On Mon, Nov 11, 2013 at 04:45:51PM +0100, Peter Zijlstra wrote:
> On Mon, Nov 11, 2013 at 09:29:27AM +0800, Fengguang Wu wrote:
> > Greetings,
> >
> > I got the below dmesg and the first bad commit is
> >
> > commit 1ca7d67cf5d5a2aef26a8d9afd789006fa098347
> > Author: John Stultz <john.stu...@linaro.org>
> > Date: Mon Oct 7 15:51:59 2013 -0700
> >
> > seqcount: Add lockdep functionality to seqcount/seqlock structures
> >
>
> > [ 4.124336] uli526x: ULi M5261/M5263 net driver, version 0.9.3
> > (2005-7-29)
> > [ 4.128027] Call Trace:
> > [ 4.128027] [<7908e744>] ? console_unlock+0x353/0x380
> > [ 4.128027] [<79dc7cf2>] dump_stack+0x48/0x60
> > [ 4.128027] [<7908953e>] __lock_acquire.isra.26+0x7e3/0xceb
> > [ 4.128027] [<7908a1c5>] lock_acquire+0x71/0x9a
> > [ 4.128027] [<794079aa>] ? blk_throtl_bio+0x1c3/0x485
> > [ 4.128027] [<7940658b>] throtl_update_dispatch_stats+0x7c/0x153
>
> The below seems to compile with i386-defconfig + CONFIG_CFQ_GROUP_IOSCHED=y
>
> No idea if it runs properly or not; I seem to have misplaced my i386
> root filesystem.
>
> ---
> Subject: block: Employ u64_stats_init()
>
> Now that seqcounts are lockdep tracked thingies, we need to properly
> initialize them, otherwise bad stuff happens.
FYI the warning is still there:
/kernel/i386-randconfig-j7-11082318/d3516a7318f8e22f5462888fdf9edc8f0f128024
+-------------------------------------------------+-------+--------------+--------------+
| | v3.12 | 838cc7b488f8 |
d3516a7318f8 |
+-------------------------------------------------+-------+--------------+--------------+
| boot_successes | 129 | 0 | 0
|
| boot_failures | 1 | 100 | 100
|
| BUG:kernel_early_hang_without_any_printk_output | 1 | |
|
| INFO:trying_to_register_non-static_key | 0 | 100 | 100
|
+-------------------------------------------------+-------+--------------+--------------+
Thanks,
Fengguang
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