Messages in this thread |  | | Subject | Re: [PATCH] ttm: add pool wc/uc page allocator | From | Michel Dänzer <> | Date | Fri, 17 Jul 2009 10:01:51 +0200 |
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On Thu, 2009-07-16 at 18:34 +0200, Jerome Glisse wrote: > On Thu, 2009-07-16 at 18:13 +0200, Jerome Glisse wrote: > > On AGP system we might allocate/free routinely uncached or wc memory, > > changing page from cached (wb) to uc or wc is very expensive and involves > > a lot of flushing. To improve performance this allocator use a pool > > of uc,wc pages. > > > > Currently each pool (wc, uc) is 256 pages big, improvement would be > > to tweak this according to memory pressure so we can give back memory > > to system. > > > > Signed-off-by: Dave Airlie <airlied@redhat.com> > > Signed-off-by: Jerome Glisse <jglisse@redhat.com> > > Just a follow-up on that one, i haven't been able yet to thoroughly > test this patch on AGP system, so i am mostly sending so other people > can test. I think i corrected few bugs that were in previous iteration > of that patch. > > Beside that i think i have addressed all comment previously raisen, > but don't hesitate to pin point any things i have miss.
This one works a little better on my PowerBook than the previous one:
PCI GART works (failed to allocate the ring buffer before) AGP fails to allocate the ring buffer (paniced at KMS init before)
-- Earthling Michel Dänzer | http://www.vmware.com Libre software enthusiast | Debian, X and DRI developer -- 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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