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| author | Qi Zheng <zhengqi.arch@bytedance.com> | 2022-09-29 13:23:17 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-10-13 03:51:50 +0200 |
| commit | bce8cb3c04dc01d21b6b17baf1cb6c277e7e6848 (patch) | |
| tree | 14e2a35452ed18698b8fdc986c89c22e4a4a2c53 /mm | |
| parent | kasan: fix array-bounds warnings in tests (diff) | |
| download | linux-bce8cb3c04dc01d21b6b17baf1cb6c277e7e6848.tar.xz linux-bce8cb3c04dc01d21b6b17baf1cb6c277e7e6848.zip | |
mm: use update_mmu_tlb() on the second thread
As message in commit 7df676974359 ("mm/memory.c: Update local TLB if PTE
entry exists") said, we should update local TLB only on the second thread.
So in the do_anonymous_page() here, we should use update_mmu_tlb()
instead of update_mmu_cache() on the second thread.
As David pointed out, this is a performance improvement, not a
correctness fix.
Link: https://lkml.kernel.org/r/20220929112318.32393-2-zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Bibo Mao <maobibo@loongson.cn>
Cc: Chris Zankel <chris@zankel.net>
Cc: Huacai Chen <chenhuacai@loongson.cn>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memory.c b/mm/memory.c index 4ad6077164cd..f88c351aecd4 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -4134,7 +4134,7 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf) vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, vmf->address, &vmf->ptl); if (!pte_none(*vmf->pte)) { - update_mmu_cache(vma, vmf->address, vmf->pte); + update_mmu_tlb(vma, vmf->address, vmf->pte); goto release; } |