From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55955) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YIH1O-0000Qj-KM for qemu-devel@nongnu.org; Mon, 02 Feb 2015 08:26:35 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YIH1K-0005uW-LM for qemu-devel@nongnu.org; Mon, 02 Feb 2015 08:26:34 -0500 Received: from mx1.redhat.com ([209.132.183.28]:46943) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YIH1K-0005uM-E2 for qemu-devel@nongnu.org; Mon, 02 Feb 2015 08:26:30 -0500 Date: Mon, 2 Feb 2015 14:26:23 +0100 From: Kevin Wolf Message-ID: <20150202132623.GD9478@noname.redhat.com> References: <1422607337-25335-1-git-send-email-den@openvz.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1422607337-25335-1-git-send-email-den@openvz.org> Subject: Re: [Qemu-devel] [PATCH v6 0/7] eliminate data write in bdrv_write_zeroes on Linux in raw-posix.c List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Denis V. Lunev" Cc: Fam Zheng , Peter Lieven , qemu-devel@nongnu.org, Stefan Hajnoczi , Max Reitz Am 30.01.2015 um 09:42 hat Denis V. Lunev geschrieben: > I have performed several tests with non-aligned fallocate calls and > in all cases (with non-aligned fallocates) Linux performs fine, i.e. > areas are zeroed correctly. Checks were made on > Linux 3.16.0-28-generic #38-Ubuntu SMP > > This should seriously increase performance of bdrv_write_zeroes Thanks, applied all to the block branch. Note that I'm hoping to remove patch 7/7 from the queue again if we come to the conclusion that changing the global default instead makes more sense. Kevin