Messages in this thread | | | Date | Wed, 20 Apr 2011 13:25:41 -0600 | From | Matthew Wilcox <> | Subject | Re: [PATCH v3] mm: make expand_downwards symmetrical to expand_upwards |
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On Wed, Apr 20, 2011 at 10:22:04AM -0500, Christoph Lameter wrote: > There is barely any testing going on at all of this since we have had this > issue for more than 5 years and have not noticed it. The absence of bug > reports therefore proves nothing. Code inspection of the VM shows > that this is an issue that arises in multiple subsystems and that we have > VM_BUG_ONs in the page allocator that should trigger for these situations.
So ... we've proven that people using these architectures use SLAB instead of SLUB, don't enable CONFIG_DEBUG_VM and don't use hugepages (not really a surprise ... nobody's running Oracle on these arches :-)
I don't think that qualifies as "barely any testing". I think that's "nobody developing the Linux MM uses one of these architectures".
-- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step."
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