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Code Issues Releases Wiki Activity

zsmalloc: use copy_page for full page copy 

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.

Link: https://lkml.kernel.org/r/20231006060245.7411-1-mark-pk.tsai@mediatek.com
Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: YJ Chiang <yj.chiang@mediatek.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Mark-PK Tsai 2023-10-06 14:02:40 +08:00 committed by Andrew Morton
parent bafd7e9d35
commit afb2d666d0
1 changed files with 1 additions and 1 deletions
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2
mm/zsmalloc.c
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@ -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;