Re: [PATCH 1/2] mm/slob: Mark zone page state to get slab usage at/proc/meminfo

From: Christoph Lameter
Date: Tue Oct 23 2012 - 14:15:30 EST

On Mon, 22 Oct 2012, Ezequiel Garcia wrote:

> SLUB handles large kmalloc allocations falling back
> to page-size allocations (kmalloc_large, etc).
> This path doesn't touch NR_SLAB_XXRECLAIMABLE zone item state.

Right. UNRECLAIMABLE allocations do not factor in reclaim decisions.

> Without fully understanding it, I've decided to implement the same
> behavior for SLOB,
> leaving page-size allocations unaccounted on /proc/meminfo.
> Is this expected / wanted ?

Yes that is fine.

> SLAB, on the other side, handles every allocation through some slab cache,
> so it always set the zone state.

Right but the caching barely has any effect at large sizes.

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