Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755655AbXFXTmS (ORCPT ); Sun, 24 Jun 2007 15:42:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751433AbXFXTmK (ORCPT ); Sun, 24 Jun 2007 15:42:10 -0400 Received: from shawidc-mo1.cg.shawcable.net ([24.71.223.10]:65235 "EHLO pd2mo3so.prod.shaw.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751410AbXFXTmI (ORCPT ); Sun, 24 Jun 2007 15:42:08 -0400 Date: Sun, 24 Jun 2007 13:42:01 -0600 From: Robert Hancock Subject: Re: hsm violation In-reply-to: To: Andrew Morton Cc: enricoss@tiscali.it, linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, Jeff Garzik , Tejun Heo Message-id: <467EC909.9040006@shaw.ca> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7bit References: User-Agent: Thunderbird 2.0.0.4 (Windows/20070604) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1341 Lines: 32 Andrew Morton wrote: > On Sun, 24 Jun 2007 14:32:22 +0200 Enrico Sardi wrote: >> [ 61.176000] ata1.00: exception Emask 0x2 SAct 0x2 SErr 0x0 action 0x2 >> frozen >> [ 61.176000] ata1.00: (spurious completions during NCQ issue=0x0 >> SAct=0x2 FIS=005040a1:00000004) .. > > It's not obvious (to me) whether this is a driver bug, a hardware bug, > expected-normal-behaviour or what - those diagnostics (which we get to > see distressingly frequently) are pretty obscure. The spurious completions during NCQ error is indicating that the drive has indicated it's completed NCQ command tags which weren't outstanding. It's normally a result of a bad NCQ implementation on the drive. Technically we can live with it, but it's rather dangerous (if it indicates completions for non-outstanding commands, how do we know it doesn't indicate completions for actually outstanding commands that aren't actually completed yet..) -- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from hancockr@nospamshaw.ca Home Page: http://www.roberthancock.com/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/