Re: 2.6.9-mm1
From: Randy.Dunlap
Date: Tue Oct 26 2004 - 15:18:04 EST
Bartlomiej Zolnierkiewicz wrote:
On Tue, 26 Oct 2004 08:48:17 -0700, Randy.Dunlap <rddunlap@xxxxxxxx> wrote:
Yes, that gets further. :(
Maybe I'll just (try) apply the kexec patch to a vanilla kernel.
IDE PIO changes are the part of a vanilla kernel.
If vanilla kernel (+akpm's fix) works OK then
this bug is not mine fault. :)
I doubt if it'll help much. It looks like IDE PIO got badly broken.
Weird, this code was in -mm for over a month.
That's something we have to fix - could you work with Bart on it
please?
Sure. Bart?
I need more data, IDE PIO works fine here.
How come your disks are running in PIO mode anyway?
Maybe disks are runing in DMA mode but some application
triggers PIO access (IDENTIFY command, S.M.A.R.T. etc.)...
No idea.
Andrew made me look. Duh. It's because I'm booting with
ide=nodma.
So Bart, can you check the noautodma=1 code path?
And I'll test it again on Tuesday without using ide=nodma.
Booting 2.6.9-mm1 without using "ide=nodma" works well for me.
No other kernel changes.
I audited the code and only found the unrelated bug in
/proc/ide/hd?/smart_thresholds, fix below...
--- ide-disk.c.orig 2004-10-26 15:50:51.000000000 +0200
+++ ide-disk.c 2004-10-26 18:34:50.736448416 +0200
@@ -977,6 +977,7 @@
args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS;
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART;
args.command_type = IDE_DRIVE_TASK_IN;
+ args.data_phase = TASKFILE_IN;
args.handler = &task_in_intr;
(void) smart_enable(drive);
return ide_raw_taskfile(drive, &args, buf);
I tried reproducing the OOPS but I couldn't. Little bird tells me that
this bug is SMP and/or highmem specific (I don't have such hardware).
Randy, could you "ide=nodma" with 2.6.10-rc1 (+akpm's fix) and 2.6.9?
Sure, did that. 2.6.9 works fine, 2.6.10-rc1 dies as with 2.6.9-mm1.
Next?
Unable to handle kernel paging request at virtual address fffea000
printing eip:
c029f206
*pde = 00610067
*pte = 00000000
Oops: 0002 [#1]
SMP DEBUG_PAGEALLOC
Modules linked in:
CPU: 0
EIP: 0060:[<c029f206>] Not tainted VLI
EFLAGS: 00010006 (2.6.10-rc1)
EIP is at ide_insw+0xd/0x13
eax: 000001f0 ebx: c05b322c ecx: 00000100 edx: 000001f0
esi: c05b322c edi: fffea000 ebp: c0539e78 esp: c0539e74
ds: 007b es: 007b ss: 0068
Process swapper (pid: 0, threadinfo=c0538000 task=c0452b80)
Stack: c05b3180 c0539e98 c029f6bb 000001f0 fffea000 00000100 c05b322c
00000080
fffea000 c0539eb8 c02a302d c05b322c fffea000 00000080 00000000
00000000
c05b3180 c0539ee4 c02a3714 c05b322c fffea000 00000080 00000000
fffea000
Call Tra [<c0107dd3>] show_stack+0xaf/0xb7
[<c0107f58>] show_registers+0x15d/0x1d2
[<c0108160>] die+0x106/0x18e
[<c011a089>] do_page_fault+0x4da/0x669
[<c0107a31>] error_code+0x2d/0x38
[<c029f6bb>] ata_input_data+0x98/0xa0
[<c02a302d>] taskfile_input_data+0x26/0x49
[<c02a3714>] ide_pio_sector+0xcb/0xe5
[<c02a3960>] task_in_intr+0xe2/0xfe
[<c029efe8>] ide_intr+0xb6/0x14f
[<c013da07>] handle_IRQ_event+0x38/0x69
[<c013db1a>] __do_IRQ+0xe2/0x158
[<c01093fa>] do_IRQ+0x36/0x60
[<c0107914>] common_interrupt+0x18/0x20
[<c01050c3>] cpu_idle+0x31/0x40
[<c053a8cf>] start_kernel+0x179/0x195
[<c0100211>] 0xc0100211
Code: 90 90 90 90 90 55 89 e5 8b 55 08 ec 0f b6 c0 5d c3 55 89 e5 8b
55 08 66 e
<0>Kernel panic - not syncing: Fatal exception in interruptce:
--
~Randy
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