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Btrfs: don't set and clear delalloc for O_DIRECT writes 

We do this to get the space accounting, but this is just needless churn on the
io_tree, so just drop setting/clearing delalloc and just drop the reserved data
space when we have a successfull allocation.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Josef Bacik 2015-02-11 15:08:58 -05:00 committed by Chris Mason
parent 3e05bde8c3
commit 3266789f9d
1 changed files with 2 additions and 6 deletions
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8
fs/btrfs/inode.c
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@ -7160,7 +7160,7 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
int ret = 0;
if (create)
unlock_bits |= EXTENT_DELALLOC | EXTENT_DIRTY;
unlock_bits |= EXTENT_DIRTY;
else
len = min_t(u64, len, root->sectorsize);
@ -7296,11 +7296,7 @@ unlock:
BTRFS_I(inode)->outstanding_extents++;
spin_unlock(&BTRFS_I(inode)->lock);
}
ret = set_extent_bit(&BTRFS_I(inode)->io_tree, lockstart,
lockstart + len - 1, EXTENT_DELALLOC, NULL,
&cached_state, GFP_NOFS);
BUG_ON(ret);
btrfs_free_reserved_data_space(inode, len);
}
/*