Messages in this thread | | | Date | Mon, 6 Aug 2007 10:56:13 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: [PATCH 00/10] foundations for reserve-based allocation |
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On Mon, 6 Aug 2007, Peter Zijlstra wrote:
> We want a guarantee for N bytes from kmalloc(), this translates to a demand > on the slab allocator for 2*N+m (due to the power-of-two nature of kmalloc > slabs), where m is the meta-data needed by the allocator itself.
The guarantee occurs in what context? Looks like its global here but allocations may be restricted to a cpuset context? What happens in a GFP_THISNODE allocation? Or a memory policy restricted allocations?
> So we need functions translating our demanded kmalloc space into a page > reserve limit, and then need to provide a reserve of pages.
Only kmalloc? What about skb heads and such?
> And we need to ensure that once we hit the reserve, the slab allocator honours > the reserve's access. That is, a regular allocation may not get objects from > a slab allocated from the reserves.
From a cpuset we may hit the reserves since cpuset memory is out and then the rest of the system fails allocations? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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