* [PATCH 2/2] mm/apply_to_range: call pte function with lazy updates
@ 2008-11-13 17:19 Jeremy Fitzhardinge
0 siblings, 0 replies; only message in thread
From: Jeremy Fitzhardinge @ 2008-11-13 17:19 UTC (permalink / raw)
To: Andrew Morton
Cc: Nick Piggin, Linux Kernel Mailing List,
Linux Memory Management List, Pallipadi, Venkatesh
Make the pte-level function in apply_to_range be called in lazy mmu
mode, so that any pagetable modifications can be batched.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
mm/memory.c | 4 ++++
1 file changed, 4 insertions(+)
===================================================================
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1545,6 +1545,8 @@
BUG_ON(pmd_huge(*pmd));
+ arch_enter_lazy_mmu_mode();
+
token = pmd_pgtable(*pmd);
do {
@@ -1552,6 +1554,8 @@
if (err)
break;
} while (pte++, addr += PAGE_SIZE, addr != end);
+
+ arch_leave_lazy_mmu_mode();
if (mm != &init_mm)
pte_unmap_unlock(pte-1, ptl);
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2008-11-13 17:19 [PATCH 2/2] mm/apply_to_range: call pte function with lazy updates Jeremy Fitzhardinge
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