From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38762) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Z5DGD-0005FD-6I for qemu-devel@nongnu.org; Wed, 17 Jun 2015 09:20:13 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Z5DG7-0000NC-HS for qemu-devel@nongnu.org; Wed, 17 Jun 2015 09:20:09 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33553) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Z5DG7-0000MZ-Cr for qemu-devel@nongnu.org; Wed, 17 Jun 2015 09:20:03 -0400 Date: Wed, 17 Jun 2015 13:30:42 +0100 From: "Dr. David Alan Gilbert" Message-ID: <20150617123042.GI2122@work-vm> References: <1434450415-11339-1-git-send-email-dgilbert@redhat.com> <1434450415-11339-2-git-send-email-dgilbert@redhat.com> <87y4ji5zok.fsf@neno.neno> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87y4ji5zok.fsf@neno.neno> Subject: Re: [Qemu-devel] [PATCH v7 01/42] Start documenting how postcopy works. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Juan Quintela Cc: aarcange@redhat.com, yamahata@private.email.ne.jp, liang.z.li@intel.com, qemu-devel@nongnu.org, luis@cs.umu.se, amit.shah@redhat.com, pbonzini@redhat.com, david@gibson.dropbear.id.au * Juan Quintela (quintela@redhat.com) wrote: > "Dr. David Alan Gilbert (git)" wrote: > > From: "Dr. David Alan Gilbert" > > > > Signed-off-by: Dr. David Alan Gilbert > > --- > > docs/migration.txt | 167 +++++++++++++++++++++++++++++++++++++++++++++++++++++ > > 1 file changed, 167 insertions(+) > > > > diff --git a/docs/migration.txt b/docs/migration.txt > > index f6df4be..b4b93d1 100644 > > --- a/docs/migration.txt > > +++ b/docs/migration.txt > > @@ -291,3 +291,170 @@ save/send this state when we are in the middle > > of a pio operation > > (that is what ide_drive_pio_state_needed() checks). If DRQ_STAT is > > not enabled, the values on that fields are garbage and don't need to > > be sent. > > + > > += Return path = > > + > > +In most migration scenarios there is only a single data path that runs > > +from the source VM to the destination, typically along a single fd (although > > +possibly with another fd or similar for some fast way of throwing pages across). > > + > > +However, some uses need two way communication; in particular the > > Postcopy destination > > This line is a bit long O:-) > > In general, we are too near to the 80 columns limit. Thanks, Fixed (interesting, the check-patch doesn't seem to moan about text files). Dave -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK