From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Herrenschmidt Subject: Occasional IDE lost interrupts Date: Thu, 11 Aug 2005 13:49:30 +0200 Message-ID: <1123760971.6802.2.camel@gaston> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from gate.crashing.org ([63.228.1.57]:49038 "EHLO gate.crashing.org") by vger.kernel.org with ESMTP id S932324AbVHKLuD (ORCPT ); Thu, 11 Aug 2005 07:50:03 -0400 Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Linux Kernel list , list linux-ide , Bartlomiej Zolnierkiewicz Hi Bart ! That seem to be a new problem though I can't tell for sure when it started. I've had reports from users for some time now of "occasional" (once in a while, maybe once a day) lost interrupts on the mac hard disk. I have about 30 days uptime and just saw a similar one in my log. It happen during a disk access storm (apt-get upgrade :). The problem when this happen is that I just lost DMA which is fairly annoying. Users are not supposed to understand the magic of hdparm -d1 /dev/hda and that shouldn't happen anyways... Do you have any clue of what can be going on ? The IDE pmac driver has not changed for a long time and I think that problem is fairly new (maybe 2.6.12 ? not sure, first time I actually see it unless it's unrelated and my disk is actually dying). Shouldn't we have some more retry before giving up on DMA ? Regards, Ben. [432796.162593] ide-pmac lost interrupt, dma status: 8480 [432796.162606] hda: lost interrupt [432796.162613] hda: dma_intr: status=0xd0 { Busy } [432796.162619] [432796.162622] ide: failed opcode was: unknown [432796.162632] hda: DMA disabled [432796.262581] ide0: reset: success