From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sergei Shtylyov Subject: Re: [BUG] ide dma_timer_expiry, then hard lockup Date: Fri, 22 Jun 2007 19:39:32 +0400 Message-ID: <467BED34.4080004@ru.mvista.com> References: <20070618175713.GD5836@austin.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from homer.mvista.com ([63.81.120.155]:9141 "EHLO imap.sh.mvista.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1756726AbXFVPhu (ORCPT ); Fri, 22 Jun 2007 11:37:50 -0400 In-Reply-To: <20070618175713.GD5836@austin.ibm.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Linas Vepstas Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org Linas Vepstas wrote: > I've got a hard lockup in the ide subsystem, probably > due to some irq spew or something like that. > I've just bought a brand new Maxtor 320GB disk driver > for the insane price of $70 US to replace another > failing drive. It works well under light load; > I was able to copy about 60GB to it. However, > under heavy load, such as reconstruction of an MD > RAID-1 array, it'll lock up the kernel. Which means > that my system won't boot :-( > I'm running 2.6.21.1, although the problem seems to occur > in 2.6.19 and 2.6.18 too; its been there a while; I vageuly > remember similar problems in 2.6.5 or 2.6.10. Ah... so you're saying that the old disk works OK, yet you've already observed alike behavior on other disks... That speaks against blacklisting the drive. > I can get the system to boot by sneaking in an > "hdparm -d0 /dev/hdc" early in the boot process, to turn off Could probably do the same trick and specify the lower DMA speed by using -X n option (where n ranges from 64 to 70 for UltraDMA modes 0 to 6) and see if it changes anything... > the use of DMA, but it seems that PIO is so slow, that it takes > forever to get NFS started. You can use 'ide=nodma' kernel option for this. MBR, Sergei