Hello folks
Seems I hit one issue that task blocked issue on 4.7.0 during write journal testing, could anyone help check it?
I have list the log and reproduce steps below, thanks.
Log:
[ 106.688135] md: bind<sdb1>
[ 106.688301] md: bind<sdc1>
[ 106.689831] md: bind<sdd1>
[ 106.689897] md: bind<sdf1>
[ 106.710079] md: bind<sde1>
[ 106.804284] raid6: sse2x1 gen() 6707 MB/s
[ 106.821281] raid6: sse2x1 xor() 5667 MB/s
[ 106.838284] raid6: sse2x2 gen() 8875 MB/s
[ 106.855282] raid6: sse2x2 xor() 6230 MB/s
[ 106.872278] raid6: sse2x4 gen() 10359 MB/s
[ 106.889278] raid6: sse2x4 xor() 7697 MB/s
[ 106.889280] raid6: using algorithm sse2x4 gen() 10359 MB/s
[ 106.889281] raid6: .... xor() 7697 MB/s, rmw enabled
[ 106.889282] raid6: using ssse3x2 recovery algorithm
[ 106.907347] async_tx: api initialized (async)
[ 106.924571] xor: automatically using best checksumming function:
[ 106.934274] avx : 19356.000 MB/sec
[ 107.036697] md: raid6 personality registered for level 6
[ 107.036699] md: raid5 personality registered for level 5
[ 107.036700] md: raid4 personality registered for level 4
[ 107.037215] md/raid:md0: device sdd1 operational as raid disk 2
[ 107.037217] md/raid:md0: device sdc1 operational as raid disk 1
[ 107.037218] md/raid:md0: device sdb1 operational as raid disk 0
[ 107.037508] md/raid:md0: allocated 4374kB
[ 107.037533] md/raid:md0: raid level 5 active with 3 out of 4 devices, algorithm 2
[ 107.037534] RAID conf printout:
[ 107.037535] --- level:5 rd:4 wd:3
[ 107.037536] disk 0, o:1, dev:sdb1
[ 107.037537] disk 1, o:1, dev:sdc1
[ 107.037538] disk 2, o:1, dev:sdd1
[ 107.037548] md/raid:md0: using device sdf1 as journal
[ 107.037829] md0: detected capacity change from 0 to 32187088896
[ 107.037849] RAID conf printout:
[ 107.037853] --- level:5 rd:4 wd:3
[ 107.037855] disk 0, o:1, dev:sdb1
[ 107.037857] disk 1, o:1, dev:sdc1
[ 107.037858] disk 2, o:1, dev:sdd1
[ 107.037860] disk 3, o:1, dev:sde1
[ 107.037945] md: recovery of RAID array md0
[ 107.037948] md: minimum _guaranteed_ speed: 1000 KB/sec/disk.
[ 107.037949] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for recovery.
[ 107.037954] md: using 128k window, over a total of 10477568k.
[ 216.232974] md: md0: recovery done.
[ 216.431212] RAID conf printout:
[ 216.431216] --- level:5 rd:4 wd:4
[ 216.431218] disk 0, o:1, dev:sdb1
[ 216.431219] disk 1, o:1, dev:sdc1
[ 216.431220] disk 2, o:1, dev:sdd1
[ 216.431221] disk 3, o:1, dev:sde1
[ 222.897854] md/raid:md0: Disk failure on sdf1, disabling device.
md/raid:md0: Operation continuing on 4 devices.
[ 223.174949] RAID conf printout:
[ 223.174952] --- level:5 rd:4 wd:4
[ 223.174953] disk 0, o:1, dev:sdb1
[ 223.174954] disk 1, o:1, dev:sdc1
[ 223.174955] disk 2, o:1, dev:sdd1
[ 223.174956] disk 3, o:1, dev:sde1
[ 241.640253] md: unbind<sdf1>
[ 241.643448] md: export_rdev(sdf1)
[ 261.329087] md: bind<sdf1>
[ 261.607691] RAID conf printout:
[ 261.607694] --- level:5 rd:4 wd:4
[ 261.607695] disk 0, o:1, dev:sdb1
[ 261.607696] disk 1, o:1, dev:sdc1
[ 261.607697] disk 2, o:1, dev:sdd1
[ 261.607698] disk 3, o:1, dev:sde1
[ 292.581113] RAID conf printout:
[ 292.581116] --- level:5 rd:5 wd:5
[ 292.581118] disk 0, o:1, dev:sdb1
[ 292.581119] disk 1, o:1, dev:sdc1
[ 292.581120] disk 2, o:1, dev:sdd1
[ 292.581121] disk 3, o:1, dev:sde1
[ 292.581121] disk 4, o:1, dev:sdf1
[ 292.581199] md: reshape of RAID array md0
[ 292.581202] md: minimum _guaranteed_ speed: 1000 KB/sec/disk.
