xen: lazy-mmu operations

This patch uses the lazy-mmu hooks to batch mmu operations where
possible.  This is primarily useful for batching operations applied to
active pagetables, which happens during mprotect, munmap, mremap and
the like (mmap does not do bulk pagetable operations, so it isn't
helped).

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/i386/xen/multicalls.c b/arch/i386/xen/multicalls.c
index d4015a9ed46..c837e8e463d 100644
--- a/arch/i386/xen/multicalls.c
+++ b/arch/i386/xen/multicalls.c
@@ -26,8 +26,8 @@
 
 #include "multicalls.h"
 
-#define MC_BATCH        8
-#define MC_ARGS         (MC_BATCH * 32 / sizeof(u64))
+#define MC_BATCH        32
+#define MC_ARGS         (MC_BATCH * 16 / sizeof(u64))
 
 struct mc_buffer {
         struct multicall_entry entries[MC_BATCH];