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Date: Mon, 30 Oct 2006 19:13:40 -0800
From: Andrew Morton <akpm@osdl.org>
To: andrew.j.wade@gmail.com
Cc: linux-kernel@vger.kernel.org, Andi Kleen <ak@suse.de>,
       Greg KH <greg@kroah.com>, Kay Sievers <kay.sievers@vrfy.org>
Subject: Re: [2.6.19-rc3-mm1] BUG at arch/i386/mm/pageattr.c:165
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On Mon, 30 Oct 2006 22:03:36 -0500
Andrew James Wade <andrew.j.wade@gmail.com> wrote:

> On Monday 30 October 2006 21:04, Andrew Morton wrote:
> > On Mon, 30 Oct 2006 20:26:24 -0500
> > Andrew James Wade <andrew.j.wade@gmail.com> wrote:
> > 
> > > I got the BUG below while booting. -rc2-mm2 worked fine, but with a
> > > different .config. I'm going to try and narrow this down further.
> > > 
> > > cheers,
> > > Andrew Wade
> > > 
> > > agpgart: Detected VIA KT266/KY266x/KT333 chipset
> > > agpgart: unable to get minor: 175
> > > agpgart: agp_frontend_initialize() failed.
> > > ------------[ cut here ]------------
> > > kernel BUG at arch/i386/mm/pageattr.c:165!
> > > invalid opcode: 0000 [#1]
> > > last sysfs file: 
> > > CPU:    0
> > > EIP:    0060:[<c010fdd7>]    Not tainted VLI
> > > EFLAGS: 00010082   (2.6.19-rc3-mm1 #1)
> > > EIP is at change_page_attr+0x167/0x234
> > > eax: 1fc001e3   ebx: c1009c80   ecx: dfc20000   edx: c04e4dfc
> > > esi: 1fc20000   edi: e0820000   ebp: 00000005   esp: dffc5e7c
> > > ds: 007b   es: 007b   ss: 0068
> > > Process swapper (pid: 1, ti=dffc4000 task=dffc3530 task.ti=dffc4000)
> > > Stack: 00000011 c13f8400 00000010 00000292 c04e4dfc dfc20000 00000163 00000163 
> > >        c13f8200 dfe66984 e0820000 00000005 c010fab8 c03ee740 c03ee740 dfe2334c 
> > >        00000004 e080f000 c0289195 dfe2334c dfe2334c e080f000 c02881f6 fffffffb 
> > > Call Trace:
> > >  [<c010fab8>] iounmap+0xaa/0xdc
> > >  [<00000004>] 0x4
> > >  =======================
> > > Code: 84 b7 00 00 00 eb d2 ff 43 0c eb 23 84 c0 78 1b 0b 74 24 1c 8b 54 24 10 89 32 8b 43 0c 85 c0 75 04 0f 0b eb fe 48 89 43 0c eb 04 <0f> 0b eb fe 8b 03 f6 c4 04 75 6c f6 05 0c 7c 45 c0 08 74 63 83 
> > > EIP: [<c010fdd7>] change_page_attr+0x167/0x234 SS:ESP 0068:dffc5e7c
> > >  <0>Kernel panic - not syncing: Attempted to kill init!
> > 
> > I'd be suspecting x86_64-mm-i386-clflush-size.patch and
> > x86_64-mm-i386-cpa-clflush.patch.  Because x86_64-mm-cpa-clflush.patch made
> > my x86_64 box instacrash in a similar manner, so I reverted that.
> > 
> > below is a ptch which reverts x86_64-mm-i386-clflush-size.patch and
> > x86_64-mm-i386-cpa-clflush.patch.  Can you test it please?
> 
> Same crash I'm afraid.

hm.  Please send the .config

> However, I was too aggressive in trimming the kernel log: there are
> some earlier errors:
> Unable to create device for VGA+; errno = -17
> ...
> Unable to create device for frame buffer device; errno = -17
> 
> Hope this helps.

argh.  Greg, I'm not sure that work is ready for prime-time.
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