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Date: Sun, 21 Jan 2024 14:32:18 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Dylan Hatch <dylanbhatch@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>, Kees Cook <keescook@chromium.org>,
 Frederic Weisbecker <frederic@kernel.org>, "Joel Fernandes (Google)"
 <joel@joelfernandes.org>, Ard Biesheuvel <ardb@kernel.org>,
 "Matthew Wilcox (Oracle)" <willy@infradead.org>, Thomas Gleixner
 <tglx@linutronix.de>, Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
 "Eric W. Biederman" <ebiederm@xmission.com>, Vincent Whitchurch
 <vincent.whitchurch@axis.com>, Dmitry Vyukov <dvyukov@google.com>, Luis
 Chamberlain <mcgrof@kernel.org>, Mike Christie
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 Catalin Marinas <catalin.marinas@arm.com>, Stefan Roesch
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 <josh@joshtriplett.org>, Helge Deller <deller@gmx.de>, Ondrej Mosnacek
 <omosnace@redhat.com>, Florent Revest <revest@chromium.org>, Miguel Ojeda
 <ojeda@kernel.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] getrusage: use sig->stats_lock
Message-Id: <20240121143218.35d3171018771e5c2b5820e3@linux-foundation.org>
In-Reply-To: <CADBMgpxC+BP-wfrM-wP1nbZOcRb0LbsmMDQ3LQ8hUKYsF3QECw@mail.gmail.com>
References: <20240117192534.1327608-1-dylanbhatch@google.com>
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On Fri, 19 Jan 2024 19:27:49 -0800 Dylan Hatch <dylanbhatch@google.com> wrote:

> 
> I applied these to a 5.10 kernel, and my repro (calling getrusage(RUSAGE_SELF)
> from 200K threads) is no longer triggering a hard lockup.

Thanks, but...

The changelogs don't actually describe any hard lockup.  [1/2] does
mention "the deadlock" but that's all the info we have.

So could we please have a suitable description of the bug which these are
addressing?  And a Reported-by:, a Closes: and a Fixes would be great too.