Messages in this thread | | | Date | Fri, 23 Mar 2007 22:21:33 -0800 | From | Andrew Morton <> | Subject | Re: [QUICKLIST 1/5] Quicklists for page table pages V4 |
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On Fri, 23 Mar 2007 10:54:12 -0700 (PDT) Christoph Lameter <clameter@sgi.com> wrote:
> Here are the results of aim9 tests on x86_64. There are some minor performance > improvements and some fluctuations.
There are a lot of numbers there - what do they tell us?
> 2.6.21-rc4 bare > 2.6.21-rc4 x86_64 quicklist
So what has changed here? From a quick look it appears that x86_64 is using get_zeroed_page() for ptes, puds and pmds and is using a custom quicklist for pgds.
After your patches, x86_64 is using a common quicklist allocator for puds, pmds and pgds and continues to use get_zeroed_page() for ptes.
Or something totally different, dunno. I tire.
My question is pretty simple: how do we justify the retention of this custom allocator?
Because simply removing it is the preferable way of fixing the SLUB problem. - 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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