linux-kernel - Re: [GIT PULL] printk for 4.13

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Message-ID: <CA+55aFxXPnNo_tkKb-3iyeRb1Vugfcg=1z9vc7ZmYzxZb5237w@mail.gmail.com>
Date:   Wed, 5 Jul 2017 18:15:05 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Cc:     Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [GIT PULL] printk for 4.13

On Wed, Jul 5, 2017 at 5:44 PM, Sergey Senozhatsky
<sergey.senozhatsky.work@...il.com> wrote:
>
> PRINTK_NMI_DEFERRED_CONTEXT_MASK calls into vprintk_deferred(), which
> does vprintk_emit(0, LOGLEVEL_SCHED, NULL, 0, fmt, args). and
> vprintk_emit() LOGLEVEL_SCHED is nothing, but printk_deferred(), which
> never calls into the scheduler and does not even try to lock console_sem.

Hmm. Ok. I think I see what you're saying. We're just adding it to the
log buffer, but not actually going through the whole "lets see if we
can push it further".

So I will take another look tomorrow, right now I'm feeling a bit
merged out for the day,

               Linus