Re: mm/rmap.c negative page map count BUG.

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On Tue, Jan 03, 2006 at 10:42:07PM +1100, Nick Piggin wrote:
 
 > Well it isn't PG_reserved, so it is unlikely to be something like ZERO_PAGE.
 > That kswapd eventually frees it indicates it is a regular pagecache page on
 > the LRU... so it is unusual that nobody has reported it here.
 > 
 > Can you reproduce it?

I can't :(

 > On a kernel.org kernel?

Only some of our users hit it, which makes it tricky to reproduce.

 > Can you print ->flags, ->count, ->mapping, etc instead of going BUG?

I can add some instrumentation like this though, and see what turns up.

thanks,

		Dave
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