohci_pci evdev pcspkr ohci_hcd rng_core i2c_piix4 battery parport_pc 8250_fintek parport acpi_cpufreq video ac tpm_tis tpm button processor ext4 crc16 jbd2 mbcache crc32c_generic btrfs(O) xor raid6_pq dm_mod md_mod hid_generic usbhid hid xhci_pci xhci_hcd sg sr_mod cdrom sd_mod ata_generic ehci_pci ehci_hcd ahci usbcore ata_piix libahci libata usb_common scsi_mod e1000 [ 906.306655] CPU: 0 PID: 3 Comm: ksoftirqd/0 Tainted: G B O 4.6.0-rc4-scst31x-debug-12+ #2 [ 906.309077] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 [ 906.309077] 0000000000000000 ffffffff812e8935 ffffea0000ae0300 ffffffff817d68f1 [ 906.309077] ffffffff81167a45 0000000000000020 ffffea0000ae0300 0000000000000001 [ 906.309077] ffffffff8116867a ffff88002f339000 ffff88002f10a800 ffffea0000ae0300 [ 906.309077] Call Trace: [ 906.309077] [<ffffffff812e8935>] ? dump_stack+0x5c/0x77 [ 906.309077] [<ffffffff81167a45>] ? bad_page+0xd5/0x140 [ 906.309077] [<ffffffff8116867a>] ? free_pages_prepare+0x2aa/0x2e0 [ 906.309077] [<ffffffff8116a9f2>] ? free_hot_cold_page+0x32/0x180 [ 906.309077] [<ffffffffa02d2c6e>] ? __free_raid_bio+0x7e/0x110 [btrfs] [ 906.309077] [<ffffffffa02d3567>] ? rbio_orig_end_io+0x47/0x80 [btrfs] [ 906.309077] [<ffffffff812bc9f5>] ? blk_update_request+0x85/0x310 [ 906.309077] [<ffffffffa0032530>] ? scsi_end_request+0x30/0x1d0 [scsi_mod] [ 906.309077] [<ffffffffa0034a8e>] ? scsi_io_completion+0xae/0x610 [scsi_mod] [ 906.309077] [<ffffffff812c3cc8>] ? blk_done_softirq+0x78/0x90 [ 906.309077] [<ffffffff8157e2b8>] ? __do_softirq+0xf8/0x28e [ 906.309077] [<ffffffff8107a135>] ? run_ksoftirqd+0x25/0x40 [ 906.309077] [<ffffffff81094ed9>] ? smpboot_thread_fn+0xf9/0x150 [ 906.309077] [<ffffffff81094de0>] ? sort_range+0x20/0x20 [ 906.309077] [<ffffffff81091fdd>] ? kthread+0xbd/0xe0 [ 906.309077] [<ffffffff8157ba22>] ? ret_from_fork+0x22/0x40 [ 906.309077] [<ffffffff81091f20>] ? kthread_create_on_node+0x170/0x170 [ 906.636549] BUG: Bad page state in process ksoftirqd/0 pfn:2bbb6 [ 906.643307] page:ffffea0000aeed80 count:0 mapcount:0 mapping:ffff88002b4a0f30 index:0x182002 [ 906.657821] flags: 0x1ffff800000002c(referenced|uptodate|lru) [ 906.662972] page dumped because: page still charged to cgroup [ 906.672025] page->mem_cgroup:ffff88002ce52c00 [ 906.678670] bad because of flags: 0x20(lru) [ 906.683654] Modules linked in: cpufreq_userspace cpufreq_powersave cpufreq_stats cpufreq_conservative softdog nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc loop ipmi_devintf ipmi_msghandler joydev iTCO_wdt snd_pcm iTCO_vendor_support snd_timer snd psmouse lpc_ich soundcore mfd_core serio_raw ohci_pci evdev pcspkr ohci_hcd rng_core i2c_piix4 battery parport_pc 8250_fintek parport acpi_cpufreq video ac