On Thu, Jun 18, 2015 at 01:50:32PM +0200, Paolo Bonzini wrote: > > > On 18/06/2015 13:41, Michael S. Tsirkin wrote: > > On Thu, Jun 18, 2015 at 01:39:12PM +0200, Igor Mammedov wrote: > >> Lets leave decision upto users instead of making them live with > >> crashing guests. > > > > Come on, let's fix it in userspace. > > It's not trivial to fix it in userspace. Since QEMU uses RCU there > isn't a single memory map to use for a linear gpa->hva map. Could you elaborate? I'm confused by this mention of RCU. You use RCU for accesses to the memory map, correct? So memory map itself is a write side operation, as such all you need to do is take some kind of lock to prevent conflicting with other memory maps, do rcu sync under this lock. > I find it absurd that we're fighting over 12K of memory. > > Paolo I wouldn't worry so much if it didn't affect kernel/userspace API. Need to be careful there. -- MST -- 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
