ich777/linux_media
1
0
Fork 0
mirror of https://github.com/tbsdtv/linux_media.git synced 2025-07-23 20:51:03 +02:00
Code Issues Packages Projects Releases Wiki Activity

fscache: Add tracepoints

Browse Source 
Add some tracepoints to fscache:

 (*) fscache_cookie - Tracks a cookie's usage count.

 (*) fscache_netfs - Logs registration of a network filesystem, including
     the pointer to the cookie allocated.

 (*) fscache_acquire - Logs cookie acquisition.

 (*) fscache_relinquish - Logs cookie relinquishment.

 (*) fscache_enable - Logs enablement of a cookie.

 (*) fscache_disable - Logs disablement of a cookie.

 (*) fscache_osm - Tracks execution of states in the object state machine.

and cachefiles:

 (*) cachefiles_ref - Tracks a cachefiles object's usage count.

 (*) cachefiles_lookup - Logs result of lookup_one_len().

 (*) cachefiles_mkdir - Logs result of vfs_mkdir().

 (*) cachefiles_create - Logs result of vfs_create().

 (*) cachefiles_unlink - Logs calls to vfs_unlink().

 (*) cachefiles_rename - Logs calls to vfs_rename().

 (*) cachefiles_mark_active - Logs an object becoming active.

 (*) cachefiles_wait_active - Logs a wait for an old object to be
     destroyed.

 (*) cachefiles_mark_inactive - Logs an object becoming inactive.

 (*) cachefiles_mark_buried - Logs the burial of an object.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2018-04-04 13:41:27 +01:00
parent 2c98425720
commit a18feb5576
12 changed files with 731 additions and 54 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
fs/cachefiles/interface.c
View File

@@ -177,10 +177,12 @@ static void cachefiles_lookup_complete(struct fscache_object *_object)
* increment the usage count on an inode object (may fail if unmounting)
*/
static
struct fscache_object *cachefiles_grab_object(struct fscache_object *_object)
struct fscache_object *cachefiles_grab_object(struct fscache_object *_object,
enum fscache_obj_ref_trace why)
{
struct cachefiles_object *object =
container_of(_object, struct cachefiles_object, fscache);
int u;
_enter("{OBJ%x,%d}", _object->debug_id, atomic_read(&object->usage));
@@ -188,7 +190,9 @@ struct fscache_object *cachefiles_grab_object(struct fscache_object *_object)
ASSERT((atomic_read(&object->usage) & 0xffff0000) != 0x6b6b0000);
#endif
atomic_inc(&object->usage);
u = atomic_inc_return(&object->usage);
trace_cachefiles_ref(object, _object->cookie,
(enum cachefiles_obj_ref_trace)why, u);
return &object->fscache;
}
@@ -309,10 +313,12 @@ static void cachefiles_drop_object(struct fscache_object *_object)
/*
* dispose of a reference to an object
*/
static void cachefiles_put_object(struct fscache_object *_object)
static void cachefiles_put_object(struct fscache_object *_object,
enum fscache_obj_ref_trace why)
{
struct cachefiles_object *object;
struct fscache_cache *cache;
int u;
ASSERT(_object);
@@ -328,7 +334,11 @@ static void cachefiles_put_object(struct fscache_object *_object)
ASSERTIFCMP(object->fscache.parent,
object->fscache.parent->n_children, >, 0);
if (atomic_dec_and_test(&object->usage)) {
u = atomic_dec_return(&object->usage);
trace_cachefiles_ref(object, _object->cookie,
(enum cachefiles_obj_ref_trace)why, u);
ASSERTCMP(u, !=, -1);
if (u == 0) {
_debug("- kill object OBJ%x", object->fscache.debug_id);
ASSERT(!test_bit(CACHEFILES_OBJECT_ACTIVE, &object->flags));