Messages in this thread Patch in this message | | | From | Jeremy Fitzhardinge <> | Subject | [PATCH 7/8] mm: allow preemption in apply_to_pte_range | Date | Fri, 27 Mar 2009 11:02:42 -0700 |
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From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Impact: allow preemption in apply_to_pte_range updates to init_mm
Preemption is now allowed for lazy mmu mode, so don't disable it for the inner loop of apply_to_pte_range. This only applies when doing updates to init_mm; user pagetables are still modified under the pte lock, so preemption is disabled anyway.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> --- mm/memory.c | 2 -- 1 files changed, 0 insertions(+), 2 deletions(-)
diff --git a/mm/memory.c b/mm/memory.c index 27f8677..ef11ac6 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1722,7 +1722,6 @@ static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd, BUG_ON(pmd_huge(*pmd)); - preempt_disable(); arch_enter_lazy_mmu_mode(); token = pmd_pgtable(*pmd); @@ -1734,7 +1733,6 @@ static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd, } while (pte++, addr += PAGE_SIZE, addr != end); arch_leave_lazy_mmu_mode(); - preempt_enable(); if (mm != &init_mm) pte_unmap_unlock(pte-1, ptl); -- 1.6.0.6
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