From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34000) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YfVCl-00072D-Mn for qemu-devel@nongnu.org; Tue, 07 Apr 2015 11:14:24 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YfVCg-0000Ud-NL for qemu-devel@nongnu.org; Tue, 07 Apr 2015 11:14:19 -0400 Message-ID: <5523F43B.2070707@redhat.com> Date: Tue, 07 Apr 2015 17:14:03 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <5522D4BD.7080805@kamp.de> <5522D57B.3000203@redhat.com> <5522D85D.20907@kamp.de> <5522DA21.1010702@kamp.de> <20150407084303.GA2298@work-vm> <5523F38A.4090305@kamp.de> In-Reply-To: <5523F38A.4090305@kamp.de> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [Qemu-block] Migration sometimes fails with IDE and Qemu 2.2.1 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Lieven , "Dr. David Alan Gilbert" Cc: John Snow , "qemu-devel@nongnu.org" , qemu-block@nongnu.org On 07/04/2015 17:11, Peter Lieven wrote: > > I'm not sure at what kernel version the switch is, but newer kernels use some > > code shared with the newer SATA world (libata?) where as older kernels had > > separate IDE code, so the behaviour of the two can be quite different. > > Thats a good point. I will check what the kernels have. > I remember that there was sth like a problem with error handling in > the old drivers? Paolo, you worked a lot on IDE lately. Do you remember? No, I don't know... I didn't work a lot on IDE, those patches were all several years old and finally John shepherded them in. :) Still, what David says is correct. At least RHEL5's 2.6.18 defaulted to the old IDE drivers (/dev/hdXNN). Paolo