On Wed, Sep 20, 2017 at 07:25:02PM +0200, Martin Steigerwald wrote: > Ming Lei - 28.08.17, 21:32: > > On Mon, Aug 28, 2017 at 03:10:35PM +0200, Martin Steigerwald wrote: > > > Ming Lei - 28.08.17, 20:58: > > > > On Sun, Aug 27, 2017 at 09:43:52AM +0200, Oleksandr Natalenko wrote: > > > > > Hi. > > > > > > > > > > Here is disk setup for QEMU VM: > […] > > > > > In words: 2 virtual disks, RAID10 setup with far-2 layout, LUKS on it, > > > > > then > > > > > LVM, then ext4 for boot, swap and btrfs for /. > > > > > > > > > > I couldn't reproduce the issue with single disk without RAID. > > > > > > > > Could you verify if the following patch fixes your issue? > > > > > > Could this also apply to non MD RAID systems? I am using BTRFS RAID > > > 1 with two SSDs. So far with CFQ it runs stable. > > > > It is for fixing Oleksandr's issue wrt. blk-mq, and looks not for you. > > My findings are different: > > On 4.12.10 with CONFIG_HZ=1000, CONFIG_PREEMPT=y and optimizations for Intel > Core/newer Xeon I see this: > > 1) Running with CFQ: No hang after resume > > 2) Running with scsi_mod.use_blk_mq=1 + BFQ: Hang after resume within first 1-2 > days. Hi Martin, Thanks for your report! Could you test the following patchset to see if it fixes your issue? https://marc.info/?l=linux-block&m=150579298505484&w=2 -- Ming
