linux-kernel - Re: Boot problems on Malta with EVA (bisected to 12220dea07f1 "mm/slab: support slab merge")

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Date:	Tue, 28 Oct 2014 22:01:15 +0900
From:	Joonsoo Kim <js1304@...il.com>
To:	Markos Chandras <Markos.Chandras@...tec.com>
Cc:	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Christoph Lameter <cl@...ux.com>,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, linux-mips@...ux-mips.org
Subject: Re: Boot problems on Malta with EVA (bisected to 12220dea07f1
 "mm/slab: support slab merge")

2014-10-28 19:45 GMT+09:00 Markos Chandras <Markos.Chandras@...tec.com>:
> Hi,
>
> It seems I am unable to boot my Malta with EVA. The problem appeared in
> the 3.18 merge window. I bisected the problem (between v3.17 and
> v3.18-rc1) and I found the following commit responsible for the broken boot.

Hello,

Did you start to bisect from v3.18-rc1?
I'd like to be sure that this is another bug which is fixed by following commit.

commit 85c9f4b04a08f6bc770b77530c22d04103468b8f
Author: Joonsoo Kim <iamjoonsoo.kim@....com>
Date:   Mon Oct 13 15:51:01 2014 -0700

    mm/slab: fix unaligned access on sparc64

This fix is merged into v3.18-rc1 sometime later that
'support slab merge' is merged.

Thanks.

> commit 12220dea07f1ac6ac717707104773d771c3f3077
> Author: Joonsoo Kim <iamjoonsoo.kim@....com>
> Date:   Thu Oct 9 15:26:24 2014 -0700
>
>     mm/slab: support slab merge
>
>
> Reverting my tree back to the parent of that commit
> 423c929cbbecc60e9c407f9048e58f5422f7995d ("
> mm/slab_common: commonize slab merge logic")
>
> restores the boot for me.
>
> I don't quite understand the commit yet so let me know if you need more
> information to debug this problem
>
> Here is the kernel log of the failed boot.
>
> Calibrating delay loop... 19.86 BogoMIPS (lpj=99328)
> pid_max: default: 32768 minimum: 301
> Mount-cache hash table entries: 4096 (order: 0, 16384 bytes)
> Mountpoint-cache hash table entries: 4096 (order: 0, 16384 bytes)
> Kernel bug detected[#1]:
> CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.17.0-05639-g12220dea07f1 #1631
> task: 1f04f5d8 ti: 1f050000 task.ti: 1f050000
> $ 0   : 00000000 806c0000 00000080 00000000
> $ 4   : 1f048080 00000001 00000001 00000000
> $ 8   : 1f04f5d8 00000001 fffffffc 00000000
> $12   : 00000000 ffffffff fffef7b7 00000000
> $16   : 1f048080 1f00ec00 1f048180 806ba998
> $20   : 1f00ec00 80660000 1f03b780 806ad380
> $24   : 00000000 80154d70
> $28   : 1f050000 1f053d48 806ba8ec 80141184
> Hi    : 00000000
> Lo    : 0b532b80
> epc   : 80141190 alloc_unbound_pwq+0x234/0x304
>     Not tainted
> ra    : 80141184 alloc_unbound_pwq+0x228/0x304
> Status: 1000dc03        KERNEL EXL IE
> Cause : 00800034
> PrId  : 0001a82d (MIPS P5600)
> Modules linked in:
> Process swapper/0 (pid: 1, threadinfo=1f050000, task=1f04f5d8, tls=00000000)
> Stack : 1f03b880 00000002 1f03b800 80140d90 1f048180 1f03b880 00000002
> 1f03b800
>           1f03bb80 801417a4 1f0481e0 0000000e 1f048180 00000200 1f048180
> 1f048190
>           00000002 1f048188 80660000 80660000 8065af94 80141dc0 0110d710
> 00000100
>           8065af94 806ad380 8065b200 8013ea70 1f048280 1f053e0c 8065af98
> 1f0481e0
>           00000000 00000004 80660000 80660000 80660000 80660000 80660000
> 80660000
>           ...
> Call Trace:
> [<80141190>] alloc_unbound_pwq+0x234/0x304
> [<801417a4>] apply_workqueue_attrs+0x11c/0x294
> [<80141dc0>] __alloc_workqueue_key+0x23c/0x470
> [<80683de4>] init_workqueues+0x320/0x400
> [<8010058c>] do_one_initcall+0xe8/0x23c
> [<8067cbec>] kernel_init_freeable+0x9c/0x224
> [<80565fd8>] kernel_init+0x10/0x100
> [<80104e38>] ret_from_kernel_thread+0x14/0x1c
>
>
> Code: 10400032  00408021  320200ff <00020336> 00002821  02002021
> 0c0defb0  24060100  26020074
> ---[ end trace cb88537fdc8fa200 ]---
> Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
>
> ---[ end Kernel panic - not syncing: Attempted to kill init!
> exitcode=0x0000000b
>
> --
> markos
> --
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