On Wed, Jul 10, 2013 at 12:45:59PM +0200, Alexander Graf wrote: > > On 10.07.2013, at 12:42, Gleb Natapov wrote: > > > On Wed, Jul 10, 2013 at 12:39:01PM +0200, Alexander Graf wrote: > >> > >> On 09.07.2013, at 18:01, Christian Borntraeger wrote: > >> > >>> On 09/07/13 15:56, Dominik Dingel wrote: > >>>> By setting a Kconfig option, the architecture can control when > >>>> guest notifications will be presented by the apf backend. > >>>> So there is the default batch mechanism, working as before, where the vcpu thread > >>>> should pull in this information. On the other hand there is now the direct > >>>> mechanism, this will directly push the information to the guest. > >>>> > >>>> Still the vcpu thread should call check_completion to cleanup leftovers, > >>>> that leaves most of the common code untouched. > >>>> > >>>> Signed-off-by: Dominik Dingel <dingel@xxxxxxxxxxxxxxxxxx> > >>> > >>> Acked-by: Christian Borntraeger <borntraeger@xxxxxxxxxx> > >>> for the "why". We want to use the existing architectured interface. > >> > >> Shouldn't this be a runtime option? > >> > > Why? What is the advantage of using sync delivery when HW can do it > > async? > > What's the advantage of having an option at all then? Who selects it? > x86 is stupid and cannot deliver the even asynchronously. Platform that can do it select the option. -- Gleb. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>