linux-kernel - Re: 2.6.35-rc3 deadlocks on semaphore operations

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Date:	Fri, 25 Jun 2010 23:09:19 +0200
From:	Manfred Spraul <manfred@...orfullife.com>
To:	Luca Tettamanti <kronos.it@...il.com>
CC:	Christoph Lameter <cl@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Julia Lawall <julia@...u.dk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	maciej.rutecki@...il.com
Subject: Re: 2.6.35-rc3 deadlocks on semaphore operations

On 06/24/2010 09:22 PM, Luca Tettamanti wrote:
> Argh, "seems" was indeed appropriate. Manfred your patch does
> alleviate the problem but something is still wrong. I noticed (I'm
> developing an ajax heavy web app) that sometimes an apache worker
> hangs; I can reproduce the problem with ab (apache benchmark) and a
> high concurrency level (I'm testing with 100 and 10k requests, and I
> get only 2-5 dropped requests). This does not happen with 2.4.34.
> Any idea on how I can debug this further?
>
>    
Are there still hung httpd processes?

--
     Manfred
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