From: Andrew Morton <akpm@zip.com.au>
To: Badari Pulavarty <pbadari@us.ibm.com>
Cc: linux-kernel@vger.kernel.org, Gerrit Huizenga <gerrit@us.ibm.com>,
Hans-J Tannenberger <hjt@us.ibm.com>,
Janet Morgan <janetmor@us.ibm.com>,
Mike Anderson <andmike@us.ibm.com>,
Martin Bligh <mjbligh@us.ibm.com>
Subject: Re: 2.5.32 IO performance issues
Date: Thu, 29 Aug 2002 11:43:48 -0700 [thread overview]
Message-ID: <3D6E6B64.66203783@zip.com.au> (raw)
In-Reply-To: 200208291820.g7TIKHA19433@eng2.beaverton.ibm.com
Badari Pulavarty wrote:
>
> Hi,
>
> I am having severe IO performance problems with 2.5.32 (2.5.31 works fine).
> I was wondering what caused this.
>
> As you can see, IO rate went from
>
> 384MB/sec with 6% CPU utilization on 2.5.31
> to
> 120MB/sec with 19% CPU utilization on 2.5.32
>
> ...
> 151712 default_idle 2370.5000
> 21622 __scsi_end_request 122.8523
block-highmem is bust for scsi. (aic7xxx at least). Does
http://www.zip.com.au/~akpm/linux/patches/2.5/2.5.32/2.5.32-mm2/broken-out/scsi_hack.patch
fix it?
next prev parent reply other threads:[~2002-08-29 18:41 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-29 18:20 2.5.32 IO performance issues Badari Pulavarty
2002-08-29 18:39 ` Rik van Riel
2002-08-29 19:02 ` Dave Hansen
2002-08-29 18:43 ` Andrew Morton [this message]
2002-08-29 20:55 ` Badari Pulavarty
2002-08-29 21:53 ` Patrick Mansfield
2002-08-29 22:23 ` Andrew Morton
2002-08-31 9:14 ` Jens Axboe
2002-08-31 9:14 ` Jens Axboe
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