[ 292.581204] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for reshape.
[ 292.581214] md: using 128k window, over a total of 10477568k.
[ 1201.734199] INFO: task systemd-udevd:794 blocked for more than 600 seconds.
[ 1201.734204] Not tainted 4.7.0 #5
[ 1201.734204] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1201.734206] systemd-udevd D ffff8800310a77b0 0 794 1 0x00000000
[ 1201.734209] ffff8800310a77b0 0000000000000001 ffff880031de0000 ffff8807cd3c5688
[ 1201.734211] ffff8800310a8000 0000000000000000 0000000000000002 ffff8807c3e4c100
[ 1201.734213] 0000000000000000 ffff8800310a77c8 ffffffff816e4935 ffff8807cd3c5400
[ 1201.734214] Call Trace:
[ 1201.734220] [<ffffffff816e4935>] schedule+0x35/0x80
[ 1201.734226] [<ffffffffa09a0ba9>] raid5_make_request+0x8b9/0xce0 [raid456]
[ 1201.734229] [<ffffffff810d0240>] ? prepare_to_wait_event+0xf0/0xf0
[ 1201.734233] [<ffffffff8156758e>] md_make_request+0xee/0x230
[ 1201.734236] [<ffffffff81320803>] generic_make_request+0x103/0x1d0
[ 1201.734237] [<ffffffff81320947>] submit_bio+0x77/0x150
[ 1201.734240] [<ffffffff813183bb>] ? bio_alloc_bioset+0x1ab/0x2d0
[ 1201.734242] [<ffffffff81254ecd>] ? alloc_page_buffers+0x5d/0xb0
[ 1201.734244] [<ffffffff81256a1f>] submit_bh_wbc+0x12f/0x160
[ 1201.734246] [<ffffffff81256d58>] block_read_full_page+0x208/0x380
[ 1201.734248] [<ffffffff81259000>] ? I_BDEV+0x20/0x20
[ 1201.734250] [<ffffffff812597e8>] blkdev_readpage+0x18/0x20
[ 1201.734253] [<ffffffff81197718>] do_read_cache_page+0x138/0x300
[ 1201.734255] [<ffffffff812597d0>] ? blkdev_writepages+0x40/0x40
[ 1201.734257] [<ffffffff811978f9>] read_cache_page+0x19/0x20
[ 1201.734259] [<ffffffff81333b50>] read_dev_sector+0x80/0xb0
[ 1201.734261] [<ffffffff81337f14>] read_lba+0x104/0x1c0
[ 1201.734263] [<ffffffff8133852a>] find_valid_gpt+0xfa/0x710
[ 1201.734266] [<ffffffff811d7d00>] ? vmap_page_range_noflush+0x190/0x380
[ 1201.734267] [<ffffffff81338b40>] ? find_valid_gpt+0x710/0x710
[ 1201.734269] [<ffffffff81338bc9>] efi_partition+0x89/0x440
[ 1201.734271] [<ffffffff81359209>] ? snprintf+0x49/0x70
[ 1201.734273] [<ffffffff81338b40>] ? find_valid_gpt+0x710/0x710
[ 1201.734275] [<ffffffff81335b31>] check_partition+0x101/0x1f0
[ 1201.734277] [<ffffffff81334462>] rescan_partitions+0xc2/0x2c0
[ 1201.734279] [<ffffffff8132f294>] __blkdev_reread_part+0x64/0x70
[ 1201.734281] [<ffffffff8132f2c3>] blkdev_reread_part+0x23/0x40
[ 1201.734282] [<ffffffff8132fd3a>] blkdev_ioctl+0x46a/0x8f0
[ 1201.734284] [<ffffffff81259aa1>] block_ioctl+0x41/0x50
[ 1201.734286] [<ffffffff812323b6>] do_vfs_ioctl+0xa6/0x5c0
[ 1201.734288] [<ffffffff81232949>] SyS_ioctl+0x79/0x90
[ 1201.734290] [<ffffffff81274d67>] ? SyS_flock+0x117/0x1a0
[ 1201.734292] [<ffffffff816e86b2>] entry_SYSCALL_64_fastpath+0x1a/0xa4
[ 1201.734305] INFO: task md0_reshape:4089 blocked for more than 600 seconds.
