From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36709) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bwV50-0006md-Cn for qemu-devel@nongnu.org; Tue, 18 Oct 2016 10:09:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bwV4z-00034c-J2 for qemu-devel@nongnu.org; Tue, 18 Oct 2016 10:09:22 -0400 Date: Tue, 18 Oct 2016 16:09:12 +0200 From: Kevin Wolf Message-ID: <20161018140912.GJ4706@noname.str.redhat.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Subject: Re: [Qemu-devel] [PATCH 0/2] Correct access to wrong BlockBackendPublic structures List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alberto Garcia Cc: qemu-devel@nongnu.org, qemu-block@nongnu.org, qemu-stable@nongnu.org, Paolo Bonzini Am 17.10.2016 um 17:46 hat Alberto Garcia geschrieben: > Hi all, > > Paolo found that commit 27ccdd52598290f introduced a regression in the > throttling code. > > It can be easily reproduced in scenarios where you have a throttling > group with several drives but you only write to one of them. In that > case the round-robin algorithm can select the wrong drive all the time > and the actual requests are never completed. > > QEMU 2.7 is affected, here's the patch to fix it, plus a test case. Thanks, applied to the block branch. Kevin