From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43740) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cv0iK-0006xX-Kv for qemu-devel@nongnu.org; Mon, 03 Apr 2017 08:04:05 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cv0iH-0007SJ-If for qemu-devel@nongnu.org; Mon, 03 Apr 2017 08:04:04 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41436) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cv0iH-0007S5-DC for qemu-devel@nongnu.org; Mon, 03 Apr 2017 08:04:01 -0400 Message-ID: <1491221026.17505.39.camel@redhat.com> From: Gerd Hoffmann Date: Mon, 03 Apr 2017 14:03:46 +0200 In-Reply-To: References: <1490856931-21732-1-git-send-email-kraxel@redhat.com> <1490881315.28523.11.camel@redhat.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 Subject: Re: [Qemu-devel] [RfC PATCH 0/4] make display updates thread safe. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini Cc: Mark Cave-Ayland , Alex =?ISO-8859-1?Q?Benn=E9e?= , qemu-devel@nongnu.org Hi, > I checked the branch, is bitmap_copy_and_clear_atomic correct when you > have partial updates? Maybe you need to handle partial updates of the > first and last word? Should not be a problem. We might clear some more bits, but these are outsize the visible area so they should cause visible corruption (and if the visible area changes the display code needs to do a full refresh anyway). cheers, Gerd