From mboxrd@z Thu Jan 1 00:00:00 1970 From: Beth Kon Subject: Re: ata exception messages Date: Wed, 04 Jun 2008 09:57:57 -0400 Message-ID: <1212587877.6885.24.camel@beth-ubuntu> References: <1212504548.6885.13.camel@beth-ubuntu> <1212582914.6885.20.camel@beth-ubuntu> <48468CCF.8070805@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Avi Kivity Return-path: Received: from e1.ny.us.ibm.com ([32.97.182.141]:57420 "EHLO e1.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759619AbYFDN6U (ORCPT ); Wed, 4 Jun 2008 09:58:20 -0400 Received: from d01relay04.pok.ibm.com (d01relay04.pok.ibm.com [9.56.227.236]) by e1.ny.us.ibm.com (8.13.8/8.13.8) with ESMTP id m54DwJJL030671 for ; Wed, 4 Jun 2008 09:58:19 -0400 Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay04.pok.ibm.com (8.13.8/8.13.8/NCO v8.7) with ESMTP id m54DwJRb155558 for ; Wed, 4 Jun 2008 09:58:19 -0400 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m54DwIT0006947 for ; Wed, 4 Jun 2008 09:58:18 -0400 In-Reply-To: <48468CCF.8070805@qumranet.com> Sender: kvm-owner@vger.kernel.org List-ID: On Wed, 2008-06-04 at 15:38 +0300, Avi Kivity wrote: > Beth Kon wrote: > > On Tue, 2008-06-03 at 10:49 -0400, Beth Kon wrote: > > > >> I'm running an Ubuntu 7.10 guest on a kvm git build (commit > >> 3125ffd6edb9384b3e418fc08fea99e7e1548a96) and am seeing repeated > >> messages like: > >> > >> [3393.124685] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 > >> frozen > >> [3393.127599] ata1.00: cmd ca/00:30:af:c1:48/00:00:00:00:00/e0 tag 0 cdb > >> 0x0 data 4096 out > >> > >> I see that they're coming from ata_eh_link_report in > >> drivers/ata/libata-eh.c but am not familiar enough with this code to > >> understand what the problem is. > >> > >> Does anyone have any idea what might be causing this? > >> > >> > > I discovered that these messages were associated with my disk image being NFS > > mounted. Yes, the network has been misbehaving lately, so could be causing timeouts. > > Interesting. Is it an exceptionally slow server (or perhaps, on a lossy > network)? > > I can see how timeouts can annoy the ide driver, but I've never seen > this myself. > -- Elizabeth Kon (Beth) IBM Linux Technology Center Open Hypervisor Team email: eak@us.ibm.com