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* [PATCH v2] mm: use update_mmu_tlb() on the second thread
@ 2022-09-26 11:56 Qi Zheng
  2022-09-26 14:34 ` David Hildenbrand
  0 siblings, 1 reply; 8+ messages in thread
From: Qi Zheng @ 2022-09-26 11:56 UTC (permalink / raw)
  To: akpm, muchun.song, david
  Cc: chris, jcmvbkbc, maobibo, linux-mm, linux-kernel, Qi Zheng, Muchun Song

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.

Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
---
v1: https://lore.kernel.org/lkml/20220924053239.91661-1-zhengqi.arch@bytedance.com/

Changelog in v1 -> v2:
 - change the subject and commit message (David)

 mm/memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory.c b/mm/memory.c
index 118e5f023597..9e11c783ba0e 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4122,7 +4122,7 @@ 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;
 	}
 
-- 
2.20.1



^ permalink raw reply related	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2022-09-29  8:43 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-09-26 11:56 [PATCH v2] mm: use update_mmu_tlb() on the second thread Qi Zheng
2022-09-26 14:34 ` David Hildenbrand
2022-09-29  3:07   ` Qi Zheng
2022-09-29  3:27     ` maobibo
2022-09-29  3:47       ` Qi Zheng
2022-09-29  4:05         ` maobibo
2022-09-29  8:38           ` 陈华才
2022-09-29  8:42             ` Qi Zheng

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