From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e28smtp08.in.ibm.com (e28smtp08.in.ibm.com [122.248.162.8]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 597C51A0163 for ; Tue, 8 Sep 2015 20:01:33 +1000 (AEST) Received: from /spool/local by e28smtp08.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 8 Sep 2015 15:31:29 +0530 Received: from d28relay04.in.ibm.com (d28relay04.in.ibm.com [9.184.220.61]) by d28dlp02.in.ibm.com (Postfix) with ESMTP id 776C93940049 for ; Tue, 8 Sep 2015 15:31:27 +0530 (IST) Received: from d28av02.in.ibm.com (d28av02.in.ibm.com [9.184.220.64]) by d28relay04.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t88A188n41812074 for ; Tue, 8 Sep 2015 15:31:09 +0530 Received: from d28av02.in.ibm.com (localhost [127.0.0.1]) by d28av02.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t88A150m012721 for ; Tue, 8 Sep 2015 15:31:08 +0530 Date: Tue, 8 Sep 2015 15:30:30 +0530 From: Bharata B Rao To: "Dr. David Alan Gilbert" Cc: Michael Ellerman , Andrea Arcangeli , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, qemu-devel@nongnu.org, kvm@vger.kernel.org, linux-api@vger.kernel.org, zhang.zhanghailiang@huawei.com, Pavel Emelyanov , Johannes Weiner , Hugh Dickins , Sanidhya Kashyap , Dave Hansen , Andres Lagar-Cavilla , Mel Gorman , Paolo Bonzini , "Kirill A. Shutemov" , "Huangpeng (Peter)" , Andy Lutomirski , Linus Torvalds , Peter Feiner , linuxppc-dev@lists.ozlabs.org Subject: Re: [Qemu-devel] [PATCH 19/23] userfaultfd: activate syscall Message-ID: <20150908095915.GC678@in.ibm.com> Reply-To: bharata@linux.vnet.ibm.com References: <1431624680-20153-1-git-send-email-aarcange@redhat.com> <1431624680-20153-20-git-send-email-aarcange@redhat.com> <20150811100728.GB4587@in.ibm.com> <20150811134826.GI4520@redhat.com> <20150812052346.GC4587@in.ibm.com> <1441692486.14597.17.camel@ellerman.id.au> <20150908063948.GB678@in.ibm.com> <20150908085946.GC2246@work-vm> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20150908085946.GC2246@work-vm> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Tue, Sep 08, 2015 at 09:59:47AM +0100, Dr. David Alan Gilbert wrote: > * Bharata B Rao (bharata@linux.vnet.ibm.com) wrote: > > In fact I had successfully done postcopy migration of sPAPR guest with > > this setup. > > Interesting - I'd not got that far myself on power; I was hitting a problem > loading htab ( htab_load() bad index 2113929216 (14848+0 entries) in htab stream (htab_shift=25) ) > > Did you have to make any changes to the qemu code to get that happy? I should have mentioned that I tried only QEMU driven migration within the same host using wp3-postcopy branch of your tree. I don't see the above issue. (qemu) info migrate capabilities: xbzrle: off rdma-pin-all: off auto-converge: off zero-blocks: off compress: off x-postcopy-ram: on Migration status: completed total time: 39432 milliseconds downtime: 162 milliseconds setup: 14 milliseconds transferred ram: 1297209 kbytes throughput: 270.72 mbps remaining ram: 0 kbytes total ram: 4194560 kbytes duplicate: 734015 pages skipped: 0 pages normal: 318469 pages normal bytes: 1273876 kbytes dirty sync count: 4 I will try migration between different hosts soon and check. Regards, Bharata.