Message-ID: <43FF3055.914C25CA@tv-sign.ru>
Date: Fri, 24 Feb 2006 19:12:05 +0300
From: Oleg Nesterov <oleg@tv-sign.ru>
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To: Andrew Morton <akpm@osdl.org>, Bryan Fink <bfink@eventmonitor.com>,
       linux-kernel@vger.kernel.org, Ram Pai <linuxram@us.ibm.com>,
       Steven Pratt <slpratt@austin.ibm.com>,
       Trond Myklebust <trond.myklebust@fys.uio.no>
Subject: Re: NFS Still broken in 2.6.x?
References: <43FF24AF.63527544@tv-sign.ru>
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Oleg Nesterov wrote:
> 
> Afaics, this problem was resolved a long ago.
> 
> The patch below should fix this problem. Does it?

Forgot to mention, this patch was tested,

Steven Pratt wrote:
>
> This is the patch I think we should apply.  Running tiobench with 4k 
> request size, 4GB working set, 256 threads and a 2MB max_readahead (to 
> help induce thrashing) on a 1GB 8way machine, throughput of sequential 
> IO increased from 50MB/sec to 92MB/sec on a 5disk raid0 array.  Tests 
> with smaller max_readaheads and smaller thread counts were all withing 
> the noise range of the benchmark, which is to be expected.

Oleg.
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