From: Petr Mladek <pmladek@suse.com>
To: Rik van Riel <riel@surriel.com>
Cc: John Ogness <john.ogness@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
Omar Sandoval <osandov@meta.com>,
linux-kernel@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>,
Sergey Senozhatsky <senozhatsky@chromium.org>,
kernel-team <kernel-team@meta.com>
Subject: Re: [RFC PATCH] nmi,printk: fix ABBA deadlock between nmi_backtrace and dump_stack_lvl
Date: Mon, 16 Sep 2024 16:33:46 +0200 [thread overview]
Message-ID: <ZuhBymvNiB_8sWMu@pathway.suse.cz> (raw)
In-Reply-To: <dbed42dc3bc05fa772e11b54e93526a66698401f.camel@surriel.com>
On Fri 2024-09-13 13:25:33, Rik van Riel wrote:
> On Wed, 2024-07-24 at 17:08 +0200, Petr Mladek wrote:
> > On Wed 2024-07-24 16:51:46, John Ogness wrote:
> >
> >
> > I see. I agree that deferring printk on that CPU [0] is the right
> > solution.
> >
> > > [0]
> > > https://lore.kernel.org/lkml/87plrcqyii.fsf@jogness.linutronix.de
> >
> Hi Petr,
>
> we have been running with John Ogness's fix (from the mail linked
> above) for about a month now, and it has reduced the number of
> deadlocks in the Linux kernel in our fleet by maybe 90%, comparing
> a kernel with the fix, to a kernel without the fix.
>
> Would it be possible to get John Ogness's fix queued up for merging
> in the printk tree, and then later to Linus?
Sure. Thanks for reminder.
John, could you please send the fix as a proper patch with some
reasonable commit message?
Best Regards,
Petr
next prev parent reply other threads:[~2024-09-16 14:33 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-16 3:20 [RFC PATCH] nmi,printk: fix ABBA deadlock between nmi_backtrace and dump_stack_lvl Rik van Riel
2024-07-17 7:16 ` John Ogness
2024-07-17 13:47 ` Rik van Riel
2024-07-18 7:25 ` John Ogness
2024-07-18 13:38 ` Rik van Riel
2024-07-18 14:09 ` John Ogness
2024-07-18 15:23 ` Rik van Riel
2024-07-24 12:56 ` Petr Mladek
2024-07-24 14:45 ` John Ogness
2024-07-24 15:08 ` Petr Mladek
2024-09-13 17:25 ` Rik van Riel
2024-09-16 14:33 ` Petr Mladek [this message]
2024-07-24 16:55 ` Rik van Riel
2024-07-24 12:45 ` Petr Mladek
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