Commit 4e46a023 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: retry ENOMEM for quota_read|write 



This gives another chance to read or write quota data.

Reviewed-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 57864ae5

fs/f2fs/super.c

+13 −3
Original line number Diff line number Diff line
@@ -1321,8 +1321,13 @@ static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data, 
		tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);

repeat:

		page = read_mapping_page(mapping, blkidx, NULL);

		if (IS_ERR(page))

		if (IS_ERR(page)) {

			if (PTR_ERR(page) == -ENOMEM) {

				congestion_wait(BLK_RW_ASYNC, HZ/50);

				goto repeat;

			}

			return PTR_ERR(page);

		}



		lock_page(page);
@@ -1365,11 +1370,16 @@ static ssize_t f2fs_quota_write(struct super_block *sb, int type, 
	while (towrite > 0) {

		tocopy = min_t(unsigned long, sb->s_blocksize - offset,

								towrite);



retry:

		err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,

							&page, NULL);

		if (unlikely(err))

		if (unlikely(err)) {

			if (err == -ENOMEM) {

				congestion_wait(BLK_RW_ASYNC, HZ/50);

				goto retry;

			}

			break;

		}



		kaddr = kmap_atomic(page);

		memcpy(kaddr + offset, data, tocopy);