From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Schumacher Subject: Re: new kernel = megaraid performance cut in half Date: Thu, 16 May 2002 08:39:15 -0800 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <3CE3E0B3.4000108@aptalaska.net> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org Mikael Abrahamsson wrote: > On Tue, 14 May 2002, Matthew Schumacher wrote: > > >>Is there anything I can do to resolve the speed issue so that I can >>continue using the 2.4.18 kernel? This box is serving mail so 21MB sec >>on 3x10000rpm scsi3 disks in a raid 5 array is not acceptable. > > > I am running 7.3 (upgraded from 7.2) and I feel that the 2.4.18 kernel > with the new VM code is actually inferior to that of 2.4.9-31. I have lots > of memory (1.2 gig) and lots of disk access, and I see more swap and worse > interactive performance on 2.4.18 (redhat supplied kernel) as compared to > the redhat supplied 2.4.9-31 for 7.2. > Hmm, the reason why I upgraded to 2.4.18 in the first place was to fix a bunch of problems with quota. I wonder if 2.4.9-31 will work with the quotas correctly, I was on 2.4.7. schu