Re: 2.6.9-mm1

["Randy.Dunlap" <rddunlap@osdl.org>]

Andrew Morton wrote:
> "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?

Sure.  Bart?

> How come your disks are running in PIO mode anyway?

No idea.


>>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