Date: Sat, 04 Jan 2003 00:45:33 -0600 From: "Alan L. Cox" <alc@imimic.com> To: Arun Sharma <adsharma@unix-os.sc.intel.com> Cc: alc@freebsd.org, freebsd-ia64@freebsd.org Subject: Re: Assertion failure in vm_page.c:289 Message-ID: <3E16830D.F7D8507D@imimic.com> References: <20030103180935.A3170@unix-os.sc.intel.com> <20030103183441.A3425@unix-os.sc.intel.com>
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Arun Sharma wrote:
>
> Looking at i386 code, this seems to be the missing lock.
>
Yes, that looks plausible. I'll commit the change shortly.
Thanks,
Alan
>
> --- pmap.c- Sat Jan 4 00:14:49 2003
> +++ pmap.c Sat Jan 4 02:30:57 2003
> @@ -1694,7 +1694,9 @@
> */
> if (opa) {
> int error;
> + vm_page_lock_queues();
> error = pmap_remove_pte(pmap, pte, va, 0, 0);
> + vm_page_unlock_queues();
> if (error)
> panic("pmap_enter: pte vanished, va: 0x%lx", va);
> }
>
> On Fri, Jan 03, 2003 at 06:09:35PM -0800, Arun Sharma wrote:
> > Alan,
> >
> > It looks like you added this assertion on Dec 28th.
> >
> > void
> > vm_page_flag_clear(vm_page_t m, unsigned short bits)
> > {
> >
> > mtx_assert(&vm_page_queue_mtx, MA_OWNED); <-----
> > m->flags &= ~bits;
> > }
> >
> > and I'm seeing the assertion failure right at startup (after execing
> > /sbin/init) on a ia64 box. Is it possible that there was an accompanying
> > change that was made to i386, but not ia64 ?
> >
> > -Arun
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