From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerhard Wiesinger Subject: Re: [Qemu-devel] [PATCH] kvm: flush the dirty log when unregistering a slot Date: Wed, 25 Jan 2012 21:15:43 +0100 (CET) Message-ID: References: <1326637051-23920-1-git-send-email-avi@redhat.com> <4F12E232.5090809@web.de> <4F130667.9050609@redhat.com> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: Marcelo Tosatti , Jan Kiszka , qemu-devel@nongnu.org, kvm@vger.kernel.org To: Avi Kivity Return-path: Received: from chello084112167138.7.11.vie.surfer.at ([84.112.167.138]:57255 "EHLO wiesinger.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751025Ab2AYUQ5 (ORCPT ); Wed, 25 Jan 2012 15:16:57 -0500 In-Reply-To: <4F130667.9050609@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On Sun, 15 Jan 2012, Avi Kivity wrote: > On 01/15/2012 04:40 PM, Gerhard Wiesinger wrote: >> On Sun, 15 Jan 2012, Jan Kiszka wrote: >> >>> On 2012-01-15 15:17, Avi Kivity wrote: >>>> Otherwise, the dirty log information is lost in the kernel forever. >>>> >>>> Fixes opensuse-12.1 boot screen, which changes the vga windows rapidly. >>> >>> Confirmed, problems solved here. >> >> Problem from: http://permalink.gmane.org/gmane.comp.emulators.qemu/131853 >> >> Confirmed to be fixed, too. Long awaited patch :-) > > Sorry, I forgot about that. Please ping me if I do that. > >> >> BTW: There is also a major difference in video performance: >> 1.) With Patch: 1400MB/s (MByte/s) >> 2.) Without Patch: 6MB/s >> >> Any reason for that? > > What are you measuring exactly? I'm measuring VGA video performance under DOS with own written test program. What's strange, new findings: Measurement doesn't depend on the patch. Sometimes it is high sometimes low. I think I have to investigate further. Any ideas? BTW: Please merge the patch into qemu-kvm repository. Ciao, Gerhard -- http://www.wiesinger.com/