From: Andrew Morton <akpm@osdl.org>
To: Lee Revell <rlrevell@joe-job.com>
Cc: root@chaos.analogic.com, linux-kernel@vger.kernel.org
Subject: Re: printk() with a spin-lock held.
Date: Fri, 22 Oct 2004 22:27:46 -0700 [thread overview]
Message-ID: <20041022222746.0313ed9f.akpm@osdl.org> (raw)
In-Reply-To: <1098503815.13176.2.camel@krustophenia.net>
Lee Revell <rlrevell@joe-job.com> wrote:
>
> On Fri, 2004-10-22 at 15:07 -0400, Richard B. Johnson wrote:
> > Linux-2.6.9 will bug-check and halt if my code executes
> > a printk() with a spin-lock held.
> >
> > Is this the intended behavior?
>
> Yes. printk() can sleep. No sleeping with a spinlock held.
>
printk() does not sleep and may be called from any context except
a) NMI handlers and
b) when holding a scheduler runqueue->lock while klogd is running.
next prev parent reply other threads:[~2004-10-23 5:32 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-22 19:07 printk() with a spin-lock held Richard B. Johnson
2004-10-23 3:56 ` Lee Revell
2004-10-23 5:27 ` Andrew Morton [this message]
2004-10-23 7:04 ` Lee Revell
2004-10-23 5:48 ` Nick Piggin
2004-10-25 12:32 ` Richard B. Johnson
2004-10-25 18:41 ` Lee Revell
2004-10-25 19:07 ` linux-os
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