From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59281) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1flUfd-0004O0-PT for qemu-devel@nongnu.org; Fri, 03 Aug 2018 03:38:46 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1flUfd-0004Lq-0T for qemu-devel@nongnu.org; Fri, 03 Aug 2018 03:38:45 -0400 Date: Fri, 3 Aug 2018 09:38:36 +0200 From: Kevin Wolf Message-ID: <20180803073836.GC4380@localhost.localdomain> References: <20180729212744.23709-1-lbloch@janustech.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180729212744.23709-1-lbloch@janustech.com> Subject: Re: [Qemu-devel] [PATCH 0/6] qcow2: Make the L2 cache cover the whole image by default List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Leonid Bloch Cc: qemu-devel@nongnu.org, qemu-block@nongnu.org, Max Reitz , Eric Blake Am 29.07.2018 um 23:27 hat Leonid Bloch geschrieben: > This series makes the qcow2 L2 cache cover the entire image by default. > The importance of this change is in noticeable performance improvement, > especially with heavy random I/O. The memory overhead is very small: > only 1 MB of cache for every 8 GB of image size. On systems with very > limited RAM the maximal cache size can be limited by the existing > cache-size and l2-cache-size options. > > The L2 cache is also resized accordingly, by default, if the image is > resized. Are you going to send a new version that makes the changes we agreed on? Kevin