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SubjectRe: 2.5.64-mm6
On Thu, 2003-03-13 at 12:34, Andrew Morton wrote:
> Jeremy Fitzhardinge <> wrote:
> >
> > On Thu, 2003-03-13 at 03:26, Andrew Morton wrote:
> > > This means that when an executable is first mapped in, the kernel will
> > > slurp the whole thing off disk in one hit. Some IO changes were made to
> > > speed this up.
> >
> > Does this just pull in text and data, or will it pull any debug sections
> > too? That could fill memory with a lot of useless junk.
> >
> Just text, I expect. Unless glibc is mapping debug info with PROT_EXEC ;)
> It's just a fun hack. Should be done in glibc.

Well, fun hack or glibc to-do list candidate, I hope it doesn't get
forgotten. I am happy to confirm that it did speed up the initial
launch time of Open Office from 20 seconds (2.5-bk) to 11 seconds (-mm6)
and Mozilla from 10 seconds (2.5-bk) to 6 seconds (-mm6).

I did run 2.5.64-mm6 with mem=64M under stress for several hours and it
took a beating and kept on ticking, although quite slowly.


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