From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:54130) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UaiDa-0003kC-GM for qemu-devel@nongnu.org; Fri, 10 May 2013 03:58:19 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UaiDZ-0002kJ-Bg for qemu-devel@nongnu.org; Fri, 10 May 2013 03:58:18 -0400 Received: from mx1.redhat.com ([209.132.183.28]:40296) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UaiDZ-0002jz-4Z for qemu-devel@nongnu.org; Fri, 10 May 2013 03:58:17 -0400 Message-ID: <518CA88E.50002@redhat.com> Date: Fri, 10 May 2013 09:58:06 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <51844811.4030001@hp.com> <518BDADB.1070705@linux.vnet.ibm.com> <518C2135.306@hp.com> In-Reply-To: <518C2135.306@hp.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH v6 00/11] rdma: migration support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Chegu Vinod Cc: Karen Noel , "Michael S. Tsirkin" , Juan Jose Quintela Carreira , qemu-devel qemu-devel , "Michael R. Hines" , Orit Wasserman , "Michael R. Hines" , Anthony Liguori Il 10/05/2013 00:20, Chegu Vinod ha scritto: >> >> Wow, I didn't know that either. Perhaps this must be causing the >> entire QEMU process and its threads to seize up. >> >> It may be necessary to run the pinning command *outside* of QEMU's I/O >> lock in a separate thread if it's really that much overhead. > > Not really sure if the BQL is causing the freeze...but in general > pinning of all memory when the guest is run is perhaps not the best > choice for large enterprise class guests...i.e. its better to do it as > part of the start of the guest. If pinning is done in the setup phase, it should run outside the BQL. Paolo