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authorJosef Bacik <josef@redhat.com>2012-01-13 21:09:22 +0400
committerChris Mason <chris.mason@oracle.com>2012-01-17 00:29:43 +0400
commitf248679e86fead40cc78e724c7181d6bec1a2046 (patch)
tree88abeee0b2a87c0f0377509525c92d3c9ec15a15 /fs/btrfs/btrfs_inode.h
parent8c2a3ca20f6233677ac3222c6506174010eb414f (diff)
downloadlinux-f248679e86fead40cc78e724c7181d6bec1a2046.tar.xz
Btrfs: add a delalloc mutex to inodes for delalloc reservations
I was using i_mutex for this, but we're getting bogus lockdep warnings by doing that and theres no real way to get rid of those, so just stop using i_mutex to protect delalloc metadata reservations and use a delalloc mutex instead. This shouldn't be contended often at all, only if you are writing and mmap writing to the file at the same time. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com>
Diffstat (limited to 'fs/btrfs/btrfs_inode.h')
-rw-r--r--fs/btrfs/btrfs_inode.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index 634608d2a6d0..9b9b15fd5204 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -51,6 +51,9 @@ struct btrfs_inode {
/* held while logging the inode in tree-log.c */
struct mutex log_mutex;
+ /* held while doing delalloc reservations */
+ struct mutex delalloc_mutex;
+
/* used to order data wrt metadata */
struct btrfs_ordered_inode_tree ordered_tree;