Re: rcu stalls during fstests runs for xfs

[Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com>]

On Jan 29, 2026 / 15:19, Paul E. McKenney wrote:
[...]
> > > > I have seen the static-key pattern called out by Dave Chinner when running
> > > > KASAN on large systems.  We worked around this by disabling KASAN's use
> > > > of static keys.  In case you were running KASAN in these tests.
> > > 
> > > As to KASAN, yes, I enable it in my test runs. I find three static-keys under
> > > mm/kasan/*. I will think if they can be disabled in my test runs. Thanks.
> > 
> > There is a set of Kconfig options that disables static branches.  If you
> > cannot find them quickly, please let me know and I can look them up.

Thank you. But now I know the fix series by Thomas is available. I prioritize
the evaluation of the fix series. Later on, I will try disabling the static-keys
if it is required.

> 
> And Thomas Gleixner posted an alleged fix to the CID issue here:
> 
> https://lore.kernel.org/lkml/20260129210219.452851594@kernel.org/
> 
> Please let him know whether or not it helps.

Good to see this fix candidate series, thanks :) I have set up the patches and
started my regular test runs. So far, the hangs have been observed once or twice
a week. To confirm the effect of the fix series, I think two weeks runs will be
required. Once I get the result, will share it on this thread and with Thomas.