Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 4212c0f7 authored by Yunlei He's avatar Yunlei He Committed by Jaegeuk Kim
Browse files

f2fs: add a case of no need to read a page in write begin 



If the range we write cover the whole valid data in the last page,
we do not need to read it.

Signed-off-by: default avatarYunlei He <heyunlei@huawei.com>
[Jaegeuk Kim: nullify the remaining area (fix: xfstests/f2fs/001)]
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent e82207d3

fs/f2fs/data.c

+6 −1
Original line number Diff line number Diff line
@@ -1712,6 +1712,11 @@ repeat: 
	if (len == PAGE_SIZE || PageUptodate(page))

		return 0;



	if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode)) {

		zero_user_segment(page, len, PAGE_SIZE);

		return 0;

	}



	if (blkaddr == NEW_ADDR) {

		zero_user_segment(page, 0, PAGE_SIZE);

		SetPageUptodate(page);
@@ -1765,7 +1770,7 @@ static int f2fs_write_end(struct file *file, 
	 * let generic_perform_write() try to copy data again through copied=0.

	 */

	if (!PageUptodate(page)) {

		if (unlikely(copied != PAGE_SIZE))

		if (unlikely(copied != len))

			copied = 0;

		else

			SetPageUptodate(page);