Re: Bug: Discontigmem virt_to_page() [Alpha,ARM,Mips64?]

From: William Lee Irwin III (
Date: Wed May 01 2002 - 21:37:11 EST

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
already have my eye on one...

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