* Re: 8 disk metadata radi10 + data raid1
2017-08-17 20:41 8 disk metadata radi10 + data raid1 waxhead
@ 2017-08-17 22:05 ` Liu Bo
0 siblings, 0 replies; 2+ messages in thread
From: Liu Bo @ 2017-08-17 22:05 UTC (permalink / raw)
To: waxhead; +Cc: Btrfs BTRFS
On Thu, Aug 17, 2017 at 10:41:59PM +0200, waxhead wrote:
> Hi,
>
> On one of my machines I run a BTRFS filesystem with the following
> configuration
>
> Kernel: 4.11.0-1-amd64 #1 SMP Debian 4.11.6-1 (2017-06-19) x86_64 GNU/Linux
> Disks: 8
> Metadata: Raid 10
> Data: Raid1
>
> One of the disks is going bad , and while the system still runs fine I ran
> some md5sum's on a few files and hit this bug.
>
> Currently the only non-zero output from btrfs de st / is about 270000
> write_io_errs and 278000 read_io_errs
>
> I do have backups (hah! you did not expect that Duncan did you!)
> and the data is not important on this filesystem.
> Even if I got thrown the below stuff in dmesg the system keeps running fine.
>
> ...the failed device disappeared as of writing this... so now the filesystem
> have one missing device.
This might be caused by a rare corner case as there're regression
tests for raid1's read-retry in fstests which got tested every round.
Wonder if you could try this debug patch(which tells us how mirror got changed)?
thanks,
-liubo
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 0aff9b278c19..f273127127cf 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2301,6 +2301,8 @@ bool btrfs_check_repairable(struct inode *inode, struct bio *failed_bio,
* everything for repair_io_failure to do the rest for us.
*/
if (failrec->in_validation) {
+ if (failrec->this_mirror != failed_mirror)
+ pr_info("%s: logical 0x%llx this_mirror %d failed %d\n", __func__, btrfs_io_bio(failed_bio)->logical, failrec->this_mirror, failed_mirror);
BUG_ON(failrec->this_mirror != failed_mirror);
failrec->in_validation = 0;
failrec->this_mirror = 0;
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index e8b9a269fdde..0e9eefdb94b0 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -6091,6 +6091,7 @@ static void btrfs_end_bio(struct bio *bio)
*/
if (atomic_read(&bbio->error) > bbio->max_errors) {
bio->bi_status = BLK_STS_IOERR;
+ pr_info("%s: logical 0x%llx failed_mirror %d\n", __func__, btrfs_io_bio(bio)->logical, bbio->mirror_num);
} else {
/*
* this bio is actually up to date, we didn't
@@ -6206,6 +6207,8 @@ static void bbio_error(struct btrfs_bio *bbio, struct bio *bio, u64 logical)
WARN_ON(bio != bbio->orig_bio);
btrfs_io_bio(bio)->mirror_num = bbio->mirror_num;
+ pr_info("%s: logical 0x%llx failed_mirror %d\n", __func__, btrfs_io_bio(bio)->logical, bbio->mirror_num);
+
bio->bi_iter.bi_sector = logical >> 9;
bio->bi_status = BLK_STS_IOERR;
btrfs_end_bbio(bbio, bio);
>
> ---snip--- ( https://pastebin.ca/3856147 )
> [120678.569637] ? worker_thread+0x4d/0x490
> [120678.570931] ? kthread+0xfc/0x130
> [120678.572206] ? process_one_work+0x430/0x430
> [120678.573480] ? kthread_create_on_node+0x70/0x70
> [120678.574756] ? do_group_exit+0x3a/0xa0
> [120678.576024] ? ret_from_fork+0x26/0x40
> [120678.577287] Code: 00 00 c7 43 28 00 00 00 00 b9 01 00 00 00 31 c0 eb d8
> 8d 48 02 eb da 41 89 e8 48 c7 c6 d8 67 4a c0 4c 89 e7 e8 c0 b9 fa ff eb 80
> <0f> 0b 66 90 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 41 57
> [120678.580003] RIP: btrfs_check_repairable+0xe2/0xf0 [btrfs] RSP:
> ffffac3a419ffd60
> [120678.581377] ------------[ cut here ]------------
> [120678.581526] ---[ end trace 1f2b98046a799b47 ]---
> [120678.584109] kernel BUG at
> /build/linux-C5oXKu/linux-4.11.6/fs/btrfs/extent_io.c:2315!
