From bbaef7973dd017954419718ab2df526ae1f66e93 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Mon, 24 Jul 2023 10:43:57 -0400 Subject: libfs: Add a lock class for the offset map's xa_lock Tie the dynamically-allocated xarray locks into a single class so contention on the directory offset xarrays can be observed. Signed-off-by: Chuck Lever Message-Id: <169020933088.160441.9405180953116076087.stgit@manet.1015granger.net> Signed-off-by: Christian Brauner --- fs/libfs.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'fs/libfs.c') diff --git a/fs/libfs.c b/fs/libfs.c index a7e56baf8bbd..3495f071093e 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -249,6 +249,8 @@ static u32 dentry2offset(struct dentry *dentry) return (u32)((uintptr_t)(dentry->d_fsdata)); } +static struct lock_class_key simple_offset_xa_lock; + /** * simple_offset_init - initialize an offset_ctx * @octx: directory offset map to be initialized @@ -257,6 +259,7 @@ static u32 dentry2offset(struct dentry *dentry) void simple_offset_init(struct offset_ctx *octx) { xa_init_flags(&octx->xa, XA_FLAGS_ALLOC1); + lockdep_set_class(&octx->xa.xa_lock, &simple_offset_xa_lock); /* 0 is '.', 1 is '..', so always start with offset 2 */ octx->next_offset = 2; -- cgit v1.2.3