On Wed, 7 Nov 2001, Andrew Morton wrote:
> Mike Fedyk wrote:
> >
> > >
> >
> > I am running unpatched 2.4.14 now.
> >
> > Do you still want me to try this patch now that you know I have been able to
> > see the problem with 2.2.14+ext3?
> >
>
> It's OK - I can reproduce it easily anyway.
>
> There are two things here. Recent -ac kernels had a merge
> bug down in the /proc code which caused `Cached:' to go
> negative. It was recently fixed.
>
> And quite independently, current ext3 for Linus kernels now has a
> bug which causes the `buffermem_pages' number to get too large.
> This has the exact same effect: `Cached:' goes negative.
I can confirm this, with the ext3 0.9.14p8 and 0.9.15 patches for 2.4.14 our
buffer and cache values become very off the wall. Without ext3 the system
is fine (we are currently running 2.4.14 without ext3).
>
> The buffermem_pages counter is purely for reporting - no VM decisions are
> based on its value. But if it worries you, just remove line 1933 of
> fs/jbd/transaction.c.
This is good to hear.
Regards
Jim
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