> [120678.585477] invalid opcode: 0000 [#5] SMP
> [120678.586821] Modules linked in: ebtable_filter ebtables ip6table_filter
> ip6_tables iptable_filter cpufreq_userspace cpufreq_powersave
> cpufreq_conservative intel_powerclamp iTCO_wdt iTCO_vendor_support coretemp
> kvm_intel cdc_ether usbnet mii kvm joydev mgag200 ttm irqbypass intel_cstate
> evdev intel_uncore drm_kms_helper drm pcspkr i2c_algo_bit lpc_ich mfd_core
> ioatdma sg ipmi_si ipmi_devintf dca ipmi_msghandler i7core_edac button
> edac_core i5500_temp shpchp acpi_cpufreq binfmt_misc ip_tables x_tables
> autofs4 btrfs crc32c_generic xor raid6_pq sd_mod hid_generic usbhid hid
> sr_mod cdrom ata_generic crc32c_intel ata_piix i2c_i801 libata mptsas
> ehci_pci scsi_transport_sas uhci_hcd mptscsih mptbase ehci_hcd scsi_mod
> usbcore usb_common bnx2
> [120678.595485] CPU: 0 PID: 15305 Comm: kworker/u32:3 Tainted: G D I
> 4.11.0-1-amd64 #1 Debian 4.11.6-1
> [120678.596960] Hardware name: IBM Lenovo ThinkServer RD220
> -[379811G]-/59Y3827 , BIOS -[D6EL28AUS-1.03]- 08/20/2009
> [120678.598476] Workqueue: btrfs-endio btrfs_endio_helper [btrfs]
> [120678.599943] task: ffff9a4dc7bd6d40 task.stack: ffffac3a44214000
> [120678.601431] RIP: 0010:btrfs_check_repairable+0xe2/0xf0 [btrfs]
> [120678.602867] RSP: 0000:ffffac3a44217d60 EFLAGS: 00010297
> [120678.604271] RAX: 0000000000000001 RBX: ffff9a4daa28e080 RCX:
> 0000000000000000
> [120678.605660] RDX: 0000000000000002 RSI: 0000000000000000 RDI:
> ffff9a4de67d6e18
> [120678.607017] RBP: 0000000000000001 R08: 00000dbbb2240000 R09:
> 00000dbbf2240000
> [120678.608344] R10: 0000000000000000 R11: 00000000fffffffb R12:
> ffff9a4de67d6000
> [120678.609641] R13: ffff9a4cfea6dda8 R14: ffff9a4cfea6dda8 R15:
> 0000000000000000
> [120678.610921] FS: 0000000000000000(0000) GS:ffff9a4def200000(0000)
> knlGS:0000000000000000
> [120678.612190] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [120678.613435] CR2: 00005627a2d96ff0 CR3: 000000039310f000 CR4:
> 00000000000006f0
> [120678.614687] Call Trace:
> [120678.615965] ? end_bio_extent_readpage+0x42e/0x580 [btrfs]
> [120678.617244] ? btrfs_scrubparity_helper+0xcf/0x300 [btrfs]
> [120678.618488] ? process_one_work+0x197/0x430
> [120678.619728] ? worker_thread+0x4d/0x490
> [120678.620960] ? kthread+0xfc/0x130
> [120678.622185] ? process_one_work+0x430/0x430
> [120678.623408] ? kthread_create_on_node+0x70/0x70
> [120678.624620] ? do_group_exit+0x3a/0xa0
> [120678.625817] ? ret_from_fork+0x26/0x40
> [120678.626994] Code: 00 00 c7 43 28 00 00 00 00 b9 01 00 00 00 31 c0 eb d8
> 8d 48 02 eb da 41 89 e8 48 c7 c6 d8 67 4a c0 4c 89 e7 e8 c0 b9 fa ff eb 80
> <0f> 0b 66 90 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 41 57
> [120678.629525] RIP: btrfs_check_repairable+0xe2/0xf0 [btrfs] RSP:
> ffffac3a44217d60
> [120678.630795] ------------[ cut here ]------------
> [120678.630839] ---[ end trace 1f2b98046a799b48 ]---
> [120678.633382] kernel BUG at
> /build/linux-C5oXKu/linux-4.11.6/fs/btrfs/extent_io.c:2315!
