Commit-ID: c4b73aabd0989d93b82894417ae501690bd1db5e Gitweb: http://git.kernel.org/tip/c4b73aabd0989d93b82894417ae501690bd1db5e Author: Waiman Long <long...@redhat.com> AuthorDate: Thu, 5 Jan 2017 15:17:03 -0500 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Sat, 4 Feb 2017 09:01:54 +0100
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 <long...@redhat.com> Cc: Christian Borntraeger <borntrae...@de.ibm.com> Cc: "Du Changbin" <changbin...@intel.com> Cc: Andrew Morton <a...@linux-foundation.org> Cc: Jan Stancek <jstan...@redhat.com> Link: http://lkml.kernel.org/r/1483647425-4135-2-git-send-email-long...@redhat.com Signed-off-by: Thomas Gleixner <t...@linutronix.de> --- lib/debugobjects.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/lib/debugobjects.c b/lib/debugobjects.c index 04c1ef7..d78673e 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; }
