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From: | Juan Quintela |
Subject: | Re: [Qemu-devel] [PATCH v9 44/56] Postcopy: Use helpers to map pages during migration |
Date: | Mon, 09 Nov 2015 12:19:55 +0100 |
User-agent: | Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) |
"Dr. David Alan Gilbert (git)" <address@hidden> wrote: > From: "Dr. David Alan Gilbert" <address@hidden> > > In postcopy, the destination guest is running at the same time > as it's receiving pages; as we receive new pages we must put > them into the guests address space atomically to avoid a running > CPU accessing a partially written page. > > Use the helpers in postcopy-ram.c to map these pages. > > qemu_get_buffer_in_place is used to avoid a copy out of qemu_file > in the case that postcopy is going to do a copy anyway. > > Signed-off-by: Dr. David Alan Gilbert <address@hidden> Reviewed-by: Juan Quintela <address@hidden>
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