The patch titled
Subject: zram: use copy_page for full page copy
has been added to the -mm mm-unstable branch. Its filename is
zram-use-copy_page-for-full-page-copy.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/zram-use-copy_page-for-full-page-copy.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Mark-PK Tsai <mark-pk.tsai@xxxxxxxxxxxx>
Subject: zram: use copy_page for full page copy
Date: Sat, 7 Oct 2023 15:05:53 +0800
Some architectures, such as arm, have implemented optimized copy_page for
full page copying.
Replace the full page memcpy with copy_page to take advantage of the
optimization.
Link: https://lkml.kernel.org/r/20231007070554.8657-1-mark-pk.tsai@xxxxxxxxxxxx
Signed-off-by: Mark-PK Tsai <mark-pk.tsai@xxxxxxxxxxxx>
Reviewed-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Matthias Brugger <matthias.bgg@xxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: YJ Chiang <yj.chiang@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/block/zram/zram_drv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/block/zram/zram_drv.c~zram-use-copy_page-for-full-page-copy
+++ a/drivers/block/zram/zram_drv.c
@@ -1337,7 +1337,7 @@ static int zram_read_from_zspool(struct
src = zs_map_object(zram->mem_pool, handle, ZS_MM_RO);
if (size == PAGE_SIZE) {
dst = kmap_local_page(page);
- memcpy(dst, src, PAGE_SIZE);
+ copy_page(dst, src);
kunmap_local(dst);
ret = 0;
} else {
_
Patches currently in -mm which might be from mark-pk.tsai@xxxxxxxxxxxx are
zram-use-copy_page-for-full-page-copy.patch
