Add statistics counters for slab defragmentation.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
---
Documentation/vm/slabinfo.c | 45 ++++++++++++++++++++++++++++++++++++--------
include/linux/slub_def.h | 6 +++++
mm/slub.c | 29 ++++++++++++++++++++++++++--
3 files changed, 70 insertions(+), 10 deletions(-)
Index: linux-2.6/Documentation/vm/slabinfo.c
===================================================================
--- linux-2.6.orig/Documentation/vm/slabinfo.c 2008-05-07 21:23:04.902660104 -0700
+++ linux-2.6/Documentation/vm/slabinfo.c 2008-05-07 21:23:05.432658246 -0700
@@ -41,6 +41,9 @@ struct slabinfo {
unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
unsigned long deactivate_to_head, deactivate_to_tail;
unsigned long deactivate_remote_frees, order_fallback;
+ unsigned long shrink_calls, shrink_attempt_defrag, shrink_empty_slab;
+ unsigned long shrink_slab_skipped, shrink_slab_reclaimed;
+ unsigned long shrink_object_reclaim_failed;
int numa[MAX_NODES];
int numa_partial[MAX_NODES];
} slabinfo[MAX_SLABS];
@@ -79,6 +82,7 @@ int sort_active = 0;
int set_debug = 0;
int show_ops = 0;
int show_activity = 0;
+int show_defragcount = 0;
/* Debug options */
int sanity = 0;
@@ -113,6 +117,7 @@ void usage(void)
"-e|--empty Show empty slabs\n"
"-f|--first-alias Show first alias\n"
"-F|--defrag Show defragmentable caches\n"
+ "-G:--display-defrag Display defrag counters\n"
"-h|--help Show usage information\n"
"-i|--inverted Inverted list\n"
"-l|--slabs Show slabs\n"
@@ -300,6 +305,8 @@ void first_line(void)
{
if (show_activity)
printf("Name Objects Alloc Free %%Fast Fallb O\n");
+ else if (show_defragcount)
+ printf("Name Objects DefragRQ Slabs Success Empty Skipped Failed\n");
else
printf("...
