Re: Swap

[David S. Miller]

   From: Rik van Riel <[e-mail]>
   Date: Tue, 20 Nov 2001 22:19:26 -0200 (BRST)

   On Tue, 20 Nov 2001, David S. Miller wrote:
   > The Apache folks were keeping it mapped across requests,
   > so even if it was "primed" (ie. pre-faulted), a read() into
   > a static buffer was still significantly faster.
   
   Interesting.  I wonder how read() and mmap() compare when the
   data is in highmem pages and we're facing a kmap()/kunmap()
   for read() ...

Probably, the performance drops for read() to be equivalent,
or slightly below, mmap() peformance.  That would be my guess.

Franks a lot,
David S. Miller
[e-mail]