Dump information into the syslog during defragmentation actions to show that something is occurring and what effect it has. This is likely only useful in mm for testing and verification. Signed-off-by: Christoph Lameter --- mm/slub.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) Index: linux-2.6.22-rc6-mm1/mm/slub.c =================================================================== --- linux-2.6.22-rc6-mm1.orig/mm/slub.c 2007-07-06 20:04:54.000000000 -0700 +++ linux-2.6.22-rc6-mm1/mm/slub.c 2007-07-06 20:06:45.000000000 -0700 @@ -2599,6 +2599,8 @@ static unsigned long sort_partial_list(s return freed; } +#define NR_INUSE 40 + /* * Shrink the slab cache on a particular node of the cache */ @@ -2610,6 +2612,8 @@ static unsigned long __kmem_cache_shrink LIST_HEAD(zaplist); int freed; int inuse; + int nr[NR_INUSE] = { 0, }; + int i; spin_lock_irqsave(&n->list_lock, flags); freed = sort_partial_list(s, n, scratch); @@ -2646,6 +2650,8 @@ static unsigned long __kmem_cache_shrink n->nr_partial--; SetSlabFrozen(page); slab_unlock(page); + if (inuse < NR_INUSE) + nr[inuse]++; } spin_unlock_irqrestore(&n->list_lock, flags); @@ -2659,6 +2665,13 @@ static unsigned long __kmem_cache_shrink if (__kmem_cache_vacate(s, page, flags, scratch) == 0) freed++; } + printk(KERN_INFO "Slab %s: Defrag freed %d pages. PartSlab config=", + s->name, freed << s->order); + + for (i = 0; i < NR_INUSE; i++) + if (nr[i]) + printk(" %d=%d", i, nr[i]); + printk("\n"); return freed; } -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/