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Date:   Mon, 7 Dec 2020 10:09:53 +0100
From:   Peter Zijlstra <peterz@infradead.org>
To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Bernd Edlinger <bernd.edlinger@hotmail.de>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>,
        Jann Horn <jannh@google.com>,
        Vasiliy Kulikov <segoon@openwall.com>,
        Al Viro <viro@zeniv.linux.org.uk>,
        Oleg Nesterov <oleg@redhat.com>,
        Cyrill Gorcunov <gorcunov@gmail.com>,
        Sargun Dhillon <sargun@sargun.me>,
        Christian Brauner <christian.brauner@ubuntu.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Waiman Long <longman@redhat.com>,
        Davidlohr Bueso <dave@stgolabs.net>
Subject: Re: [PATCH 3/3] exec: Transform exec_update_mutex into a rw_semaphore
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On Fri, Dec 04, 2020 at 12:48:18PM -0800, Linus Torvalds wrote:
> On Fri, Dec 4, 2020 at 12:30 PM Bernd Edlinger
> <bernd.edlinger@hotmail.de> wrote:
> >>
> > >    perf_event_open  (exec_update_mutex -> ovl_i_mutex)
> 
> Side note: this one looks like it should be easy to fix.

> PeterZ, is there something I'm missing?

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  https://lkml.kernel.org/r/20200828123720.GZ1362448@hirez.programming.kicks-ass.net