Commit bbaef797 authored by Chuck Lever's avatar Chuck Lever Committed by Christian Brauner
Browse files

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: default avatarChuck Lever <chuck.lever@oracle.com>
Message-Id: <169020933088.160441.9405180953116076087.stgit@manet.1015granger.net>
Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
parent a2e45955

fs/libfs.c

+3 −0
Original line number Diff line number Diff line
@@ -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;