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

From: Sitsofe Wheeler
Date: Mon Apr 04 2011 - 16:18:28 EST


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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