On 2017/10/20 0:56, Jaegeuk Kim wrote:
> This gives another chance to read or write quota data.
>
> Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
Reviewed-by: Chao Yu <yuch...@huawei.com>
Thanks,
> ---
> fs/f2fs/super.c | 13 +++++++++++--
> 1 file changed, 11 insertions(+), 2 deletions(-)
>
> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> index fc3b74e53670..2c6e9adce464 100644
> --- a/fs/f2fs/super.c
> +++ b/fs/f2fs/super.c
> @@ -1351,8 +1351,13 @@ 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);
>
> @@ -1395,10 +1400,14 @@ 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 (err == -ENOMEM) {
> + congestion_wait(BLK_RW_ASYNC, HZ/50);
> + goto retry;
> + }
> if (len == towrite)
> return err;
> break;
>
