From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Lee Revell <rlrevell@joe-job.com>
Cc: root@chaos.analogic.com, Linux kernel <linux-kernel@vger.kernel.org>
Subject: Re: printk() with a spin-lock held.
Date: Sat, 23 Oct 2004 15:48:41 +1000 [thread overview]
Message-ID: <4179F0B9.20908@yahoo.com.au> (raw)
In-Reply-To: <1098503815.13176.2.camel@krustophenia.net>
Lee Revell 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.
>
You can call printk anywhere (except from the scheduler).
Or if you're doing tricky things with preempt.
>
>>If so, NotGood(tm).
>
>
> See above. If you think you can improve the situation, patches are
> welcome, as always.
>
In this case, the patch would be to himself though.
next prev parent reply other threads:[~2004-10-23 5:49 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
2004-10-23 7:04 ` Lee Revell
2004-10-23 5:48 ` Nick Piggin [this message]
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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