On Thu, Mar 12, 2015 at 06:16:49PM +0000, Marc Zyngier wrote: > So far, KVM/arm doesn't implement any support for page aging, leading > to rather bad performance when the system is swapping. This short > series implements the required hooks and fault handling to deal with > pages being marked old/young. > > The three patches are fairly straightforward: > > - First patch changes the range iterator to be able to return a value > > - Second patch implements the actual page aging (clearing the AF bit > in the page tables, and relying on the normal faulting code to set > the bit again). > > - Last patch optimizes the access fault path by only doing the minimum > to satisfy the fault. > > The end result is a system that behaves visibly better under load, as > VM pages don't get evicted that easily. > > Based on 4.0-rc3, tested on Seattle and X-Gene. > > Also at git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git kvm-arm64/page-aging > > * From v1 [1]: > - Removed all TLBIs from kvm_age_hva_handler, as the core KVM code > already does use quite a large hammer to nuke the TLBs on its own > - Don't mark old a page that is already old > - Rebased on top of 4.0-rc3 > Thanks, applied to queue! -Christoffer -- 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
