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Subjectaa-170-drain_cpu_caches


A performance tweak (I guess): perform the cross-CPU cache reclaim
operation outside the global semaphore. Needs more explanation.


=====================================
--- 2.4.19-pre3/mm/slab.c~aa-170-drain_cpu_caches Tue Mar 19 19:49:03 2002
+++ 2.4.19-pre3-akpm/mm/slab.c Tue Mar 19 19:49:03 2002
@@ -916,8 +916,6 @@ static int __kmem_cache_shrink(kmem_cach
slab_t *slabp;
int ret;

- drain_cpu_caches(cachep);
-
spin_lock_irq(&cachep->spinlock);

/* If the cache is growing, stop shrinking. */
@@ -987,6 +985,8 @@ int kmem_cache_destroy (kmem_cache_t * c
kmem_cache_t, next);
list_del(&cachep->next);
up(&cache_chain_sem);
+
+ drain_cpu_caches(cachep);

if (__kmem_cache_shrink(cachep)) {
printk(KERN_ERR "kmem_cache_destroy: Can't free all objects %p\n",

-
-
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