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| author | Waiman Long <longman@redhat.com> | 2017-01-05 21:17:03 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-02-04 09:01:54 +0100 |
| commit | c4b73aabd0989d93b82894417ae501690bd1db5e (patch) | |
| tree | 1f652ea5b9e58b83e86f299e321bb6e6b5732113 /lib | |
| parent | Linux 4.10-rc6 (diff) | |
| download | linux-c4b73aabd0989d93b82894417ae501690bd1db5e.tar.xz linux-c4b73aabd0989d93b82894417ae501690bd1db5e.zip | |
debugobjects: Track number of kmem_cache_alloc/kmem_cache_free done
New debugfs stat counters are added to track the numbers of
kmem_cache_alloc() and kmem_cache_free() function calls to get a
sense of how the internal debug objects cache management is performing.
Signed-off-by: Waiman Long <longman@redhat.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: "Du Changbin" <changbin.du@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jan Stancek <jstancek@redhat.com>
Link: http://lkml.kernel.org/r/1483647425-4135-2-git-send-email-longman@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/debugobjects.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/debugobjects.c b/lib/debugobjects.c index 04c1ef717fe0..d78673e7dc56 100644 --- a/lib/debugobjects.c +++ b/lib/debugobjects.c @@ -55,6 +55,12 @@ static int debug_objects_enabled __read_mostly static struct debug_obj_descr *descr_test __read_mostly; +/* + * Track numbers of kmem_cache_alloc and kmem_cache_free done. + */ +static int debug_objects_alloc; +static int debug_objects_freed; + static void free_obj_work(struct work_struct *work); static DECLARE_WORK(debug_obj_work, free_obj_work); @@ -102,6 +108,7 @@ static void fill_pool(void) raw_spin_lock_irqsave(&pool_lock, flags); hlist_add_head(&new->node, &obj_pool); + debug_objects_alloc++; obj_pool_free++; raw_spin_unlock_irqrestore(&pool_lock, flags); } @@ -173,6 +180,7 @@ static void free_obj_work(struct work_struct *work) obj = hlist_entry(obj_pool.first, typeof(*obj), node); hlist_del(&obj->node); obj_pool_free--; + debug_objects_freed++; /* * We release pool_lock across kmem_cache_free() to * avoid contention on pool_lock. @@ -758,6 +766,8 @@ static int debug_stats_show(struct seq_file *m, void *v) seq_printf(m, "pool_min_free :%d\n", obj_pool_min_free); seq_printf(m, "pool_used :%d\n", obj_pool_used); seq_printf(m, "pool_max_used :%d\n", obj_pool_max_used); + seq_printf(m, "objects_alloc :%d\n", debug_objects_alloc); + seq_printf(m, "objects_freed :%d\n", debug_objects_freed); return 0; } |