在 2020/3/4 上午11:13, Hillf Danton 写道: >> * Nobody should be changing or seriously looking at >> * page->mem_cgroup at this point: >> @@ -2633,8 +2611,13 @@ static void commit_charge(struct page *page, struct mem_cgroup *memcg, >> */ >> page->mem_cgroup = memcg; >> > Well it is likely to update memcg for page without lru_lock held even if > more care is required, which is a change added in the current semantic and > worth a line of words in log. > the lru_lock is guard for lru list, not for page->mem_cgroup, seem no need to highlight this point. Do we? Thanks Alex
