I tried with latest Linus's tree
(731c7d3a205ba89b475b2aa71b5f13dd6ae3de56), but still can't find the
warning.
linux241:~ # uname -r
4.7.0-11-default+
linux241:~ # mdadm --version
mdadm - v3.4-41-gf96b130 - 30th March 2016
The biggest difference is that I am using VM machine while you were
testing with real hardware, though I am not
sure it was caused by hardware or not. Do you always see the "couldn't
update array info" info during test? If so,
pls try to make it disappear.
Thanks,
Guoqing
May be it's env related, I have tried on another PC which with the same
kernel/mdadm version and cannot reproduce it.
Below is one log I reproduced which without " couldn't update array info"'
[ 504.650453] md: bind<sdb1>
[ 504.650539] md: bind<sdd1>
[ 504.650611] md: bind<sde1>
[ 504.651137] md: bind<sdc1>
[ 504.651211] md: bind<sdf1>
[ 504.655535] md/raid:md0: device sde1 operational as raid disk 2
[ 504.655537] md/raid:md0: device sdd1 operational as raid disk 1
[ 504.655538] md/raid:md0: device sdb1 operational as raid disk 0
[ 504.656040] md/raid:md0: allocated 4374kB
[ 504.656069] md/raid:md0: raid level 4 active with 3 out of 4 devices,
algorithm 0
[ 504.656071] RAID conf printout:
[ 504.656085] --- level:4 rd:4 wd:3
[ 504.656086] disk 0, o:1, dev:sdb1
[ 504.656087] disk 1, o:1, dev:sdd1
[ 504.656088] disk 2, o:1, dev:sde1
[ 504.656107] md/raid:md0: using device sdc1 as journal
[ 504.658052] created bitmap (1 pages) for device md0
[ 504.658124] md0: bitmap initialized from disk: read 1 pages, set 16
of 16 bits
[ 504.667007] md0: detected capacity change from 0 to 3221225472
[ 504.667032] RAID conf printout:
[ 504.667035] --- level:4 rd:4 wd:3
[ 504.667037] disk 0, o:1, dev:sdb1
[ 504.667039] disk 1, o:1, dev:sdd1
[ 504.667041] disk 2, o:1, dev:sde1
[ 504.667042] disk 3, o:1, dev:sdf1
[ 504.667156] md: recovery of RAID array md0
[ 504.667159] md: minimum _guaranteed_ speed: 1000 KB/sec/disk.
[ 504.667160] md: using maximum available idle IO bandwidth (but not
more than 200000 KB/sec) for recovery.
[ 504.667165] md: using 128k window, over a total of 1048576k.
[ 516.581223] md: md0: recovery done.
[ 516.678940] RAID conf printout:
[ 516.678943] --- level:4 rd:4 wd:4
[ 516.678945] disk 0, o:1, dev:sdb1
[ 516.678946] disk 1, o:1, dev:sdd1
[ 516.678947] disk 2, o:1, dev:sde1
[ 516.678948] disk 3, o:1, dev:sdf1
[ 517.694241] md/raid:md0: Disk failure on sdb1, disabling device.
md/raid:md0: Operation continuing on 3 devices.
[ 517.734547] RAID conf printout:
[ 517.734549] --- level:4 rd:4 wd:3
[ 517.734551] disk 0, o:0, dev:sdb1
[ 517.734552] disk 1, o:1, dev:sdd1
[ 517.734553] disk 2, o:1, dev:sde1
[ 517.734554] disk 3, o:1, dev:sdf1
[ 517.737295] RAID conf printout:
[ 517.737298] --- level:4 rd:4 wd:3
[ 517.737299] disk 1, o:1, dev:sdd1
[ 517.737300] disk 2, o:1, dev:sde1
[ 517.737301] disk 3, o:1, dev:sdf1
[ 522.695241] md: unbind<sdb1>
[ 522.698393] md: export_rdev(sdb1)
[ 523.277566] md: bind<sdb1>
[ 523.333573] RAID conf printout:
[ 523.333576] --- level:4 rd:4 wd:3
[ 523.333577] disk 0, o:1, dev:sdb1
[ 523.333578] disk 1, o:1, dev:sdd1
[ 523.333579] disk 2, o:1, dev:sde1
[ 523.333580] disk 3, o:1, dev:sdf1
[ 523.379453] ------------[ cut here ]------------
[ 523.379462] WARNING: CPU: 0 PID: 5186 at drivers/md/raid5-cache.c:728
r5l_do_reclaim+0x415/0x430 [raid456]
[ 523.379463] Modules linked in: raid456 async_raid6_recov async_memcpy
async_pq async_xor xor async_tx raid6_pq xt_CHECKSUM ipt_MASQUERADE
nf_nat_masquerade_ipv4 tun ipt_REJECT nf_reject_ipv4 ip6t_rpfilter
ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat
ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6
nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security
ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4
nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw
ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter
sb_edac edac_core snd_hda_codec_hdmi x86_pkg_temp_thermal
snd_hda_codec_realtek intel_powerclamp coretemp snd_hda_codec_generic
snd_hda_intel kvm_intel snd_hda_codec kvm snd_hda_core snd_hwdep snd_seq
snd_seq_device
