> From: David Vrabel [mailto:david.vra...@citrix.com] > Sent: Wednesday, April 13, 2016 12:20 AM > > Holding the p2m lock while calling ept_sync_domain() is very expensive > since it does an on_selected_cpus() call. IPIs on many socket > machines can be very slow and on_selected_cpus() is serialized. > > It is safe to defer the invalidate until the p2m lock is released > except for two cases: > > 1. When freeing a page table page (since partial translations may be > cached). > 2. When reclaiming a zero page as part of PoD. > > For these cases, add p2m_tlb_flush_sync() calls which will immediately > perform the invalidate before the page is freed or reclaimed. > > Signed-off-by: David Vrabel <david.vra...@citrix.com>
Acked-by: Kevin Tian <kevin.t...@intel.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
