Messages in this thread | | | Date | Wed, 28 Mar 2007 14:05:54 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: [RFC] i386: Remove page sized slabs for pgds and pmds |
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On Wed, 28 Mar 2007, Andrew Morton wrote:
> I would like to test qlhack on ia64, because ia64 puts pte-pages into the > quicklists as well, but my ia64 machine is presently indisposed.
Its probably easier to set the number of cached pages to one.
> My (much) preferred way to handle all this is to remove the quicklists from > all architectures: just use alloc_page() and free_page() for pte pages, pmd > pages, etc. I remain unaware of any testing whcih indicates that this > would be a bad change.
Tried this also on x86_64 with an enhanced quicklist patch that also deals with ptes (at the price of not guaranteeing the free after the tlb flush):
quicklist:
real 8m56.787s user 7m46.380s sys 0m55.910s
real 8m58.326s user 7m46.030s sys 0m56.250s
real 8m56.900s user 7m46.620s sys 0m55.570s
no quicklist:
real 9m7.798s user 7m48.340s sys 0m58.360s
real 8m58.994s user 7m47.980s sys 0m54.870s
real 8m58.533s user 7m48.030s sys 0m54.150s
Seems that there is a slight benefit but its also barely above noise level.
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