linux-kernel - Re: [REGRESSION] 2.6.39-rc1: f23eb2b breaks console output

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Date:	Mon, 4 Apr 2011 20:42:30 +0100
From:	Sitsofe Wheeler <sitsofe@...oo.com>
To:	Alexander Beregalov <a.beregalov@...il.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Greg KH <gregkh@...e.de>, Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [REGRESSION] 2.6.39-rc1: f23eb2b breaks console output

On Mon, Apr 04, 2011 at 11:15:10PM +0400, Alexander Beregalov wrote:
> 
> commit f23eb2b2b28547fc70df82dd5049eb39bec5ba12 tty: stop using
> "delayed_work" in the tty layer
> breaks console output for me.

Same here - doing a dmesg in an xterm makes the machine hang for about
10 seconds and latencytop whinges that a raw SCSI command took 4000ms to
complete (uniprocessor x86 EeePC 900).

Additionally, you won't see this problem if you have CONFIG_PREEMPT set
but as my config has CONFIG_PREEMPT_VOLUNTARY=y I do see this problem.
Reverting f23eb2b2b28547fc70df82dd5049eb39bec5ba12 fixed the problem for
me too.

-- 
Sitsofe | http://sucs.org/~sits/
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