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SubjectRe: VM in 2.4.7-pre hurts...
On Sun, 8 Jul 2001, Mike Galbraith wrote:

> is very oom with no disk activity. It _looks_ (xmm and vmstat) like
> it just ran out of cleanable dirty pages. With or without swap,

... Bingo. You hit the infamous __wait_on_buffer / ___wait_on_page
bug. I've seen this for quite a while now on our quad xeon test
machine, with some kernel versions it can be reproduced in minutes,
with others it won't trigger at all.

And after a recompile it's usually gone ...

I hope there is somebody out there who can RELIABLY trigger
this bug, so we have a chance of tracking it down.

> tar
> Trace; c012f2da <__wait_on_buffer+6a/8c>
> Trace; c01303c9 <bread+45/64>
> Trace; c01500ea <ext2_read_inode+fe/3c8>
> Trace; c01411f5 <get_new_inode+d1/15c>
> Trace; c0141416 <iget4+c2/d4>
> Trace; c0150b03 <ext2_lookup+43/68>
> Trace; c0138401 <path_walk+529/748>
> Trace; c0137aed <getname+5d/9c>
> Trace; c01389d8 <__user_walk+3c/58>
> Trace; c0135cc6 <sys_lstat64+16/70>
> Trace; c0106ae3 <system_call+33/38>

Virtual memory is like a game you can't win;
However, without VM there's truly nothing to lose...

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