From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andre Tomt Subject: Re: 2.6.31-rc9 kernel BUG and mvsas Date: Wed, 04 Nov 2009 01:50:41 +0100 Message-ID: <4AF0CFE1.8050407@tomt.net> References: <200909090414.41274.tfjellstrom@shaw.ca> <200909091030.13147.tfjellstrom@shaw.ca> <4AA7F965.6020408@garzik.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail1.ugh.no ([80.239.42.168]:45066 "EHLO mail1.ugh.no" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751039AbZKDBXW (ORCPT ); Tue, 3 Nov 2009 20:23:22 -0500 In-Reply-To: <4AA7F965.6020408@garzik.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Jeff Garzik Cc: tfjellstrom@shaw.ca, linux-kernel@vger.kernel.org, linux-scsi , Linux IDE mailing list Jeff Garzik wrote: > On 09/09/2009 12:30 PM, Thomas Fjellstrom wrote: >> No errors on that disk. Other than the one above, and its more of a >> warning. >> However, I just rebooted to add some extra drives, thinking everything >> was >> working a little better now that I've updated to 2.6.31-rc9, I'm >> treated to >> the following two messages right after boot (and a system lockup to >> boot): Jeff & Co, Just chiming in with a "me too" comment. Identical issues with the AOC-SASLP-MV8 card with 8 Seagate Barracuda 7200.11 1.5TB drives using the mvsas driver. Creating a md raid array seems to trigger it nearly instantly, however other loads do not trigger it as fast (if at all, only tested briefly with paralell dd). Not sure if its related in any way, but I also noticed that with parallell dd read on all ports, the card/driver tops out at 600MB/s even though the card is in a northbridge connected slot running in x4 mode. Only the first 4-5 ports run at nearly full speed, while the rest barely gets to read any data at all. To illustrate, it looks sort of like this in iostat -m: sda 122 sdb 122 sbc 120 sdd 121 sde 100 sdf 10 sdg 5 sdh 5 Starting to think this driver has some issues with concurrency.. The other controllers have no issues saturating all their ports, even if they are on a south bridge connected slot. Same disks/setup works just fine on AHCI and sata_mv controllers on the same computer, easily pushes 8-900MB/s with md software raid5/6 (Yipes!)