linux-kernel - Re: Fwd: Possible race in rt_mutex_adjust_prio

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Date:   Sat, 8 Jul 2023 01:28:25 +0800
From:   Henry Wu <triangletrap12@...il.com>
To:     Mike Galbraith <efault@....de>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: Fwd: Possible race in rt_mutex_adjust_prio_chain

Hi, Peter and Mike.

Mike Galbraith <efault@....de> 于2023年7月7日周五 23:39写道：
>
> On Fri, 2023-07-07 at 14:59 +0200, Peter Zijlstra wrote:
> >
> > The below implements this duplication and seems to not insta-crash.
>
> RT bits of ww_mutex.h needed tree_entry -> tree.entry.  Modulo that, RT
> seems content.
>
>         -Mike

I patched my kernel with Peter's patch and tested it with my test
program. I haven't seen any race so far and I will test more tomorrow.
Fedora's default kernel config doesn't enable CONFIG_PREEMPT_RT so I
didn't come across with compile error. I will test final patch if
available.