[ 1201.734306] Not tainted 4.7.0 #5
[ 1201.734307] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1201.734308] md0_reshape D ffff88080db77ac0 0 4089 2 0x00000080
[ 1201.734310] ffff88080db77ac0 0000000000000000 ffff8807d6724380 ffff8807cd3c5670
[ 1201.734311] ffff88080db78000 ffff88080db77b20 ffff8807cd3c5670 0000000000000c20
[ 1201.734313] ffff8807cd3c5418 ffff88080db77ad8 ffffffff816e4935 ffff8807cd3c5400
[ 1201.734314] Call Trace:
[ 1201.734316] [<ffffffff816e4935>] schedule+0x35/0x80
[ 1201.734319] [<ffffffffa099fe8b>] raid5_get_active_stripe+0x20b/0x670 [raid456]
[ 1201.734321] [<ffffffff810d0240>] ? prepare_to_wait_event+0xf0/0xf0
[ 1201.734323] [<ffffffffa09a4733>] reshape_request+0x4d3/0x8a0 [raid456]
[ 1201.734326] [<ffffffffa09a4e21>] raid5_sync_request+0x321/0x3a0 [raid456]
[ 1201.734327] [<ffffffff810cfc54>] ? __wake_up+0x44/0x50
[ 1201.734329] [<ffffffff8156ce97>] md_do_sync+0x9e7/0xf60
[ 1201.734332] [<ffffffff810c200d>] ? update_curr+0xed/0x180
[ 1201.734333] [<ffffffff810c025e>] ? account_entity_dequeue+0xae/0xd0
[ 1201.734336] [<ffffffff81098d43>] ? kernel_sigaction+0x43/0xe0
[ 1201.734339] [<ffffffff81566dc6>] md_thread+0x136/0x150
[ 1201.734341] [<ffffffff81566c90>] ? find_pers+0x70/0x70
[ 1201.734343] [<ffffffff810ab678>] kthread+0xd8/0xf0
[ 1201.734344] [<ffffffff816e88bf>] ret_from_fork+0x1f/0x40
[ 1201.734346] [<ffffffff810ab5a0>] ? kthread_park+0x60/0x60
Reproduce steps:
#mdadm -CR /dev/md0 -l5 -n4 /dev/sd[b-e]1 --write-journal /dev/sdf1
#mdadm --wait /dev/md0
#mdadm /dev/md0 -f /dev/sdf1
#mdadm /dev/md0 -r /dev/sdf1
#mdadm /dev/md0 -a /dev/sdf1
#mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Thu Aug 4 20:37:41 2016
Raid Level : raid5
Array Size : 31432704 (29.98 GiB 32.19 GB)
Used Dev Size : 10477568 (9.99 GiB 10.73 GB)
Raid Devices : 4
Total Devices : 5
Persistence : Superblock is persistent
Update Time : Thu Aug 4 20:40:16 2016
State : clean
Active Devices : 4
Working Devices : 5
Failed Devices : 0
Spare Devices : 1
Layout : left-symmetric
Chunk Size : 512K
Name : dhcp-12-125.nay.redhat.com:0 (local to host dhcp-12-125.nay.redhat.com)
UUID : 09607542:a8dccc81:f5d2f80c:c586923f
Events : 22
Number Major Minor RaidDevice State
0 8 17 0 active sync /dev/sdb1
1 8 33 1 active sync /dev/sdc1
2 8 49 2 active sync /dev/sdd1
5 8 65 3 active sync /dev/sde1
4 8 81 - spare /dev/sdf1
#mdadm -G -n5 /dev/md0
Best Regards,
Yi Zhang
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