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authorQi Zheng <zhengqi.arch@bytedance.com>2022-09-29 13:23:17 +0200
committerAndrew Morton <akpm@linux-foundation.org>2022-10-13 03:51:50 +0200
commitbce8cb3c04dc01d21b6b17baf1cb6c277e7e6848 (patch)
tree14e2a35452ed18698b8fdc986c89c22e4a4a2c53 /mm/memory.c
parentkasan: fix array-bounds warnings in tests (diff)
downloadlinux-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/memory.c')
-rw-r--r--mm/memory.c2
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;
}