From: Sergey Senozhatsky <senozhatsky@chromium.org>
To: John Ogness <john.ogness@linutronix.de>
Cc: Petr Mladek <pmladek@suse.com>,
Sergey Senozhatsky <senozhatsky@chromium.org>,
Steven Rostedt <rostedt@goodmis.org>,
linux-kernel@vger.kernel.org,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: Re: [PATCH v2] printk: defer_console_output: use atomic update
Date: Mon, 14 Feb 2022 14:32:54 +0900 [thread overview]
Message-ID: <YgnphtfTRBenHgfp@google.com> (raw)
In-Reply-To: <87leyhd4wc.fsf@jogness.linutronix.de>
On (22/02/11 12:28), John Ogness wrote:
> Hi Petr,
>
> On 2022-02-10, Petr Mladek <pmladek@suse.com> wrote:
> > The patch has been committed into printk/linux.git, branch for-5.18.
>
> Sebastian also pointed out that the use of __this_cpu_xchg() is the same
> problem with the same variable for the same reason. We should fold that
> change into the patch as well. The patch will followup this message.
But that __this_cpu_xchg() (that this lol) can only be performed form the
IRQ context. Can you please elaborate what is the problem with it?
next prev parent reply other threads:[~2022-02-14 5:33 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-03 11:29 [PATCH] printk: defer_console_output: do not assume interrupts disabled John Ogness
2022-02-03 11:33 ` Sebastian Andrzej Siewior
2022-02-04 7:04 ` Sergey Senozhatsky
2022-02-07 9:46 ` [PATCH v2] printk: defer_console_output: use atomic update John Ogness
2022-02-10 15:47 ` Petr Mladek
2022-02-11 11:22 ` John Ogness
2022-02-11 11:23 ` [PATCH v3] printk: use atomic updates for klogd work John Ogness
2022-02-14 5:35 ` Sergey Senozhatsky
2022-02-15 15:26 ` Petr Mladek
2022-02-14 5:32 ` Sergey Senozhatsky [this message]
2022-02-14 5:35 ` [PATCH v2] printk: defer_console_output: use atomic update Sergey Senozhatsky
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