From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42583) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ya3fp-0003TV-U3 for qemu-devel@nongnu.org; Mon, 23 Mar 2015 10:49:55 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Ya3fk-0002rG-CP for qemu-devel@nongnu.org; Mon, 23 Mar 2015 10:49:49 -0400 Received: from mail-wi0-x232.google.com ([2a00:1450:400c:c05::232]:33384) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ya3fk-0002rA-2G for qemu-devel@nongnu.org; Mon, 23 Mar 2015 10:49:44 -0400 Received: by wixw10 with SMTP id w10so36187081wix.0 for ; Mon, 23 Mar 2015 07:49:43 -0700 (PDT) Sender: Paolo Bonzini Message-ID: <55102804.20808@redhat.com> Date: Mon, 23 Mar 2015 15:49:40 +0100 From: Paolo Bonzini MIME-Version: 1.0 References: <1427088255-29885-1-git-send-email-famz@redhat.com> <20150323135612.GI9268@stefanha-thinkpad.redhat.com> <55101C22.6040108@redhat.com> In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH v2] block: Switch to host monotonic clock for IO throttling List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Stefan Hajnoczi Cc: Kevin Wolf , Fam Zheng , Alberto Garcia , qemu-devel , Stefan Hajnoczi On 23/03/2015 15:28, Stefan Hajnoczi wrote: > I'd like to know what problems exactly this patch fixes. The test > case for throttling actually relies on the virtual clock so it can be > stepped deterministically. What other legitimate cases are there > where throttling is used outside a running qemu-system process? Alberto brought up block jobs. It is debatable whether block jobs should be stopped while the VM is. Paolo