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authorJeff Layton <jlayton@redhat.com>2013-06-21 08:58:17 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2013-06-29 12:57:44 +0400
commit139ca04ee572fea6c0c105e88aba3a534efcd7c4 (patch)
treeb75d2c4b93099413b1910909ee8b884370590c71 /include/linux/fs.h
parent4e8c765d384e549f9b542ea0bd42e2aa227e1404 (diff)
downloadlinux-linaro-stable-139ca04ee572fea6c0c105e88aba3a534efcd7c4.tar.gz
locks: convert fl_link to a hlist_node
Testing has shown that iterating over the blocked_list for deadlock detection turns out to be a bottleneck. In order to alleviate that, begin the process of turning it into a hashtable. We start by turning the fl_link into a hlist_node and the global lists into hlists. A later patch will do the conversion of the blocked_list to a hashtable. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: J. Bruce Fields <bfields@fieldses.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/fs.h')
-rw-r--r--include/linux/fs.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 24fe998795e1..fab064a3b65f 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -946,7 +946,7 @@ int locks_in_grace(struct net *);
*/
struct file_lock {
struct file_lock *fl_next; /* singly linked list for this inode */
- struct list_head fl_link; /* doubly linked list of all locks */
+ struct hlist_node fl_link; /* node in global lists */
struct list_head fl_block; /* circular list of blocked processes */
fl_owner_t fl_owner;
unsigned int fl_flags;