My last email on this thread: I swear. I don't want to bother the mailing list about this more. On Thu, Jan 03, 2019 at 05:29:51PM +0900, Tomasz Chmielewski wrote: > I could see filesystem corruption on every system using with PPA 4.19 lower > than .8. Didn't do any kernel boot parameter changes when upgrading from > 4.18. gelma@check:~$ uname -a # to use a broken kernel Linux check 4.19.6-041906-generic #201812030857 SMP Mon Dec 3 13:59:30 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux gelma@check:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04 LTS Release: 18.04 Codename: bionic gelma@check:~$ dmesg|grep -i scheduler [ 1.062769] io scheduler noop registered [ 1.062993] io scheduler deadline registered [ 1.063257] io scheduler cfq registered (default) But also just having set "none" is not enough. To trigger it you must force multiqueue. I usually compile the git kernel, but I destroyed the fs only when I added: scsi_mod.use_blk_mq=1 on boot kernel. Details here: https://bugzilla.kernel.org/show_bug.cgi?id=201685 Ciao, Gelma
