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Btrfs: dev-replace: skip prealloc extents when copy nocow pages 

It doens't make sense to process prealloc extents as pages will be
filled with zero when reading prealloc extents.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
hifive-unleashed-5.1
Liu Bo 2018-02-27 18:10:58 -07:00 committed by David Sterba
parent d612ac59ef
commit ed5d5f37e6
1 changed files with 2 additions and 1 deletions
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3
fs/btrfs/scrub.c
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@ -4480,7 +4480,8 @@ static int check_extent_to_block(struct btrfs_inode *inode, u64 start, u64 len,
* move on to the next inode.
*/
if (em->block_start > logical ||
em->block_start + em->block_len < logical + len) {
em->block_start + em->block_len < logical + len ||
test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {
free_extent_map(em);
ret = 1;
goto out_unlock;