Messages in this thread Patch in this message | | | From | Muchun Song <> | Subject | [PATCH v4 3/5] mm: memcontrol: change ug->dummy_page only if memcg changed | Date | Thu, 18 Mar 2021 19:06:56 +0800 |
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Just like assignment to ug->memcg, we only need to update ug->dummy_page if memcg changed. So move it to there. This is a very small optimization.
Signed-off-by: Muchun Song <songmuchun@bytedance.com> --- mm/memcontrol.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index fc22da9805fb..104bddf21314 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -6845,6 +6845,7 @@ static void uncharge_page(struct page *page, struct uncharge_gather *ug) uncharge_gather_clear(ug); } ug->memcg = page_memcg(page); + ug->dummy_page = page; /* pairs with css_put in uncharge_batch */ css_get(&ug->memcg->css); @@ -6858,7 +6859,6 @@ static void uncharge_page(struct page *page, struct uncharge_gather *ug) else ug->pgpgout++; - ug->dummy_page = page; page->memcg_data = 0; css_put(&ug->memcg->css); } -- 2.11.0
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