On Thu, Nov 27, 2014 at 04:29:06PM +0000, Dr. David Alan Gilbert wrote: > * Stefan Hajnoczi (stefa...@redhat.com) wrote: > > The dirty memory bitmap is managed by ram_addr.h and copied to > > migration_bitmap[] periodically during live migration. > > > > Move the code to sync the bitmap to ram_addr.h where related code lives. > > Is this sync code going to need to gain a barrier (although I'm not quite > sure which) to ensure it's picked up all changes?
gcc makes these operations a full barrier: https://gcc.gnu.org/onlinedocs/gcc-4.1.1/gcc/Atomic-Builtins.html Stefan
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