Re: 2.5.39 kmem_cache bug

[Manfred Spraul <manfred@colorfullife.com>]

Ed Tomlinson wrote:
>  
> -	if (__kmem_cache_shrink(cachep)) {
> +	/* remove any empty partial pages */
> +	spin_lock_irq(&cachep->spinlock);
> +	while (!cachep->growing) {
> +		struct list_head *p;
> +		slab_t *slabp;
> +

growing is guaranteed to be false - loop is not necessary.

Actually growing can be removed completely, it's never necessary, 
neither with nor without kmem_cache_reap().

Ed, there are far more cleanups possible in slab.c than just going from 
3 to 2 lists, but IMHO it's far to early to make the design decision for 
2 lists.

Or wait: You want 2 lists? Ok, agreed.

free and partial ;-)

The full list is unnecessary, it's possible to replace it with a 
counter. It also saves several cacheline accesses for the list_del() and 
list_add() into the full list...

--
	Manfred