linux-kernel - Re: per-cpu related?

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Date:	Sun, 13 Jul 2008 15:20:05 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	"Vegard Nossum" <vegard.nossum@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"Mike Travis" <travis@....com>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"Steven Rostedt" <rostedt@...dmis.org>
Subject: Re: per-cpu related?

On Sun, Jul 13, 2008 at 2:04 PM, Ingo Molnar <mingo@...e.hu> wrote:
>
> * Yinghai Lu <yhlu.kernel@...il.com> wrote:
>
>> On Sun, Jul 13, 2008 at 11:55 AM, Ingo Molnar <mingo@...e.hu> wrote:
>> >
>> > * Yinghai Lu <yhlu.kernel@...il.com> wrote:
>> >
>> >> thanks
>> >>
>> >> could be caused by max_low_pfn_mapped patch...because hpet still use
>> >> fixmap address that is cleared by others.
>>
>> still got
>>
>> calling  __stack_chk_test+0x0/0x89
>> Testing -fstack-protector-all feature
>> -fstack-protector-all test failed
>> ------------[ cut here ]------------
>> WARNING: at kernel/panic.c:393 __stack_chk_test+0x61/0x89()
>> Modules linked in:
>> Pid: 1, comm: swapper Not tainted 2.6.26-rc9-tip-01873-ga9827e7-dirty #359
>>
>> Call Trace:
>>  [<ffffffff8026615e>] warn_on_slowpath+0x6c/0xa7
>>  [<ffffffff80266199>] ? __stack_chk_test+0x0/0x89
>>  [<ffffffff80266199>] ? __stack_chk_test+0x0/0x89
>>  [<ffffffff8022a4f4>] ? mcount_call+0x5/0x31
>>  [<ffffffff80266199>] ? __stack_chk_test+0x0/0x89
>>  [<ffffffff802661fa>] __stack_chk_test+0x61/0x89
>>  [<ffffffff80e729e4>] kernel_init+0x1de/0x346
>>  [<ffffffff8022a4f4>] ? mcount_call+0x5/0x31
>>  [<ffffffff80262df7>] ? finish_task_switch+0x14/0xe3
>>  [<ffffffff8022b589>] child_rip+0xa/0x11
>>  [<ffffffff80e72806>] ? kernel_init+0x0/0x346
>>  [<ffffffff8022b57f>] ? child_rip+0x0/0x11
>>
>> ---[ end trace 0f276ea63a4e83de ]---
>
> please try latest tip/master - the self-test had to be removed. (gcc
> will treat the stackprotector-failure function as ((noreturn)) attribute
> and will optimize out the return path, making a reliable self-test
> impossible in the way we tried to)
>
ok, you fixed it...
that warning is gone.

YH
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