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Date: Mon, 25 Oct 2004 16:47:43 -0700
From: Andrew Morton <akpm@osdl.org>
To: "Randy.Dunlap" <rddunlap@osdl.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.9-mm1
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"Randy.Dunlap" <rddunlap@osdl.org> wrote:
>
> Andrew Morton wrote:
> > "Randy.Dunlap" <rddunlap@osdl.org> wrote:
> > 
> >>I'm trying to spend time on kexec++ this week, but this little BUG
> >>keeps getting in the way.  Has it already been reported/fixed?
> >>
> >>kernel BUG at arch/i386/mm/highmem.c:42!
> > 
> > 
> > oops, we did it again.
> > 
> > --- 25/drivers/ide/ide-taskfile.c~ide_pio_sector-kmap-fix	Mon Oct 25 15:54:35 2004
> > +++ 25-akpm/drivers/ide/ide-taskfile.c	Mon Oct 25 15:54:48 2004
> > @@ -304,7 +304,7 @@ static void ide_pio_sector(ide_drive_t *
> >  	else
> >  		taskfile_input_data(drive, buf, SECTOR_WORDS);
> >  
> > -	kunmap_atomic(page, KM_BIO_SRC_IRQ);
> > +	kunmap_atomic(buf, KM_BIO_SRC_IRQ);
> >  #ifdef CONFIG_HIGHMEM
> >  	local_irq_restore(flags);
> >  #endif
> > _
> 
> Yes, that gets further.   :(
> Maybe I'll just (try) apply the kexec patch to a vanilla kernel.

I doubt if it'll help much.  It looks like IDE PIO got badly broken. 
That's something we have to fix - could you work with Bart on it please?

How come your disks are running in PIO mode anyway?

> 
> Unable to handle kernel paging request at virtual address fffea000
>   printing eip:
> c02c8e4d
> *pde = 0064b067
> *pte = 00000000
> Oops: 0002 [#1]
> SMP DEBUG_PAGEALLOC
> Modules linked in:
> CPU:    0
> EIP:    0060:[<c02c8e4d>]    Not tainted VLI
> EFLAGS: 00010006   (2.6.9-mm1)
> EIP is at ide_insw+0xd/0x20
> eax: 000001f0   ebx: c05ee7ec   ecx: 00000100   edx: 000001f0
> esi: c05ee7ec   edi: fffea000   ebp: c056fe80   esp: c056fe7c
> ds: 007b   es: 007b   ss: 0068
> Process swapper (pid: 0, threadinfo=c056e000 task=c0486b80)
> Stack: c05ee740 c056fea0 c02c93b8 000001f0 fffea000 00000100 c05ee7ec 
> 00000080
>         fffea000 c056fec0 c02ccf06 c05ee7ec fffea000 00000080 00000000 
> 00000000
>         c05ee740 c056feec c02cd62b c05ee7ec fffea000 00000080 00000000 
> fffea000
> Call Trace:
>   [<c0107eff>] show_stack+0xaf/0xc0
>   [<c010808d>] show_registers+0x15d/0x1e0
>   [<c01082a6>] die+0x106/0x190
>   [<c011c707>] do_page_fault+0x517/0x6a6
>   [<c0107b4d>] error_code+0x2d/0x38
>   [<c02c93b8>] ata_input_data+0x98/0xa0
>   [<c02ccf06>] taskfile_input_data+0x26/0x50
>   [<c02cd62b>] ide_pio_sector+0xcb/0xf0
>   [<c02cd892>] task_in_intr+0xe2/0x100
>   [<c02c8c16>] ide_intr+0xb6/0x150
>   [<c0142cd8>] handle_IRQ_event+0x38/0x70
>   [<c0142df2>] __do_IRQ+0xe2/0x150
>   [<c0109606>] do_IRQ+0x36/0x60
>   [<c0107a30>] common_interrupt+0x18/0x20
>   [<c01050f1>] cpu_idle+0x31/0x50
>   [<c05709bf>] start_kernel+0x15f/0x180
>   [<c0100211>] 0xc0100211
> Code: e5 8b 55 08 ec 0f b6 c0 5d c3 8d 74 26 00 55 89 e5 8b 55 08 66 
> ed 0f b7 c
>   <0>Kernel panic - not syncing: Fatal exception in interrupt
>   <0>Dumping messages in 0 seconds : last chance for Alt-SysRq...
> 
> 
> 
> 
> -- 
> ~Randy
> MOTD:  Always include version info.
> (Again.  Sometimes I think ln -s /usr/src/linux/.config .signature)
-
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