From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lan Tianyu Subject: Re: [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver Date: Wed, 25 Nov 2015 13:39:32 +0800 Message-ID: <56554994.1090305@intel.com> References: <1448372298-28386-1-git-send-email-tianyu.lan@intel.com> <1448372298-28386-4-git-send-email-tianyu.lan@intel.com> <20151124230551-mutt-send-email-mst@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: a.motakis-lrHrjnjw1UfHK3s98zE1ajGjJy/sRE9J@public.gmane.org, alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, b.reynal-lrHrjnjw1UfHK3s98zE1ajGjJy/sRE9J@public.gmane.org, bhelgaas-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, carolyn.wyborny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, donald.c.skidmore-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, eddie.dong-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, nrupal.jani-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, agraf-l3A5Bk7waGM@public.gmane.org, kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, pbonzini-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, qemu-devel-qX2TKyscuCcdnm+yROfE0A@public.gmane.org, emil.s.tantilov-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, gerlitz.or-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, mark.d.rustad-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, eric.auger-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, intel-wired-lan-qjLDD68F18P21nG7glBr7A@public.gmane.org, jeffrey.t.kirsher-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, jesse.brandeburg-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, john.ronciak-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, matthew.vick-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, mitch.a.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, shannon.nelson-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, weiyang-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org, zajec5-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org To: "Michael S. Tsirkin" Return-path: In-Reply-To: <20151124230551-mutt-send-email-mst-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org On 2015=E5=B9=B411=E6=9C=8825=E6=97=A5 05:20, Michael S. Tsirkin wrote: > I have to say, I was much more interested in the idea > of tracking dirty memory. I have some thoughts about > that one - did you give up on it then? No, our finial target is to keep VF active before doing migration and tracking dirty memory is essential. But this seems not easy to do that in short term for upstream. As starters, stop VF before migration. After deep thinking, the way of stopping VF still needs tracking DMA-accessed dirty memory to make sure the received data buffer before stopping VF migrated. It's easier to do that via dummy writing data buffer when receive packet. --=20 Best regards Tianyu Lan