tpm_tis tpm button processor ext4 crc16 jbd2 mbc ache crc32c_generic btrfs(O) xor raid6_pq dm_mod md_mod hid_generic usbhid hid xhci_pci xhci_hcd sg sr_mod cdrom sd_mod ata_generic ehci_pci ehci_hcd ahci usbcore ata_piix libahci libata usb_common scsi_mod e1000 [ 906.832358] CPU: 0 PID: 3 Comm: ksoftirqd/0 Tainted: G B O 4.6.0-rc4-scst31x-debug-12+ #2 [ 906.836342] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 [ 906.836342] 0000000000000000 ffffffff812e8935 ffffea0000aeed80 ffffffff817d68f1 [ 906.836342] ffffffff81167a45 0000000000000020 ffffea0000aeed80 0000000000000001 [ 906.836342] ffffffff8116867a ffff88002f339000 ffff88002f10a800 ffffea0000aeed80 [ 906.836342] Call Trace: [ 906.836342] [<ffffffff812e8935>] ? dump_stack+0x5c/0x77 [ 906.836342] [<ffffffff81167a45>] ? bad_page+0xd5/0x140 [ 906.836342] [<ffffffff8116867a>] ? free_pages_prepare+0x2aa/0x2e0 [ 906.836342] [<ffffffff8116a9f2>] ? free_hot_cold_page+0x32/0x180 [ 906.836342] [<ffffffffa02d2c6e>] ? __free_raid_bio+0x7e/0x110 [btrfs] [ 906.836342] [<ffffffffa02d3567>] ? rbio_orig_end_io+0x47/0x80 [btrfs] [ 906.836342] [<ffffffff812bc9f5>] ? blk_update_request+0x85/0x310 [ 906.836342] [<ffffffffa0032530>] ? scsi_end_request+0x30/0x1d0 [scsi_mod] [ 906.836342] [<ffffffffa0034a8e>] ? scsi_io_completion+0xae/0x610 [scsi_mod] [ 906.836342] [<ffffffff812c3cc8>] ? blk_done_softirq+0x78/0x90 [ 906.836342] [<ffffffff8157e2b8>] ? __do_softirq+0xf8/0x28e [ 906.836342] [<ffffffff8107a135>] ? run_ksoftirqd+0x25/0x40 [ 906.836342] [<ffffffff81094ed9>] ? smpboot_thread_fn+0xf9/0x150 [ 906.836342] [<ffffffff81094de0>] ? sort_range+0x20/0x20 [ 906.836342] [<ffffffff81091fdd>] ? kthread+0xbd/0xe0 [ 906.836342] [<ffffffff8157ba22>] ? ret_from_fork+0x22/0x40 [ 906.836342] [<ffffffff81091f20>] ? kthread_create_on_node+0x170/0x170 [ 907.037388] BUG: Bad page state in process ksoftirqd/0 pfn:2bbb5 [ 907.046272] page:ffffea0000aeed40 count:0 mapcount:0 mapping:ffff88002b4a0f30 index:0x182003 [ 907.057160] flags: 0x1ffff800000002c(referenced|uptodate|lru) [ 907.064933] page dumped because: page still charged to cgroup [ 907.070041] page->mem_cgroup:ffff88002ce52c00 [ 907.078497] bad because of flags: 0x20(lru) [ 907.082406] Modules linked in: cpufreq_userspace cpufreq_powersave cpufreq_stats cpufreq_conservative softdog nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc loop ipmi_devintf ipmi_msghandler joydev iTCO_wdt snd_pcm iTCO_vendor_support snd_timer snd psmouse lpc_ich soundcore mfd_core serio_raw ohci_pci evdev pcspkr ohci_hcd rng_core i2c_piix4 battery parport_pc 8250_fintek parport acpi_cpufreq video ac tpm_tis tpm button processor ext4 crc16 jbd2 mbcache crc32c_generic btrfs(O) xor raid6_pq dm_mod md_mod hid_generic