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From: Dave Jones <davej@redhat.com>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: mm/rmap.c negative page map count BUG.
Date: Tue, 3 Jan 2006 08:53:12 -0500	[thread overview]
Message-ID: <20060103135312.GB18060@redhat.com> (raw)
In-Reply-To: <43BA630F.1020805@yahoo.com.au>

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

  reply	other threads:[~2006-01-03 13:53 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-01-03  8:26 mm/rmap.c negative page map count BUG Dave Jones
2006-01-03 11:42 ` Nick Piggin
2006-01-03 13:53   ` Dave Jones [this message]
2006-01-04 23:53     ` Andrew Morton
2006-01-04 23:56       ` Dave Jones
2006-01-05  0:16         ` Andrew Morton
2006-01-05  0:31           ` Dave Jones
2006-01-05  7:47       ` Dave Jones
2006-01-05  8:11         ` Arjan van de Ven
2006-01-05 11:15           ` Dave Jones
2006-01-05 11:18             ` Arjan van de Ven
2006-01-05 11:26               ` Dave Jones
2006-01-05 19:00             ` Octavio Alvarez
2006-01-11  8:01               ` Octavio Alvarez Piza
2006-01-11 16:12                 ` Hugh Dickins
2006-01-11 16:21                   ` Arjan van de Ven
2006-01-11 16:58                   ` Octavio Alvarez Piza
2006-01-11 17:18                     ` Hugh Dickins
2006-01-11 17:24                     ` Andrew Morton

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