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Date: Fri, 05 Mar 2010 11:44:01 +0100
From: John Hughes <john@Calva.COM>
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To: Andre Noll <maan@systemlinux.org>
CC: Jens Axboe <jens.axboe@oracle.com>,
       Andrew Morton <akpm@linux-foundation.org>,
       bugzilla-daemon@bugzilla.kernel.org, bugme-daemon@bugzilla.kernel.org,
       linux-kernel@vger.kernel.org
Subject: Re: [Bugme-new] [Bug 15426] New: Running many copies of bonnie++
 on different filesystems seems to deadlock in sync
References: <bug-15426-10286@http.bugzilla.kernel.org/> <20100302161627.bf02d0a2.akpm@linux-foundation.org> <4B8E517E.3010702@Calva.COM> <20100303115015.GN5768@kernel.dk> <4B8E5805.30505@Calva.COM> <20100303120317.GP5768@kernel.dk> <20100303144241.GF21495@skl-net.de> <4B8FC9F8.1050700@Calva.COM> <20100304174239.GO7517@skl-net.de>
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Andre Noll wrote:
> On 15:55, John Hughes wrote:
>   
>>> That's the same patch you posted two weeks ago and on which Linus
>>> commented he thinks it is broken. He also proposed another, simpler
>>> patch (included below) which I'm running for a few days and which
>>> fixes the sync problem for me.
>>>  
>>>       
>> I've tried the "simpler patch" on my system and it makes no difference 
>> for me.
>>     
>
> Does it make no difference to Jens' patch, or no difference to an
> unpatched kernel?
>   
No difference to an unpatched kernel.  I didn't think of stacking the 
patches.
> BTW, switching from cfq to noop or deadline also improved things a
> bit for me.
>   
Will try that.