From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Battersby Subject: Re: Performance problems with 3ware 9500S-4LP and 2.6.25-rc3 Date: Wed, 27 Feb 2008 09:26:47 -0500 Message-ID: <47C57327.6070901@cybernetics.com> References: <20080226174314.GA30767@skl-net.de> <47C49B99.1060707@nets.rwth-aachen.de> <20080227101154.GD30767@skl-net.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from host64.cybernetics.com ([70.169.137.4]:2645 "EHLO mail.cybernetics.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753985AbYB0O0w (ORCPT ); Wed, 27 Feb 2008 09:26:52 -0500 In-Reply-To: <20080227101154.GD30767@skl-net.de> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Andre Noll Cc: Arnd Hannemann , adam radford , =?ISO-8859-1?Q?Johannes_W=F6rner?= , James Bottomley , linux-scsi , linux-kernel Andre Noll wrote: > Thanks, this helped a lot. However, there does not seem to be a way > to make the system more responsive, which is really the problem we > are experiencing. > > Andre > This is not 3ware-specific, but kernel 2.6.24 has new per-device write throttling that might help with the responsiveness issue: http://kernelnewbies.org/LinuxChanges#head-92340ffcec39e7c2a09fd933243fb18eda57f1b4 http://lwn.net/Articles/245600/ Also, check to see if the 3ware controller has a background initialize or verify in progress, since that will obviously slow things down until it is complete. Tony