Messages in this thread Patch in this message | | | From | Mark-PK Tsai <> | Subject | [PATCH] zsmalloc: use copy_page for full page copy | Date | Fri, 6 Oct 2023 14:02:40 +0800 |
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Some architectures have implemented optimized copy_page for full page copying, such as arm.
On my arm platform, use the copy_page helper for single page copying is about 10 percent faster than memcpy.
Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com> --- mm/zsmalloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index c743ce7a5f49..b1c0dad7f4cf 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -1839,7 +1839,7 @@ static int zs_page_migrate(struct page *newpage, struct page *page, * Here, any user cannot access all objects in the zspage so let's move. */ d_addr = kmap_atomic(newpage); - memcpy(d_addr, s_addr, PAGE_SIZE); + copy_page(d_addr, s_addr); kunmap_atomic(d_addr); for (addr = s_addr + offset; addr < s_addr + PAGE_SIZE; -- 2.18.0
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