Re: [PATCH] Rmap speedup

From: Rik van Riel (riel@conectiva.com.br)
Date: Fri Aug 02 2002 - 19:56:57 EST

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On Fri, 2 Aug 2002, Andrew Morton wrote:

> > > Well that's fairly straightforward, thanks. Butt-ugly though ;)

> I changed it to, essentially:

> See http://www.zip.com.au/~akpm/linux/patches/2.5/2.5.30/daniel-rmap-speedup.patch

This patch looks good. Good enough for long-term maintainability,
even... ;)

I like it.

> We have short-term rmap problems:
>
> 1) Unexplained pte chain state with ntpd

I'll do a detailed trace of xntpd to see what's happening...

> 2) 10-20% increased CPU load in fork/exec/exit loads
> 3) system lock under heavy mmap load
> 4) ZONE_NORMAL pte_chain consumption
>
> Daniel and I are on 2), Bill is on 4) (I think).

regards,

Rik

-- Bravely reimplemented by the knights who say "NIH".

http://www.surriel.com/ http://distro.conectiva.com/

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