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

[Tim Bird]

On 10/23/2012 1:31 PM, Christoph Lameter wrote:
> On Tue, 23 Oct 2012, Ezequiel Garcia wrote:
>
> > The issue is: with SLUB large kmallocs don't set NR_SLAB_UNRECLAIMABLE
> > zone item.
> > Thus, they don't show at /proc/meminfo. Is this okey?
> Yes. Other large allocations that are done directly via __get_free_pages()
> etc also do not show up there. Slab allocators are intended for small
> allocation and are not effective for large scale allocs. People will
> use multiple different ways of acquiring large memory areas. So there is
> no consistent accounting for that memory.
There's a certain irony here.  In embedded, we get all worked
up about efficiencies in the slab allocators, but don't have a good
way to track the larger memory allocations.  Am I missing
something, or is there really no way to track these large
scale allocations?
 -- Tim


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