Re: LVM RAID: task mdX_raid1:221 blocked for more than 120 seconds
From: Zdenek Kabelac <hidden>
Date: 2018-11-26 11:40:40
Dne 26. 11. 18 v 12:31 Cesare Leonardi napsal(a):
Resending, I erroneusly replied only to Zdenek, sorry. I can provide details about this, that was filed by me: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=913119 It's about a desktop PC, with two SSD (Samsung 850 EVO) on which i build RAID1 using LVM. # pvs PV VG Fmt Attr PSize PFree /dev/sdb3 vg0 lvm2 a-- <250,00g 15,98g /dev/sdc3 vg0 lvm2 a-- <250,00g 15,98g # lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert home vg0 rwi-aor--- 200,00g 100,00 root vg0 rwi-aor--- 30,00g 100,00 swap0 vg0 rwi-aor--- 4,00g 100,00 It's a desktop PC using Debian unstable, so it's rebooted quite often due to frequent updates.
So you should probably start first with running latest available kernel - 4.19. You also should collect 'dmesg' report
The freezes happens during normal work, without any resizing or any maintenance on LVM going on. Most of the time I noted the freeze while I was using Thunderbird. But eventually they resolve by themself: I wait minutes and
Aren't you running out-of-memory ? Install some CPU/MEM monitoring service and watch out for problems (AFAIK OOM doesn't really work on my machine - and often FF + Thunderbird combo brings it to the state mouse barely moves and CPU spins in kswapd...)
I've not noticed any corruption due to these freeze but often they are very long and very impacting. The only reliable workaround found was to reboot with: scsi_mod.use_blk_mq=0 dm_mod.use_blk_mq=0
I doubt this have anything in common with this. Regards Zdenek _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/