Commit-ID: 252a6bf2a3a7e7add56b17d48aecf3f3ef213103 Gitweb: http://git.kernel.org/tip/252a6bf2a3a7e7add56b17d48aecf3f3ef213103 Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx> AuthorDate: Wed, 18 Feb 2009 00:11:28 -0800 Committer: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx> CommitDate: Sun, 29 Mar 2009 23:36:03 -0700 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@xxxxxxxxxx> Acked-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> --- mm/memory.c | 2 -- 1 files changed, 0 insertions(+), 2 deletions(-) diff --git a/mm/memory.c b/mm/memory.c index b80cc31..baa999e 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); -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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