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. However with 4.12.9 with CONFIG_HZ=250, CONFIG_PREEMPT_VOLUNTARY=y + no CPU optimizations: No hang after resume, no matter whether I use CFQ or scsi-mq + BFQ. Both configs attached. Also 4.13.2 with CFQ is stable so far. I am looking forward for fixes to appear in 4.13.x with x>2 and retest with BFQ then, unless you have a different advice. I am running Debian Sid/Experimental from BTRFS RAID 1 with two SSDs merkaba:~> lsscsi | grep ATA [0:0:0:0] disk ATA INTEL SSDSA2CW30 0362 /dev/sda [2:0:0:0] disk ATA Crucial_CT480M50 MU03 /dev/sdb on ThinkPad T520 (Sandybridge). Thanks, -- Martin
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config-4.12.10-tp520-btrfstrim.xz
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config-4.12.9-tp520-btrfstrim+.xz
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