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f2fs: retry ENOMEM for quota_read|write 

This gives another chance to read or write quota data.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2017-10-19 09:43:56 -07:00
parent 57864ae5ce
commit 4e46a023c5
1 changed files with 13 additions and 3 deletions
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16
fs/f2fs/super.c
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@ -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);