Messages in this thread Patch in this message | | | Date | Mon, 8 Apr 2024 19:12:03 +0800 | From | Zhaoyu Liu <> | Subject | [PATCH] mm: swap: calculate pages via roundup() in __swapin_nr_pages() |
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Use roundup() to replace while&shift. When the "pages" is large, using roundup() will be faster than while&shift.
Signed-off-by: Zhaoyu Liu <liuzhaoyu.zackary@bytedance.com> --- mm/swap_state.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/mm/swap_state.c b/mm/swap_state.c index 642c30d8376c..d34dc95d0910 100644 --- a/mm/swap_state.c +++ b/mm/swap_state.c @@ -590,12 +590,8 @@ static unsigned int __swapin_nr_pages(unsigned long prev_offset, */ if (offset != prev_offset + 1 && offset != prev_offset - 1) pages = 1; - } else { - unsigned int roundup = 4; - while (roundup < pages) - roundup <<= 1; - pages = roundup; - } + } else + pages = roundup(pages, 4); if (pages > max_pages) pages = max_pages; -- 2.25.1
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