Re: [Bug report] fstests generic/051 (on xfs) hang on latest linux v6.5-rc5+

[Dave Chinner <david@fromorbit.com>]

On Sun, Jun 11, 2023 at 08:48:36PM +0800, Zorro Lang wrote:
> Hi,
> 
> When I tried to do fstests regression test this weekend on latest linux
> v6.5-rc5+ (HEAD=64569520920a3ca5d456ddd9f4f95fc6ea9b8b45), nearly all
> testing jobs on xfs hang on generic/051 (more than 24 hours, still blocked).
> No matter 1k or 4k blocksize, general disk or pmem dev, or any architectures,
> or any mkfs/mount options testing, all hang there.

Yup, I started seeing this on upgrade to 6.5-rc5, too. xfs/079
generates it, because the fsstress process is crashing when the
XFS filesystems shuts down (maybe a SIGBUS from a mmap page fault?)
I don't know how reproducable it is yet; these only showed up in my
thrusday night testing so I haven't had a chance to triage it yet.

> Someone console log as below (a bit long), the call trace doesn't contains any
> xfs functions, it might be not a xfs bug, but it can't be reproduced on ext4.

AFAICT, the coredump is being done on the root drive (where fsstress
is being executed from), not the XFS test/scratch devices that
fsstress processes are exercising. I have ext3 root drives for my
test machines, so at this point I'm not sure that this is even a
filesystem related regression. i.e. it may be a recent regression in
the coredump or signal handling code....

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com