Re: [patch 12/23] SLUB: Trigger defragmentation from memory reclaim

[Christoph Lameter]

On Thu, 8 Nov 2007, Mel Gorman wrote:

> >  	up_read(&shrinker_rwsem);
> > +	if (gfp_mask & __GFP_FS)
> > +		kmem_cache_defrag(zone ? zone_to_nid(zone) : -1);
> 
> Does this make an assumption that only filesystem-related slabs may be
> targetted for reclaim? What if there is a slab that can free its objects
> without ever caring about a filesystem?

Correct. Currently only filesystem related slabs support slab defragy.
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