On Tue, Feb 18, 2014 at 12:05:19PM +0100, Paolo Bonzini wrote: > Il 18/02/2014 11:51, Michael S. Tsirkin ha scritto: > >>> I agree it's either COW breaking or (similarly) locking pages that > >>> the guest hasn't touched yet. > >>> > >>> You can use prealloc or "-rt mlock=on" to avoid this problem. > >>> > >>> Paolo > >Or the new shared flag - IIRC shared VMAs don't do COW either. > > Only if the problem isn't locking and zeroing of untouched pages > (also, it is not upstream is it?). No but it's a small patch - part of vhost user patchset. > Can you make a profile with perf? > > Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
