From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44984) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YrmAo-0003bE-2O for qemu-devel@nongnu.org; Mon, 11 May 2015 07:47:02 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YrmAk-0006ID-Tq for qemu-devel@nongnu.org; Mon, 11 May 2015 07:47:02 -0400 Received: from mail-wi0-x234.google.com ([2a00:1450:400c:c05::234]:35884) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YrmAk-0006Ho-OE for qemu-devel@nongnu.org; Mon, 11 May 2015 07:46:58 -0400 Received: by wizk4 with SMTP id k4so101996608wiz.1 for ; Mon, 11 May 2015 04:46:58 -0700 (PDT) Sender: Paolo Bonzini Message-ID: <555096AE.2070706@redhat.com> Date: Mon, 11 May 2015 13:46:54 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <1050461611.181154015.1431344303354.JavaMail.zimbra@oxygem.tv> In-Reply-To: <1050461611.181154015.1431344303354.JavaMail.zimbra@oxygem.tv> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] qmp block-mirror hang, lots of nfs op/s on nfs source disk List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alexandre DERUMIER , qemu-devel , Fam Zheng On 11/05/2015 13:38, Alexandre DERUMIER wrote: > Hi, > > I'm currently playing with drive-mirror, (qemu 2.2) > > and I have qmp hang when drive-mirror is starting. > > just after qmp "drive-mirror" exec, qmp socket or hmp are not > responding. > > After some times it's working again, and I can see result of > query-block-jobs. > > > The source volume is on nfs (v4), and it seem that the bigger the > volume is, the bigger I need to wait before the mirror begin. That is because drive-mirror checks the whole disk for allocated areas. We are aware of that and Fam (CCed) is working on it. Thanks for the report nevertheless! Paolo