[ 523.379488] irqbypass snd_pcm crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper
cryptd snd_timer iTCO_wdt hp_wmi snd sparse_keymap ioatdma rfkill
iTCO_vendor_support sg pcspkr shpchp soundcore mei_me i2c_i801 dca mei
lpc_ich mfd_core tpm_infineon nfsd auth_rpcgss nfs_acl lockd grace
sunrpc ip_tables xfs libcrc32c sd_mod nouveau video mxm_wmi i2c_algo_bit
drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm isci
drm libsas e1000e ata_generic ahci pata_acpi scsi_transport_sas libahci
libata firewire_ohci firewire_core crc32c_intel serio_raw ptp pps_core
crc_itu_t i2c_core wmi fjes dm_mirror dm_region_hash dm_log dm_mod
[ 523.379520] CPU: 0 PID: 5186 Comm: md0_resync Tainted: G W 4.7.0 #5
[ 523.379521] Hardware name: Hewlett-Packard HP Z620 Workstation/158A,
BIOS J61 v03.69 03/25/2014
[ 523.379522] 0000000000000286 00000000277f1813 ffff880801c5fb40
ffffffff8134cd0c
[ 523.379524] 0000000000000000 0000000000000000 ffff880801c5fb80
ffffffff8108c351
[ 523.379526] 000002d8c7a96d80 0000000023f0d6c6 ffff8800c6dc8000
ffff8807f334be88
[ 523.379528] Call Trace:
[ 523.379533] [<ffffffff8134cd0c>] dump_stack+0x63/0x87
[ 523.379537] [<ffffffff8108c351>] __warn+0xd1/0xf0
[ 523.379539] [<ffffffff8108c48d>] warn_slowpath_null+0x1d/0x20
[ 523.379542] [<ffffffffa0995805>] r5l_do_reclaim+0x415/0x430 [raid456]
[ 523.379546] [<ffffffff811f9d00>] ? kfree+0x120/0x170
[ 523.379548] [<ffffffffa099633b>] r5l_quiesce+0x7b/0xa0 [raid456]
[ 523.379551] [<ffffffffa0988da0>] raid5_quiesce+0x50/0x2a0 [raid456]
[ 523.379553] [<ffffffff810d0240>] ? prepare_to_wait_event+0xf0/0xf0
[ 523.379556] [<ffffffff8156d32e>] md_do_sync+0xe7e/0xf60
[ 523.379560] [<ffffffff81036bf9>] ? sched_clock+0x9/0x10
[ 523.379562] [<ffffffff810bc4b2>] ? sched_clock_cpu+0x72/0xa0
[ 523.379564] [<ffffffff810c3985>] ? put_prev_entity+0x35/0x730
[ 523.379567] [<ffffffff8102c6d9>] ? __switch_to+0x219/0x5c0
[ 523.379570] [<ffffffff81098d43>] ? kernel_sigaction+0x43/0xe0
[ 523.379572] [<ffffffff81566dc6>] md_thread+0x136/0x150
[ 523.379575] [<ffffffff81566c90>] ? find_pers+0x70/0x70
[ 523.379577] [<ffffffff810ab678>] kthread+0xd8/0xf0
[ 523.379580] [<ffffffff816e88bf>] ret_from_fork+0x1f/0x40
[ 523.379582] [<ffffffff810ab5a0>] ? kthread_park+0x60/0x60
[ 523.379583] ---[ end trace 76fe4588f24ee7b5 ]---
[ 523.429860] md: recovery of RAID array md0
[ 523.429862] md: minimum _guaranteed_ speed: 1000 KB/sec/disk.
[ 523.429864] md: using maximum available idle IO bandwidth (but not
more than 200000 KB/sec) for recovery.
[ 523.429876] md: using 128k window, over a total of 1048576k.
[ 523.429882] md: md0: recovery interrupted.
[ 523.501621] md: md0 still in use.
[ 523.501629] RAID conf printout:
[ 523.501632] --- level:4 rd:4 wd:3
[ 523.501634] disk 0, o:1, dev:sdb1
[ 523.501635] disk 1, o:1, dev:sdd1
[ 523.501636] disk 2, o:1, dev:sde1
[ 523.501637] disk 3, o:1, dev:sdf1
[ 523.501638] RAID conf printout:
[ 523.501638] --- level:4 rd:4 wd:3
[ 523.501639] disk 0, o:1, dev:sdb1
[ 523.501640] disk 1, o:1, dev:sdd1
[ 523.501641] disk 2, o:1, dev:sde1
[ 523.501642] disk 3, o:1, dev:sdf1
[ 523.501737] md: recovery of RAID array md0
[ 523.501740] md: minimum _guaranteed_ speed: 1000 KB/sec/disk.
[ 523.501741] md: using maximum available idle IO bandwidth (but not
more than 200000 KB/sec) for recovery.
[ 523.501745] md: using 128k window, over a total of 1048576k.
[ 523.501746] md: resuming recovery of md0 from checkpoint.
[ 523.501768] md: md0: recovery done.
[ 523.534961] RAID conf printout:
[ 523.534964] --- level:4 rd:4 wd:4
[ 523.534966] disk 0, o:1, dev:sdb1
[ 523.534967] disk 1, o:1, dev:sdd1
[ 523.534968] disk 2, o:1, dev:sde1
[ 523.534969] disk 3, o:1, dev:sdf1
[ 523.725191] md0: detected capacity change from 3221225472 to 0
[ 523.725282] md: md0 stopped.
[ 523.725286] md: unbind<sdb1>
[ 523.740217] md: export_rdev(sdb1)
[ 523.740226] md: unbind<sdf1>
[ 523.746268] md: export_rdev(sdf1)
[ 523.746284] md: unbind<sdc1>
[ 523.753263] md: export_rdev(sdc1)
[ 523.753278] md: unbind<sde1>
[ 523.759267] md: export_rdev(sde1)
[ 523.759282] md: unbind<sdd1>
[ 523.765299] md: export_rdev(sdd1)
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