Re: [RFC/PATCH 2/3] SLUB: make ksize() more strict for page allocatorpass-through

From: Christoph Lameter
Date: Wed May 21 2008 - 14:52:39 EST

On Wed, 21 May 2008, Pekka J Enberg wrote:

> This patch changes ksize() to be more strict with objets passed to it. We now
> set PageSlab also for objects allocated with page allocator and use page->slab
> to check whether page is a regular slab page or a pass-through page.
> Also moves kmalloc_large() out-of-line as it's too big for inlining now.

Why is it too big? Without your additions it is converting kmallocs
inline to get_free_pages(). That results in a simple function call with
two constant parameters.

The patch touches the page struct uselessly. I think the PageSlab marking
is useful for debugging but not for a production kernel.
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