usbhid hid xhci_pci xhci_hcd sg sr_mod cdrom sd_mod ata_generic ehci_pci ehci_hcd ahci usbcore ata_piix libahci libata usb_common scsi_mod e1000 [ 907.172217] CPU: 0 PID: 3 Comm: ksoftirqd/0 Tainted: G B O 4.6.0-rc4-scst31x-debug-12+ #2 [ 907.176199] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 [ 907.176199] 0000000000000000 ffffffff812e8935 ffffea0000aeed40 ffffffff817d68f1 [ 907.176199] ffffffff81167a45 0000000000000020 ffffea0000aeed40 0000000000000001 [ 907.176199] ffffffff8116867a ffff88002f339000 ffff88002f10a800 ffffea0000aeed40 [ 907.176199] Call Trace: [ 907.176199] [<ffffffff812e8935>] ? dump_stack+0x5c/0x77 [ 907.176199] [<ffffffff81167a45>] ? bad_page+0xd5/0x140 [ 907.176199] [<ffffffff8116867a>] ? free_pages_prepare+0x2aa/0x2e0 [ 907.176199] [<ffffffff8116a9f2>] ? free_hot_cold_page+0x32/0x180 [ 907.176199] [<ffffffffa02d2c6e>] ? __free_raid_bio+0x7e/0x110 [btrfs] [ 907.176199] [<ffffffffa02d3567>] ? rbio_orig_end_io+0x47/0x80 [btrfs] [ 907.176199] [<ffffffff812bc9f5>] ? blk_update_request+0x85/0x310 [ 907.176199] [<ffffffffa0032530>] ? scsi_end_request+0x30/0x1d0 [scsi_mod] [ 907.176199] [<ffffffffa0034a8e>] ? scsi_io_completion+0xae/0x610 [scsi_mod] [ 907.176199] [<ffffffff812c3cc8>] ? blk_done_softirq+0x78/0x90 [ 907.176199] [<ffffffff8157e2b8>] ? __do_softirq+0xf8/0x28e [ 907.176199] [<ffffffff8107a135>] ? run_ksoftirqd+0x25/0x40 [ 907.176199] [<ffffffff81094ed9>] ? smpboot_thread_fn+0xf9/0x150 [ 907.176199] [<ffffffff81094de0>] ? sort_range+0x20/0x20 [ 907.176199] [<ffffffff81091fdd>] ? kthread+0xbd/0xe0 [ 907.176199] [<ffffffff8157ba22>] ? ret_from_fork+0x22/0x40 [ 907.176199] [<ffffffff81091f20>] ? kthread_create_on_node+0x170/0x170 [ 908.223534] BTRFS info (device sde): found 1 extents [ 910.631246] BTRFS info (device sde): found 1 extents [ 910.775915] BTRFS info (device sde): relocating block group 33554432 flags 132 [ 911.028542] BTRFS info (device sde): found 9 extents [ 911.132418] BTRFS info (device sde): relocating block group 20971520 flags 130 [ 911.372007] BTRFS info (device sde): found 1 extents [ 911.888562] sd 6:0:0:0: [sde] Synchronizing SCSI cache [ 911.898486] sd 6:0:0:0: [sde] Stopping disk [ 911.936759] ata7.00: disabled [ 912.352163] BTRFS error (device sde): bdev /dev/sde errs: wr 0, rd 0, flush 1, corrupt 0, gen 0 [ 912.362579] BTRFS warning (device sde): lost page write due to IO error on /dev/sde [ 912.373375] BTRFS error (device sde): bdev /dev/sde errs: wr 1, rd 0, flush 1, corrupt 0, gen 0 [ 912.381443] BTRFS warning (device sde): lost page write due to IO error on /dev/sde [ 912.388582] BTRFS error (device sde): bdev /dev/sde errs: wr 2, rd 0, flush 1, corrupt 0, gen 0 [ 920.162025] ata7: hard resetting link [ 