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Date: Mon, 23 Jan 2006 16:29:04 -0600
From: Alan Cox <alc@cs.rice.edu>
To: Sam Leffler <sam@errno.com>
Message-ID: <20060123222904.GA5033@cs.rice.edu>
References: <200601230000.k0N00k0f091069@repoman.freebsd.org>
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Cc: Alan Cox <alc@FreeBSD.org>, cvs-src@FreeBSD.org, src-committers@FreeBSD.org,
	cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/kern vfs_bio.c
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On Mon, Jan 23, 2006 at 11:27:32AM -0800, Sam Leffler wrote:
> Alan Cox wrote:
> >alc         2006-01-23 00:00:46 UTC
> >
> >  FreeBSD src repository
> >
> >  Modified files:
> >    sys/kern             vfs_bio.c 
> >  Log:
> >  Remove an unnecessary call to pmap_remove_all().  The given page is not
> >  mapped because its contents are invalid.
> 
> This appears to be the cause of the vm_page_free_toq panics.
> 

Yes.  This change has revealed a case in which a page's contents are
invalidated but the page's mappings are not immediately revoked.  Tor
has proposed a fix that I will review this evening.

Regards,
Alan