Commit 38e0edb1 authored Jan 06, 2009 by Jeremy Fitzhardinge Committed by Linus Torvalds Jan 06, 2009

mm/apply_to_range: call pte function with lazy updates



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>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent cd52858c

mm/memory.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1645,6 +1645,8 @@ static int apply_to_pte_range(struct mm_struct mm, pmd_t pmd,

		BUG_ON(pmd_huge(*pmd));

		arch_enter_lazy_mmu_mode();

		token = pmd_pgtable(*pmd);

		do {
		@@ -1653,6 +1655,8 @@ static int apply_to_pte_range(struct mm_struct mm, pmd_t pmd,
		break;
		} while (pte++, addr += PAGE_SIZE, addr != end);

		arch_leave_lazy_mmu_mode();

		if (mm != &init_mm)
		pte_unmap_unlock(pte-1, ptl);
		return err;

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