Filesystems can call sb_issue_discard on a memory reclaim path
(e.g. ext4 calls sb_issue_discard during journal commit).
Use GFP_NOFS in sb_issue_discard to avoid recursing back into the FS.
Reported-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
---
include/linux/blkdev.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index baf5258..dbb510c 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -933,7 +933,7 @@ static inline int sb_issue_discard(struct super_block *sb,
{
block <<= (sb->s_blocksize_bits - 9);
nr_blocks <<= (sb->s_blocksize_bits - 9);
- return blkdev_issue_discard(sb->s_bdev, block, nr_blocks, GFP_KERNEL,
+ return blkdev_issue_discard(sb->s_bdev, block, nr_blocks, GFP_NOFS,
BLKDEV_IFL_WAIT | BLKDEV_IFL_BARRIER);
}
--
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