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Date: Sat, 25 Jan 2003 03:55:58 +1100
From: Nick Piggin <piggin@cyberone.com.au>
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To: David Mansfield <lkml@dm.cobite.com>
CC: Andrew Morton <akpm@digeo.com>, linux-kernel@vger.kernel.org
Subject: Re: 2.5.59mm5, raid1 resync speed regression.
References: <Pine.LNX.4.44.0301241141540.32240-100000@admin>
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David Mansfield wrote:

>Hi Andrew, list,
>
>I'm booting 2.5.59mm5 to run a database workload benchmark that I've been
>running against various kernels.  I'll post those results if they are
>interesting later, but I did notice that the raid1 resync is proceeding at
>half the speed (at best) that it usually does (vs. 2.5.59 that is).
>
>It currently at about 4-8 mb/sec (and falling as resync progresses),
>usually at 12-15 mb/sec.
>
>System is SMP 2xPIII 866mhz, 2GB ram, raid1 is two 15k U160 (running only
>an Ultra speed :-( because the onboard controller sucks) SCSI disks, same
>channel on aic7xxx.
>
>Kernel is 2.5.59-mm5 compiled with gcc version 2.96 20000731 (Red Hat 
>Linux 7.3 2.96-112)
>
>David
>
Thanks for the report. Please do post any results you get.

What disk workload exactly does a RAID1 resync consist of?

Nick

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