From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:42452) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SDDZ7-0000mA-BG for qemu-devel@nongnu.org; Thu, 29 Mar 2012 07:30:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SDDZ1-00072L-4d for qemu-devel@nongnu.org; Thu, 29 Mar 2012 07:30:52 -0400 Received: from alpha.arachsys.com ([91.203.57.7]:36733) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SDDZ0-000726-Up for qemu-devel@nongnu.org; Thu, 29 Mar 2012 07:30:47 -0400 Date: Thu, 29 Mar 2012 12:30:42 +0100 From: Chris Webb Message-ID: <20120329113041.GP5511@arachsys.com> References: <1332949439-6781-1-git-send-email-stefanha@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1332949439-6781-1-git-send-email-stefanha@linux.vnet.ibm.com> Subject: Re: [Qemu-devel] [PATCH 0/2] ide: convert pio code path to asynchronous I/O List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Stefan Hajnoczi Cc: Kevin Wolf , Richard Davies , Zhi Yong Wu , qemu-devel@nongnu.org, Paolo Bonzini Stefan Hajnoczi writes: > Chris and Richard: Please test this to confirm that it fixes the hang you > reported. We've been testing this (v1 against qemu-kvm 1.0) today, and it's looking very good. Thanks! The lock-ups during boot no longer happen, and if you severely throttle (1MB/s, 100 req/s) a guest in the middle of a big dd, there are lots of nasty kernel messages as it falls back to pio mode, but the guest doesn't lock up and qemu remains responsive. Best wishes, Chris.