From 6a41dd0922e3c63e677c2d8f7906ce6a3e097af1 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Fri, 13 Mar 2015 15:12:23 -0400 Subject: [PATCH] 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: Josef Bacik Signed-off-by: Chris Mason --- fs/btrfs/extent-tree.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 92146a5afdc1..96c613bfe157 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -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)