From bf00bd3458041c4643a13d80fb349d29cb66eb63 Mon Sep 17 00:00:00 2001 From: David Rientjes Date: Mon, 12 Dec 2016 16:41:44 -0800 Subject: mm, slab: maintain total slab count instead of active count Rather than tracking the number of active slabs for each node, track the total number of slabs. This is a minor improvement that avoids active slab tracking when a slab goes from free to partial or partial to free. For slab debugging, this also removes an explicit free count since it can easily be inferred by the difference in number of total objects and number of active objects. Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1612042020110.115755@chino.kir.corp.google.com Signed-off-by: David Rientjes Suggested-by: Joonsoo Kim Cc: Greg Thelen Cc: Aruna Ramakrishna Cc: Christoph Lameter Cc: Pekka Enberg Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/slab.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'mm/slab.h') diff --git a/mm/slab.h b/mm/slab.h index 26123c512fee..de6579dc362c 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -447,8 +447,8 @@ struct kmem_cache_node { struct list_head slabs_partial; /* partial list first, better asm code */ struct list_head slabs_full; struct list_head slabs_free; - unsigned long active_slabs; /* length of slabs_partial+slabs_full */ - unsigned long free_slabs; /* length of slabs_free */ + unsigned long total_slabs; /* length of all slab lists */ + unsigned long free_slabs; /* length of free slab list only */ unsigned long free_objects; unsigned int free_limit; unsigned int colour_next; /* Per-node cache coloring */ -- cgit v1.2.3-55-g7522