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Subject: Re: 2.5.34-mm4
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Rik van Riel <riel@conectiva.com.br>
Cc: Andrew Morton <akpm@digeo.com>, "M. Edward Borasky" <znmeb@aracnet.com>,
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On Sun, 2002-09-15 at 19:56, Rik van Riel wrote:
> On Sun, 15 Sep 2002, Andrew Morton wrote:
> 
> > - In -ac, there are noticeable stalls during heavy writeout.  This
> >   may be an ext3 thing, but I can't think of any IO scheduling
> >   differences in -ac ext3.  I'd be guessing that it is due to
> >   bdflush/kupdate lumpiness.

I think so. I've always been conservative, I need rmap to pass cerberus
still. But the rmap in -ac is out of date a little with the 2.5 tuning

> This is also due to the fact that -ac has an older -rmap
> VM. As in current 2.5, rmap can write out all inactive
> pages ... and it did in some worst case situations.
> 
> This is fixed in rmap14.
> 
> (I hope Alan is done playing with IDE soon so I can push
> him a VM update)

The big one left to fix is the simplex device bug - which is an "I know
why". The great mystery is the affair of taskfile pio write. Other than
that its annoying glitches not big problems now.

So send me rmap-14a patches by all means

-
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