Re: stalling IO regression since linux 5.12, through 5.18
From: Chris Murphy <hidden>
Date: 2022-08-18 04:21:27
Also in:
linux-block, linux-btrfs, lkml
On Thu, Aug 18, 2022, at 12:12 AM, Chris Murphy wrote:
On Wed, Aug 17, 2022, at 11:41 PM, Ming Lei wrote:quoted
OK, can you post the blk-mq debugfs log after you trigger it on v5.17?https://drive.google.com/file/d/1n8f66pVLCwQTJ0PMd71EiUZoeTWQk3dB/view?usp=sharing This time it happened pretty quickly. This log is soon after triple digit load and no IO, but not as fully developed as before. The system has become entirely unresponsive to new commands, so I have to issue sysrq+b - if I let it go too long even that won't work.
OK by the time I clicked send, the system had recovered. That also sometimes happens but then later IO stalls again and won't recover. So I haven't issued sysrq+b on this run yet. Here is a second blk-mq debugfs log... https://drive.google.com/file/d/1irHcns0qe7e7DJaDfanX8vSiqE1Nj5xl/view?usp=sharing -- Chris Murphy