From: Peter Zijlstra <peterz@infradead.org>
To: John Stultz <jstultz@google.com>
Cc: "Borah, Chaitanya Kumar" <chaitanya.kumar.borah@intel.com>,
willy@infradead.org, linux-kernel@vger.kernel.org,
"intel-gfx@lists.freedesktop.org"
<intel-gfx@lists.freedesktop.org>,
"intel-xe@lists.freedesktop.org" <intel-xe@lists.freedesktop.org>,
"Kurmi, Suresh Kumar" <suresh.kumar.kurmi@intel.com>,
"Saarinen, Jani" <jani.saarinen@intel.com>,
ravitejax.veesam@intel.com,
K Prateek Nayak <kprateek.nayak@amd.com>
Subject: Re: Regression on linux-next (next-20260324 )
Date: Tue, 21 Apr 2026 12:15:21 +0200 [thread overview]
Message-ID: <20260421101521.GO3102624@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <CANDhNCq=oizzud3hH3oqGzTrcjB8OwGeineJ3mwZuGdDWG8fRQ@mail.gmail.com>
On Mon, Apr 20, 2026 at 11:45:12PM -0700, John Stultz wrote:
> So I tripped over this in my own testing today preping proxy patches,
> bisecting it down to the same problematic commit 25500ba7e77c
> ("locking/mutex: Remove the list_head from struct mutex").
>
> Inteed it does seem related to ww_mutexes, as I can pretty easily
> reproduce it with defconfig + CONFIG_WW_MUTEX_SELFTEST=y using
> qemu-system-x86
>
> Where the test will basically hang on bootup.
*groan* indeed. This of course means no CI is running this thing :-(
Anyway, yay for deterministic reproducer. Let me go prod at this.
next prev parent reply other threads:[~2026-04-21 10:15 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-27 13:39 Regression on linux-next (next-20260324 ) Borah, Chaitanya Kumar
2026-03-27 16:31 ` Peter Zijlstra
2026-03-27 16:43 ` Peter Zijlstra
2026-03-30 8:26 ` Borah, Chaitanya Kumar
2026-03-30 19:50 ` Peter Zijlstra
2026-04-20 13:03 ` Peter Zijlstra
2026-04-21 6:45 ` John Stultz
2026-04-21 10:15 ` Peter Zijlstra [this message]
2026-04-21 12:54 ` K Prateek Nayak
2026-04-21 14:37 ` Peter Zijlstra
2026-04-21 14:45 ` Matthew Wilcox
2026-04-21 15:03 ` Peter Zijlstra
2026-04-21 15:48 ` K Prateek Nayak
2026-04-21 17:29 ` John Stultz
2026-04-21 20:56 ` Peter Zijlstra
2026-04-21 14:31 ` Borah, Chaitanya Kumar
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