Messages in this thread | | | Date | Tue, 20 Mar 2001 19:59:37 +0100 | From | Jakob Østergaard <> | Subject | Re: Linux 2.4.2 fails to merge mmap areas, 700% slowdown. |
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On Tue, Mar 20, 2001 at 10:43:33AM -0800, Linus Torvalds wrote: > > > On Tue, 20 Mar 2001, Serge Orlov wrote: > > > > I upgraded one of our computer happily running 2.2.13 kernel > > to 2.4.2. Everything was OK, but compilation time of our C++ > > project greatly increased (1.4 times slower). I investigated the > > issue and found that g++ spends 7 times more time in kernel. > > The reason for this is big vm map: > > Cool. Somebody actually found a real case. > > I'll fix the mmap case asap. Its' not hard, I just waited to see if it > ever actually triggers. Something like g++ certainly counts as major.
Uber-cool ! :)
> > Are you willing to test out patches?
Definitely.
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