Date: Wed, 6 Aug 2003 16:22:43 -0400 From: Andrew Gallatin <gallatin@cs.duke.edu> To: Alan Cox <alc@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/i386/i386 pmap.c Message-ID: <20030806162243.A91712@grasshopper.cs.duke.edu> In-Reply-To: <200308061846.h76IkmYp068237@repoman.freebsd.org>; from alc@FreeBSD.org on Wed, Aug 06, 2003 at 11:46:48AM -0700 References: <200308061846.h76IkmYp068237@repoman.freebsd.org>
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Alan Cox [alc@FreeBSD.org] wrote:
> alc 2003/08/06 11:46:48 PDT
>
> FreeBSD src repository
>
> Modified files:
> sys/i386/i386 pmap.c
> Log:
> Acquire the page queues lock in pmap_insert_entry(). (I used to believe
> that the page's busy flag could be relied upon to synchronize access to the
> pv list. I don't any longer. See, for example, the call to
> pmap_insert_entry() from pmap_copy().)
Any chance this is what's causing the pmap corruption on alpha and ia64?
We're also doing those same 3 lines there:
TAILQ_INSERT_TAIL(&pmap->pm_pvlist, pv, pv_plist);
TAILQ_INSERT_TAIL(&m->md.pv_list, pv, pv_list);
m->md.pv_list_count++;
FWIW, I've managed to get a j16 buildworld to complete on a July 4
kernel, and fail with a fault-on-nofault-entry panic with a July 10
kernel.
Drew
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