Link: https://lore.kernel.org/r/CAOUHufY91Eju-g1+xbUsGkGZ-cwBm78v+S_Air7Cp8mAnYJVYA@xxxxxxxxxxxxxx/ Suggested-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Yu Zhao <yuzhao@xxxxxxxxxx> --- include/linux/mm_types.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 882c31e03cca..500e536796ca 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -18,7 +18,6 @@ #include <linux/page-flags-layout.h> #include <linux/workqueue.h> #include <linux/seqlock.h> -#include <linux/mmdebug.h> #include <asm/mmu.h> @@ -770,6 +769,11 @@ static inline void lru_gen_init_mm(struct mm_struct *mm) static inline void lru_gen_use_mm(struct mm_struct *mm) { + /* + * When the bitmap is set, page reclaim knows this mm_struct has been + * used since the last time it cleared the bitmap. So it might be worth + * walking the page tables of this mm_struct to clear the accessed bit. + */ WRITE_ONCE(mm->lru_gen.bitmap, -1); } -- 2.37.3.968.ga6b4b080e4-goog
