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| author |   Miaohe Lin <linmiaohe@huawei.com> | 2022-07-04 21:21:58 +0800 |
|---|---|---|
| committer |   akpm <akpm@linux-foundation.org> | 2022-07-17 17:14:46 -0700 |
| commit | 121c1781aeb00475d163246d9ae7d8746e377040 (patch) | |
| tree | 568d8b74c41f19eda2f7cb945f488a75d2082894 | |
| parent | mm/huge_memory: minor cleanup for split_huge_pages_all (diff) | |
| download | linux-dev-121c1781aeb00475d163246d9ae7d8746e377040.tar.xz linux-dev-121c1781aeb00475d163246d9ae7d8746e377040.zip | |
mm/huge_memory: fix comment of page_deferred_list
The current comment is confusing because if global or memcg deferred list
in the second tail page is occupied by compound_head, why we still use
page[2].deferred_list here? I think it wants to say that Global or memcg
deferred list in the first tail page is occupied by compound_mapcount and
compound_pincount so we use the second tail page's deferred_list instead.
Link: https://lkml.kernel.org/r/20220704132201.14611-14-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zach O'Keefe <zokeefe@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | include/linux/huge_mm.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 12b297f9951d..37f2f11a6d7e 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -294,8 +294,8 @@ static inline bool thp_migration_supported(void) static inline struct list_head *page_deferred_list(struct page *page) { /* - * Global or memcg deferred list in the second tail pages is - * occupied by compound_head. + * See organization of tail pages of compound page in + * "struct page" definition. */ return &page[2].deferred_list; } |