pre-faulting would need to not prevent a minor fault, so that we could
track the application's progress through the file to determine that it is
still streaming. but if a minor fault still occurs, even if it's mostly a
nop, does that make anything more efficient?
> Chuck, if your read-ahead code is working could you send me the patch?
i have something i can send you now. it doesn't adjust the trigger point
automatically yet (it still uses a trigger point a half cluster before the
end of the read-ahead window), since i've been on vacation. i'll try to
post it later today.
i've been testing with grep and mpg123, so i know my implementation is
working. but i don't have anything real that gobbles data fast enough to
really compare with the old filemap_nopage.
- Chuck Lever
-- corporate: <chuckl@netscape.com> personal: <chucklever@netscape.net> or <cel@monkey.org>The Linux Scalability project: http://www.citi.umich.edu/projects/linux-scalability/
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