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| author |   Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2009-02-18 00:11:28 -0800 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2009-03-29 23:36:03 -0700 |
| commit | 252a6bf2a3a7e7add56b17d48aecf3f3ef213103 (patch) | |
| tree | 78d2cf00c73c4325e024ff00be0bb0f487865859 | |
| parent | x86/paravirt: allow preemption with lazy mmu mode (diff) | |
| download | linux-dev-252a6bf2a3a7e7add56b17d48aecf3f3ef213103.tar.xz linux-dev-252a6bf2a3a7e7add56b17d48aecf3f3ef213103.zip | |
mm: allow preemption in apply_to_pte_range
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>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
| -rw-r--r-- | mm/memory.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/mm/memory.c b/mm/memory.c index b80cc31292b1..baa999e87cd2 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1718,7 +1718,6 @@ 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); @@ -1730,7 +1729,6 @@ 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); |