920.571717] ata7: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 920.575470] ata7.00: ATA-6: VBOX HARDDISK, 1.0, max UDMA/133 [ 920.588670] ata7.00: 41943040 sectors, multi 128: LBA48 NCQ (depth 31/32) [ 920.594698] ata7.00: configured for UDMA/133 [ 920.597904] ata7: EH complete [ 920.622277] scsi 6:0:0:0: Direct-Access ATA VBOX HARDDISK 1.0 PQ: 0 ANSI: 5 [ 920.698264] sd 6:0:0:0: Attached scsi generic sg5 type 0 [ 920.708298] sd 6:0:0:0: [sdf] 41943040 512-byte logical blocks: (21.5 GB/20.0 GiB) [ 920.740235] sd 6:0:0:0: [sdf] Write Protect is off [ 920.764155] sd 6:0:0:0: [sdf] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 920.823199] BTRFS error (device sde): bdev /dev/sde errs: wr 2, rd 0, flush 2, corrupt 0, gen 0 [ 920.836207] BTRFS warning (device sde): lost page write due to IO error on /dev/sde [ 920.868750] BTRFS error (device sde): bdev /dev/sde errs: wr 3, rd 0, flush 2, corrupt 0, gen 0 [ 920.895418] BTRFS warning (device sde): lost page write due to IO error on /dev/sde [ 920.903712] BTRFS error (device sde): bdev /dev/sde errs: wr 4, rd 0, flush 2, corrupt 0, gen 0 [ 920.916416] sd 6:0:0:0: [sdf] Attached SCSI disk [ 941.996388] INFO: rcu_sched self-detected stall on CPU[ 942.010038] INFO: rcu_sched detected stalls on CPUs/tasks: [ 942.010044] 1-...: (2833 ticks this GP) idle=59d/140000000000001/0 softirq=11688/11688 fqs=2994 [ 942.010044] (detected by 0, t=5253 jiffies, g=10112, c=10111, q=267) [ 942.010047] Task dump for CPU 1: [ 942.010049] umount R running task 0 3460 3243 0x00000008 [ 942.010060] 0000000000182040 ffff880028e2bc78 ffffea0000ae02c0 ffffffffffffff10 [ 942.010063] ffffffff811657cf 0000000000000010 0000000000000246 ffff880028e2bc78 [ 942.010065] 0000000000000018 ffffffff81165865 0000000000182000 0000000000182040 [ 942.010068] Call Trace: [ 942.010079] [<ffffffff811657cf>] ? find_get_entries+0x4f/0x170 [ 942.010121] [<ffffffff81165865>] ? find_get_entries+0xe5/0x170 [ 942.010125] [<ffffffff81173dba>] ? pagevec_lookup_entries+0x1a/0x30 [ 942.010127] [<ffffffff81174069>] ? invalidate_inode_pages2_range+0x99/0x460 [ 942.010242] [<ffffffffa025d1fc>] ? close_ctree+0x16c/0x360 [btrfs] [ 942.010246] [<ffffffff811de8d9>] ? generic_shutdown_super+0x69/0xf0 [ 942.010248] [<ffffffff811deb9e>] ? kill_anon_super+0xe/0x20 [ 942.010262] [<ffffffffa0230f23>] ? btrfs_kill_super+0x13/0x100 [btrfs] [ 942.010264] [<ffffffff811decf4>] ? deactivate_locked_super+0x34/0x60 [ 942.010266] [<ffffffff811fae5b>] ? cleanup_mnt+0x3b/0x80 [ 942.010270] [<ffffffff81090791>] ? task_work_run+0x71/0x90 [ 942.010273] [<ffffffff8100330a>] ? exit_to_usermode_loop+0xba/0xc0 [ 942.010275] [<ffffffff81003b25>] ? syscall_return_slowpath+0x45/0x50 [ 