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From: Hugh Dickins <>
Cc: Andrew Morton <>,
	Ingo Molnar <>, Thomas Gleixner <>,
	Andi Kleen <>,
Subject: Re: [PATCH mm] stop c_p_a corrupting the pds
Date: Wed, 6 Feb 2008 04:49:49 +0000 (GMT)	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Tue, 5 Feb 2008, wrote:
> On Tue, 05 Feb 2008 22:27:21 GMT, Hugh Dickins said:
> > When change_page_attr splits a large page on x86_32 (without PAE), it is
> > currently corrupting every process's page directory: fix that by removing
> > the thinko which passes down a physical instead of a virtual address -
> > this version of the patch being the hotfix for 2.6.24-mm1.
> > 
> > Signed-off-by: Hugh Dickins <>
> <snark>
> I *knew* there was a reason we should have had this patch series in -mm for a while.
> </snark>
> :)

Seriously, I do agree with you on that.  It seems like the excitement
of making great changes has overtaken proper caution here.

Though I guess it was just coincidence that made it more debuggable
in my -mm kernel (which gave "bad pgd" errors after starting X), when
the -git kernel just crashed somehow in starting X.  And I was lucky
to have CONFIG_VMSPLIT_2G_OPT on that machine, which placed the
corruption somewhere that soon got noticed.


  reply	other threads:[~2008-02-06  4:50 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-05 22:26 [PATCH] " Hugh Dickins
2008-02-05 22:27 ` [PATCH mm] " Hugh Dickins
2008-02-06  2:05   ` Valdis.Kletnieks
2008-02-06  4:49     ` Hugh Dickins [this message]
2008-02-06  8:26 ` [PATCH] " Ingo Molnar

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