Bad interaction between virtual memmap and rmap changes?

From: Ian Wienand <ianw_at_gelato.unsw.edu.au>
Date: 2004-09-01 15:59:33
Hi,

With 2.6.9-rc1 on IA64 I have this problem when I boot on an rx2600
(with both SMP and uniprocessor builds) :

Bad page state at free_hot_cold_page (in process 'swapper', page e0000000049bcd08)
flags:0x00000000 mapping:0000000000000000 mapcount:1 count:0
Backtrace:
[-- no backtrace is printed, unfortunately, and the machine stops dead --]

But I also noticed that virtual mem map was right at around the same
place :

Virtual mem_map starts at 0xe000000004928000

So I turned that off in the config, and it appears to work OK.  I
noticed there were a lot of rmap changes with respect to locking just
recently put in, and I suspect they are the culprit.  I'm afraid this
is a little over my head, but I'm willing to try any suggestions.

-i
ianw@gelato.unsw.edu.au
http://www.gelato.unsw.edu.au

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Received on Wed Sep 1 01:59:50 2004

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