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gfs2: Save ip from gfs2_glock_nq_init

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Before this patch, when a glock was locked by function gfs2_glock_nq_init,
it initialized the holder gh_ip (return address) as gfs2_glock_nq_init.
That made it extremely difficult to track down problems because many
functions call gfs2_glock_nq_init. This patch changes the function so
that it saves gh_ip from the caller of gfs2_glock_nq_init, which makes
it easy to backtrack which holder took the lock.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
This commit is contained in:
Andreas Gruenbacher 2021-09-30 13:49:36 -05:00
parent a500bd3155
commit b016d9a84a
2 changed files with 14 additions and 7 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

8
fs/gfs2/glock.c
View file

@ -911,7 +911,7 @@ static void gfs2_glock_poke(struct gfs2_glock *gl)
struct gfs2_holder gh;
int error;
gfs2_holder_init(gl, LM_ST_SHARED, flags, &gh);
__gfs2_holder_init(gl, LM_ST_SHARED, flags, &gh, _RET_IP_);
error = gfs2_glock_nq(&gh);
if (!error)
gfs2_glock_dq(&gh);
@ -1208,12 +1208,12 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
*
*/
void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state, u16 flags,
struct gfs2_holder *gh)
void __gfs2_holder_init(struct gfs2_glock *gl, unsigned int state, u16 flags,
struct gfs2_holder *gh, unsigned long ip)
{
INIT_LIST_HEAD(&gh->gh_list);
gh->gh_gl = gl;
gh->gh_ip = _RET_IP_;
gh->gh_ip = ip;
gh->gh_owner_pid = get_pid(task_pid(current));
gh->gh_state = state;
gh->gh_flags = flags;

13
fs/gfs2/glock.h
View file

@ -190,8 +190,15 @@ extern int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
extern void gfs2_glock_hold(struct gfs2_glock *gl);
extern void gfs2_glock_put(struct gfs2_glock *gl);
extern void gfs2_glock_queue_put(struct gfs2_glock *gl);
extern void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state,
u16 flags, struct gfs2_holder *gh);
extern void __gfs2_holder_init(struct gfs2_glock *gl, unsigned int state,
u16 flags, struct gfs2_holder *gh,
unsigned long ip);
static inline void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state,
u16 flags, struct gfs2_holder *gh) {
__gfs2_holder_init(gl, state, flags, gh, _RET_IP_);
}
extern void gfs2_holder_reinit(unsigned int state, u16 flags,
struct gfs2_holder *gh);
extern void gfs2_holder_uninit(struct gfs2_holder *gh);
@ -241,7 +248,7 @@ static inline int gfs2_glock_nq_init(struct gfs2_glock *gl,
{
int error;
gfs2_holder_init(gl, state, flags, gh);
__gfs2_holder_init(gl, state, flags, gh, _RET_IP_);
error = gfs2_glock_nq(gh);
if (error)