From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1F7Ha7-0003hJ-7M for qemu-devel@nongnu.org; Thu, 09 Feb 2006 14:35:55 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1F7Ha3-0003g7-Dm for qemu-devel@nongnu.org; Thu, 09 Feb 2006 14:35:53 -0500 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1F7Ha2-0003fo-V9 for qemu-devel@nongnu.org; Thu, 09 Feb 2006 14:35:51 -0500 Received: from [216.148.227.154] (helo=rwcrmhc14.comcast.net) by monty-python.gnu.org with esmtp (Exim 4.52) id 1F7Hde-0005SG-Et for qemu-devel@nongnu.org; Thu, 09 Feb 2006 14:39:34 -0500 Message-ID: <43EB9994.6080105@win4lin.com> Date: Thu, 09 Feb 2006 13:35:48 -0600 From: "Leonardo E. Reiter" MIME-Version: 1.0 Subject: Re: [Qemu-devel] [PATCH] -win2k-hack performance+DMA support References: <43E251A3.2070706@win4lin.com> <43EB4BC9.3030002@wasp.net.au> In-Reply-To: <43EB4BC9.3030002@wasp.net.au> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org No problem... hopefully Fabrice will apply this patch to CVS soon. We've been testing/deploying this mechanism (every 16th interrupt) with Win4Lin Pro for a long time now with no disk full problems, so I can vouch that it's reliable (and quite fast compared to delaying on *every* interrupt). As for the DMA reintroducing the problem, that's understandable since Fabrice didn't originally implement the win2k_install_hack check for the DMA callback in hw/ide.c. It was a moot point since DMA didn't work with Windows 2000 anyway in QEMU CVS until very recently, but since it does now, it will cause problems unless it handles -win2k-hack as well. - Leo Reiter Brad Campbell wrote: > Using todays CVS, and kqemu in user mode only I tried to install > Win2k-SP4 25 times all with disk full errors until I applied this patch. > It would appear the installer will use DMA mode if it's available and > therefore the existing win2k-hack does not work. > > Using this patch 5 out of 5 installs worked perfectly. > > Thanks Leo :) > > Regards, > Brad -- Leonardo E. Reiter Vice President of Product Development, CTO Win4Lin, Inc. Virtual Computing from Desktop to Data Center Main: +1 512 339 7979 Fax: +1 512 532 6501 http://www.win4lin.com