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From: Greg KH <greg@kroah.com>
To: Hugh Dickins <hugh@veritas.com>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
Subject: Re: kernel BUG at mm/rmap.c:480 in 2.6.10-rc3-bk7
Date: Tue, 14 Dec 2004 16:19:12 -0800	[thread overview]
Message-ID: <20041215001912.GA15575@kroah.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0412142304160.11826-100000@localhost.localdomain>

On Tue, Dec 14, 2004 at 11:26:48PM +0000, Hugh Dickins wrote:
> One case that's easy to explain: if it was preceded (perhaps hours
> earlier) by a "Bad page state" message and stacktrace, referring to
> the same page (in ecx, edx, ebp in your dump), which showed non-zero
> mapcount, then this is an after-effect of bad_page resetting mapcount.
> And the real problem was probably a double free, which bad_page noted,
> but carried on regardless.  Worth checking your logs for, let us know,
> but there have been several reports where that's definitely not so.

Nope, nothing like that in my logs, sorry.

> I presume this was just a one-off?  If you can repeat it from time to
> time, I'll try to devise some printk'ing to shed more light.

I'll try to see if I can reproduce it.  If so, I'll let you know.

thanks,

greg k-h

  parent reply	other threads:[~2004-12-15  0:30 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-12-14 16:45 kernel BUG at mm/rmap.c:480 in 2.6.10-rc3-bk7 Greg KH
2004-12-14 23:26 ` Hugh Dickins
2004-12-15  0:10   ` Nick Piggin
2004-12-15  0:19   ` Greg KH [this message]
2004-12-15  1:11     ` Greg KH
2004-12-15 17:23       ` Hugh Dickins
2004-12-15 17:58         ` Greg KH
2004-12-15 18:48           ` Hugh Dickins
2004-12-15 22:22             ` Hugh Dickins
2004-12-15 22:33             ` Dave Airlie
2004-12-15 23:19               ` Greg KH
2004-12-15 19:03           ` Andrea Arcangeli
2004-12-15 22:48             ` Andrea Arcangeli
2004-12-15 23:41               ` Greg KH
2004-12-16  5:18                 ` Hugh Dickins
2004-12-16 14:28                   ` Andrea Arcangeli
2004-12-16 17:03                     ` Hugh Dickins
2004-12-15  0:43   ` Andrea Arcangeli

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