linux-kernel - Re: next: rcu_preempt self-detected stall on CPU

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Message-ID: <CAOssrKdc4rcjJOqBnhbRa=R5yQY1erh+KuXr_2-nGTQ-qk3vOg@mail.gmail.com>
Date: Wed, 4 Sep 2024 16:19:39 +0200
From: Miklos Szeredi <mszeredi@...hat.com>
To: Naresh Kamboju <naresh.kamboju@...aro.org>
Cc: open list <linux-kernel@...r.kernel.org>, rcu <rcu@...r.kernel.org>, 
	"open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest@...r.kernel.org>, lkft-triage@...ts.linaro.org, 
	Linux Regressions <regressions@...ts.linux.dev>, yangyun50@...wei.com, 
	"Paul E. McKenney" <paulmck@...nel.org>, Zhen Lei <thunder.leizhen@...wei.com>, 
	Anders Roxell <anders.roxell@...aro.org>
Subject: Re: next: rcu_preempt self-detected stall on CPU - queued_spin_lock_slowpath

On Wed, Sep 4, 2024 at 2:06 PM Naresh Kamboju <naresh.kamboju@...aro.org> wrote:
>
> The following kernel rcu info generated while running the test case
> selftests: memfd: run_fuse_test.sh on qemu-arm64 running Linux
> next-20240902. The qemu-arm64 did not recover.
>
> This build was created with kselftest merge configs.
>
> Anders bisected this to,
>   # first bad commit:
>     [5fb9c98e9d8ddf2abc645e2dcd9eb6703f77fdab]
>     fuse: add support for no forget requests

The bad commit was reverted from -next.

Thanks,
Miklos