942.010278] [<ffffffff8157b87e>] ? entry_SYSCALL_64_fastpath+0xa6/0xa8 [ 941.996388] [ 941.996388] 1-...: (2833 ticks this GP) idle=59d/140000000000001/0 softirq=11688/11688 fqs=3043 [ 941.996388] (t=5309 jiffies g=10112 c=10111 q=270) [ 941.996388] Task dump for CPU 1: [ 941.996388] umount R running task 0 3460 3243 0x00000008 [ 941.996388] ffffffff81a4f300 ffffffff810d0a23 ffff88002fd16940 ffffffff81a4f300 [ 941.996388] 0000000000000000 ffff88002b82adc0 ffffffff810d42dd ffff88002fd15bc0 [ 941.996388] 0000000000015bc0 0000000000000001 ffff88002fd03e88 ffff88002fd03e88 [ 941.996388] Call Trace: [ 941.996388] <IRQ> [<ffffffff810d0a23>] ? rcu_dump_cpu_stacks+0x83/0xd0 [ 941.996388] [<ffffffff810d42dd>] ? rcu_check_callbacks+0x4ad/0x760 [ 941.996388] [<ffffffff810e87f0>] ? tick_sched_handle.isra.13+0x50/0x50 [ 941.996388] [<ffffffff810da212>] ? update_process_times+0x32/0x60 [ 941.996388] [<ffffffff810e87c0>] ? tick_sched_handle.isra.13+0x20/0x50 [ 941.996388] [<ffffffff810e8828>] ? tick_sched_timer+0x38/0x70 [ 941.996388] [<ffffffff810daa3a>] ? __hrtimer_run_queues+0xda/0x260 [ 941.996388] [<ffffffff810db179>] ? hrtimer_interrupt+0x99/0x190 [ 941.996388] [<ffffffff8157e0c9>] ? smp_apic_timer_interrupt+0x39/0x50 [ 941.996388] [<ffffffff8157c3e2>] ? apic_timer_interrupt+0x82/0x90 [ 941.996388] <EOI> [<ffffffff811657cf>] ? find_get_entries+0x4f/0x170 [ 941.996388] [<ffffffff81165865>] ? find_get_entries+0xe5/0x170 [ 941.996388] [<ffffffff81173dba>] ? pagevec_lookup_entries+0x1a/0x30 [ 941.996388] [<ffffffff81174069>] ? invalidate_inode_pages2_range+0x99/0x460 [ 941.996388] [<ffffffffa025d1fc>] ? close_ctree+0x16c/0x360 [btrfs] [ 941.996388] [<ffffffff811de8d9>] ? generic_shutdown_super+0x69/0xf0 [ 941.996388] [<ffffffff811deb9e>] ? kill_anon_super+0xe/0x20 [ 941.996388] [<ffffffffa0230f23>] ? btrfs_kill_super+0x13/0x100 [btrfs] [ 941.996388] [<ffffffff811decf4>] ? deactivate_locked_super+0x34/0x60 [ 941.996388] [<ffffffff811fae5b>] ? cleanup_mnt+0x3b/0x80 [ 941.996388] [<ffffffff81090791>] ? task_work_run+0x71/0x90 [ 941.996388] [<ffffffff8100330a>] ? exit_to_usermode_loop+0xba/0xc0 [ 941.996388] [<ffffffff81003b25>] ? syscall_return_slowpath+0x45/0x50 [ 941.996388] [<ffffffff8157b87e>] ? entry_SYSCALL_64_fastpath+0xa6/0xa8 [ 968.184777] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [umount:3460] [ 968.184777] Modules linked in: cpufreq_userspace cpufreq_powersave cpufreq_stats cpufreq_conservative softdog nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc loop ipmi_devintf ipmi_msghandler joydev iTCO_wdt snd_pcm iTCO_vendor_support snd_timer snd psmouse lpc_ich soundcore mfd_core serio_raw ohci_pci evdev pcspkr ohci_hcd rng_core i2c_piix4 battery parport_pc 8250_fintek parport