Re: stalling IO regression since linux 5.12, through 5.18
From: Chris Murphy <hidden>
Date: 2022-08-17 16:35:16
Also in:
linux-block, linux-btrfs, lkml
On Wed, Aug 17, 2022, at 11:34 AM, Ming Lei wrote:
From the 2nd log of blockdebugfs-all.txt, still not see any in-flight IO on request based block devices, but sda is _not_ included in this log, and only sdi, sdg and sdf are collected, is that expected?
While the problem was happening I did
cd /sys/kernel/debug/block
find . -type f -exec grep -aH . {} \;
The file has the nodes out of order, but I don't know enough about the interface to see if there are things that are missing, or what it means.
BTW, all request based block devices should be observed in blk-mq debugfs.
/sys/kernel/debug/block contains drwxr-xr-x. 2 root root 0 Aug 17 15:20 md0 drwxr-xr-x. 51 root root 0 Aug 17 15:20 sda drwxr-xr-x. 51 root root 0 Aug 17 15:20 sdb drwxr-xr-x. 51 root root 0 Aug 17 15:20 sdc drwxr-xr-x. 51 root root 0 Aug 17 15:20 sdd drwxr-xr-x. 51 root root 0 Aug 17 15:20 sde drwxr-xr-x. 51 root root 0 Aug 17 15:20 sdf drwxr-xr-x. 51 root root 0 Aug 17 15:20 sdg drwxr-xr-x. 51 root root 0 Aug 17 15:20 sdh drwxr-xr-x. 4 root root 0 Aug 17 15:20 sdi drwxr-xr-x. 2 root root 0 Aug 17 15:20 zram0 -- Chris Murphy