From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux Memory Management List <linux-mm@kvack.org>,
"Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>
Subject: [PATCH 2/2] mm/apply_to_range: call pte function with lazy updates
Date: Thu, 13 Nov 2008 09:19:49 -0800 [thread overview]
Message-ID: <491C61B5.7020004@goop.org> (raw)
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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reply other threads:[~2008-11-13 17:19 UTC|newest]
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