acpi_cpufreq video ac tpm_tis tpm button processor ext4 crc16 jbd2 mbcache crc32c_generic btrfs(O) xor raid6_pq dm_mod md_mod hid_generic usbhid hid xhci_pci xhci_hcd sg sr_mod cdrom sd_mod ata_generic ehci_pci ehci_hcd ahci usbcore ata_piix libahci libata usb_common scsi_mod e1000 [ 968.184777] CPU: 1 PID: 3460 Comm: umount Tainted: G B O 4.6.0-rc4-scst31x-debug-12+ #2 [ 968.184777] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 [ 968.184777] task: ffff88002b82adc0 ti: ffff880028e28000 task.ti: ffff880028e28000 [ 968.184777] RIP: 0010:[<ffffffff811657cf>] [<ffffffff811657cf>] find_get_entries+0x4f/0x170 [ 968.184777] RSP: 0018:ffff880028e2bc78 EFLAGS: 00000246 [ 968.184777] RAX: ffff88002b452028 RBX: 0000000000000008 RCX: 0000000000000000 [ 968.184777] RDX: 0000000000182040 RSI: ffff880028e2bc78 RDI: ffffea0000ae02c0 [ 968.184777] RBP: ffff88002b4a0f38 R08: 0000000000000000 R09: 0000000000000000 [ 968.184777] R10: 0000000000000000 R11: 0000000000000220 R12: ffff88002b452028 [ 968.184777] R13: 000000000000000e R14: ffff880028e2bd80 R15: ffff880028e2bd00 [ 968.184777] FS: 00007ff3d87537e0(0000) GS:ffff88002fd00000(0000) knlGS:0000000000000000 [ 968.184777] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 968.184777] CR2: 0000000000625208 CR3: 000000002efe6000 CR4: 00000000000006e0 [ 968.184777] Stack: [ 968.184777] 0000000000182000 0000000000182040 ffffea00009f4960 ffff880028e2bd70 [ 968.184777] ffffffffffffffff ffff880028e2bd70 ffff880028e2bdf0 ffff88002b4a0f30 [ 968.184777] ffffea0000a54640 ffffffff81173dba 00000000000021b4 ffffffff81174069 [ 968.184777] Call Trace: [ 968.184777] [<ffffffff81173dba>] ? pagevec_lookup_entries+0x1a/0x30 [ 968.184777] [<ffffffff81174069>] ? invalidate_inode_pages2_range+0x99/0x460 [ 968.184777] [<ffffffffa025d1fc>] ? close_ctree+0x16c/0x360 [btrfs] [ 968.184777] [<ffffffff811de8d9>] ? generic_shutdown_super+0x69/0xf0 [ 968.184777] [<ffffffff811deb9e>] ? kill_anon_super+0xe/0x20 [ 968.184777] [<ffffffffa0230f23>] ? btrfs_kill_super+0x13/0x100 [btrfs] [ 968.184777] [<ffffffff811decf4>] ? deactivate_locked_super+0x34/0x60 [ 968.184777] [<ffffffff811fae5b>] ? cleanup_mnt+0x3b/0x80 [ 968.184777] [<ffffffff81090791>] ? task_work_run+0x71/0x90 [ 968.184777] [<ffffffff8100330a>] ? exit_to_usermode_loop+0xba/0xc0 [ 968.184777] [<ffffffff81003b25>] ? syscall_return_slowpath+0x45/0x50 [ 968.184777] [<ffffffff8157b87e>] ? entry_SYSCALL_64_fastpath+0xa6/0xa8 [ 968.184777] Code: 45 31 e4 48 8d 6f 08 48 83 ec 18 48 c7 04 24 00 00 00 00 48 89 74 24 08 eb 76 40 f6 c7 03 0f 85 d5 00 00 00 44 8b 4f 1c 45 85 c9 <74> 68 41 8d 51 01 48 8d 4f 1c 44 89 c8 f0 0f b1 57 1c 41 39 c1 -- Yauhen Kharuzhy
test-replace-balance.sh
Description: Bourne shell script
