Date: Tue, 25 Sep 2001 09:56:07 +0200 From: Bernd Walter <ticso@mail.cicely.de> To: Bakul Shah <bakul@bitblocks.com> Cc: Matt Dillon <dillon@earth.backplane.com>, Ian Dowse <iedowse@maths.tcd.ie>, Julian Elischer <julian@elischer.org>, hackers@FreeBSD.ORG Subject: Re: VM Corruption - stumped, anyone have any ideas? Message-ID: <20010925095607.B27615@cicely20.cicely.de> In-Reply-To: <200109250114.VAA20993@glatton.cnchost.com>; from bakul@bitblocks.com on Mon, Sep 24, 2001 at 06:14:34PM -0700 References: <200109250027.f8P0RRk97980@earth.backplane.com> <200109250114.VAA20993@glatton.cnchost.com>
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On Mon, Sep 24, 2001 at 06:14:34PM -0700, Bakul Shah wrote: > FWIW, in a Unix port we did I remember putting the user > struct *above* the kernel stack. The stack grew down so you > hit the red zone (the guard pages) without clobbering the > user struct. Since struct user _ended_ on a page boundary, > its size was needed at locore.s assembly time but that was a > small price to pay for the added safety. I don't think a guard page can help here, because the page fault handler needs a working stack. -- B.Walter COSMO-Project http://www.cosmo-project.de ticso@cicely.de Usergroup info@cosmo-project.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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