> [120678.634625] invalid opcode: 0000 [#6] SMP
> [120678.635820] Modules linked in: ebtable_filter ebtables ip6table_filter
> ip6_tables iptable_filter cpufreq_userspace cpufreq_powersave
> cpufreq_conservative intel_powerclamp iTCO_wdt iTCO_vendor_support coretemp
> kvm_intel cdc_ether usbnet mii kvm joydev mgag200 ttm irqbypass intel_cstate
> evdev intel_uncore drm_kms_helper drm pcspkr i2c_algo_bit lpc_ich mfd_core
> ioatdma sg ipmi_si ipmi_devintf dca ipmi_msghandler i7core_edac button
> edac_core i5500_temp shpchp acpi_cpufreq binfmt_misc ip_tables x_tables
> autofs4 btrfs crc32c_generic xor raid6_pq sd_mod hid_generic usbhid hid
> sr_mod cdrom ata_generic crc32c_intel ata_piix i2c_i801 libata mptsas
> ehci_pci scsi_transport_sas uhci_hcd mptscsih mptbase ehci_hcd scsi_mod
> usbcore usb_common bnx2
> [120678.643664] CPU: 1 PID: 15318 Comm: kworker/u32:5 Tainted: G D I
> 4.11.0-1-amd64 #1 Debian 4.11.6-1
> [120678.645017] Hardware name: IBM Lenovo ThinkServer RD220
> -[379811G]-/59Y3827 , BIOS -[D6EL28AUS-1.03]- 08/20/2009
> [120678.646437] Workqueue: btrfs-endio btrfs_endio_helper [btrfs]
> [120678.647808] task: ffff9a4dcf809240 task.stack: ffffac3a43e14000
> [120678.649192] RIP: 0010:btrfs_check_repairable+0xe2/0xf0 [btrfs]
> [120678.650530] RSP: 0000:ffffac3a43e17d60 EFLAGS: 00010297
> [120678.651838] RAX: 0000000000000001 RBX: ffff9a4daa28ec80 RCX:
> 0000000000000000
> [120678.653134] RDX: 0000000000000002 RSI: 0000000000000000 RDI:
> ffff9a4de67d6e18
> [120678.654403] RBP: 0000000000000001 R08: 00000dbbb2240000 R09:
> 00000dbbf2240000
> [120678.655644] R10: 0000000000000000 R11: 00000000fffffffb R12:
> ffff9a4de67d6000
> [120678.656853] R13: ffff9a4de4aa7728 R14: ffff9a4de4aa7728 R15:
> 0000000000000000
> [120678.658043] FS: 0000000000000000(0000) GS:ffff9a4def240000(0000)
> knlGS:0000000000000000
> [120678.659227] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [120678.660386] CR2: 00007f335364dd3c CR3: 000000039310f000 CR4:
> 00000000000006e0
> [120678.661559] Call Trace:
> [120678.662752] ? end_bio_extent_readpage+0x42e/0x580 [btrfs]
> [120678.663944] ? btrfs_scrubparity_helper+0xcf/0x300 [btrfs]
> [120678.665105] ? process_one_work+0x197/0x430
> [120678.666260] ? worker_thread+0x4d/0x490
> [120678.667410] ? kthread+0xfc/0x130
> [120678.668557] ? process_one_work+0x430/0x430
> [120678.669698] ? kthread_create_on_node+0x70/0x70
> [120678.670825] ? do_group_exit+0x3a/0xa0
> [120678.671939] ? ret_from_fork+0x26/0x40
> [120678.673037] Code: 00 00 c7 43 28 00 00 00 00 b9 01 00 00 00 31 c0 eb d8
> 8d 48 02 eb da 41 89 e8 48 c7 c6 d8 67 4a c0 4c 89 e7 e8 c0 b9 fa ff eb 80
> <0f> 0b 66 90 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 41 57
> [120678.675384] RIP: btrfs_check_repairable+0xe2/0xf0 [btrfs] RSP:
> ffffac3a43e17d60
> [120678.676613] ---[ end trace 1f2b98046a799b49 ]---
> [120702.863359] btrfs_dev_stat_print_on_error: 252 callbacks suppressed
> [120702.863367] BTRFS error (device sda1): bdev /dev/sda1 errs: wr 270268,
> rd 278596, flush 0, corrupt 0, gen 0
> [120702.863491] BTRFS error (device sda1): bdev /dev/sda1 errs: wr 270269,
> rd 278596, flush 0, corrupt 0, gen 0
> [120702.863604] BTRFS error (device sda1): bdev /dev/sda1 errs: wr 270270,
> rd 278596, flush 0, corrupt 0, gen 0
> [120702.863716] BTRFS error (device sda1): bdev /dev/sda1 errs: wr 270271,
> rd 278596, flush 0, corrupt 0, gen 0
> [120702.863839] BTRFS error (device sda1): bdev /dev/sda1 errs: wr 270272,
> rd 278596, flush 0, corrupt 0, gen 0
> [120703.353885] BTRFS warning (device sda1): lost page write due to IO error
> on /dev/sda1
> [120703.353893] BTRFS error (device sda1): bdev /dev/sda1 errs: wr 270273,
> rd 278596, flush 0, corrupt 0, gen 0
> [120703.353900] BTRFS warning (device sda1): lost page write due to IO error
> on /dev/sda1
> [120703.353903] BTRFS error (device sda1): bdev /dev/sda1 errs: wr 270274,
> rd 278596, flush 0, corrupt 0, gen 0
> [120703.353909] BTRFS warning (device sda1): lost page write due to IO error
> on /dev/sda1
> [120703.353911] BTRFS error (device sda1): bdev /dev/sda1 errs: wr 270275,
> rd 278596, flush 0, corrupt 0, gen 0
> ---snap---
>
> --
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