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    SubjectRe: 2.6.9-mm1
    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
    -
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