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Commit 6a41dd09 authored by Josef Bacik's avatar Josef Bacik Committed by Chris Mason
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Btrfs: account for the correct number of extents for delalloc reservations 



Direct IO can easily pass in an buffer that is greater than
BTRFS_MAX_EXTENT_SIZE, so take this into account when reserving extents in the
delalloc reservation code.  Thanks,

Signed-off-by: default avatarJosef Bacik <jbacik@fb.com>
Signed-off-by: default avatarChris Mason <clm@fb.com>
parent 8461a3de

fs/btrfs/extent-tree.c

+5 −1
Original line number Diff line number Diff line
@@ -5110,7 +5110,11 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes) 
	num_bytes = ALIGN(num_bytes, root->sectorsize);



	spin_lock(&BTRFS_I(inode)->lock);

	BTRFS_I(inode)->outstanding_extents++;

	nr_extents = (unsigned)div64_u64(num_bytes +

					 BTRFS_MAX_EXTENT_SIZE - 1,

					 BTRFS_MAX_EXTENT_SIZE);

	BTRFS_I(inode)->outstanding_extents += nr_extents;

	nr_extents = 0;



	if (BTRFS_I(inode)->outstanding_extents >

	    BTRFS_I(inode)->reserved_extents)