Messages in this thread | | | Date | Thu, 2 May 2002 17:59:46 +0200 | From | Andrea Arcangeli <> | Subject | Re: Bug: Discontigmem virt_to_page() [Alpha,ARM,Mips64?] |
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On Wed, May 01, 2002 at 07:37:11PM -0700, William Lee Irwin III wrote: > On Thu, May 02, 2002 at 02:47:40AM +0200, Andrea Arcangeli wrote: > > Oh yeah, you save 1 microsecond every 10 years of uptime by taking > > advantage of the potentially coalesced cacheline between the last page > > in a node and the first page of the next node. Before you can care about > > this optimizations you should remove from x86 the pgdat loops that are > > not needed with discontigmem disabled like in x86 (this has nothing to > > do with discontigmem/nonlinear). That wouldn't be measurable too but at > > least it would be more worthwhile. > > Which ones did you have in mind? I did poke around this area a bit, and
all of them, if you implement a mechanism to skip one of the pgdat loops, you could skip them of all then.
> already have my eye on one... > > > Cheers, > Bill
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