linux-kernel - Re: Too many printks leads to hang?

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Message-ID: <AANLkTim7LkP1MUYzzE8BvfCHIKmDkndh-fmODC5y3h4O@mail.gmail.com>
Date:	Sat, 15 May 2010 16:19:25 +0200
From:	Leon Woestenberg <leon.woestenberg@...il.com>
To:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>
Cc:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Andiry Xu <andiry.xu@....com>
Subject: Re: Too many printks leads to hang?

Hello all,

On Sat, May 15, 2010 at 1:03 AM, Sarah Sharp
<sarah.a.sharp@...ux.intel.com> wrote:
> Is it expected that excessive printks from interrupt context could lead
> to a system hang?  One of the stack traces I could grab looks like this:
>

I have seen spurious hangs while debugging a device driver, which
printk()d hundreds of messages per second.
Disabling netconsole solved all issues for me.

This was with Ubuntu 9.04 on x86 and I didn't update the kernel on
that machine yet, but I really should try against upstream kernel /
netconsole.

Regards,
-- 
Leon
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