Re: [PATCH -mm 5/8] slab: remove kmem_cache_shrink retval

From: Christoph Lameter
Date: Mon Jun 02 2014 - 11:16:15 EST

On Sat, 31 May 2014, Vladimir Davydov wrote:

> > Well slub returns an error code if it fails
> ... to sort slabs by the nubmer of objects in use, which is not even
> implied by the function declaration. Why can *shrinking*, which is what
> kmem_cache_shrink must do at first place, ever fail?

Because there is a memory allocation failure. Or there may be other
processes going on that prevent shrinking. F.e. We may want to merge a
patchset that does defragmentation of slabs at some point.

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