linux-kernel - Re: [GIT PULL] x86/vdso changes for v3.1

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Date:	Thu, 25 Aug 2011 15:37:32 -0400
From:	Arnaud Lacombe <lacombar@...il.com>
To:	Andrew Lutomirski <luto@....edu>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [GIT PULL] x86/vdso changes for v3.1

Hi,

On Thu, Aug 25, 2011 at 3:16 PM, Andrew Lutomirski <luto@....edu> wrote:
> On Thu, Aug 25, 2011 at 10:06 AM, Arnaud Lacombe <lacombar@...il.com> wrote:
>> On Thu, Aug 25, 2011 at 7:51 AM, Andrew Lutomirski <luto@....edu> wrote:
>>> On Thu, Aug 25, 2011 at 1:58 AM, Arnaud Lacombe <lacombar@...il.com> wrote:
>>>> Hi,
>
>>>>
>>>> commit 59e97e4d6fbcd5b74a94cb48bcbfc6f8478a5e93
>>>> Author: Andy Lutomirski <luto@....edu>
>>>> Date:   Wed Jul 13 09:24:10 2011 -0400
>>>>
>>>>    x86: Make alternative instruction pointers relative
>>>>
>>>>    This save a few bytes on x86-64 and means that future patches can
>>>>    apply alternatives to unrelocated code.
>>>>
>>>>    Signed-off-by: Andy Lutomirski <luto@....edu>
>>>>    Link: http://lkml.kernel.org/r/ff64a6b9a1a3860ca4a7b8b6dc7b4754f9491cd7.1310563276.git.luto@mit.edu
>>>>    Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
>>>>
>>>
>>> I probably missed a hardcoded alternative entry that depends on
>>> config.  Can you send me your System.map and the output of objdump -s
>>> -j .altinstructions vmlinux?
>>>
>> see attached.
>>
>>> I'm also having issues building from your .config.  Building
>>> 59e97e4d6fbcd5b74a94cb48bcbfc6f8478a5e93 asks me about Moorestown MID
>>> platform, Ethernet, etc.
>>>
>> yes, the config is against -rc3. An `oldnoconfig' should do the job
>> before the build.
>>
>
> I still can't reproduce this.  I'm building the attached .config on
> the v3.1-rc3, running make ARCH=i386 oldnoconfig (which spews a lot of
> changes),
frak... I sent a stale .config, the right one should be attached. In
the mean time, I'll try your patch.

sorry,
 - Arnaud

> then building with ARCH=i386 and test-booting in KVM.   No
> panic.
>
> Can you either send me a real .config and exact commit that you're
> building or try the attached patch and tell me what it says?
>
> Thanks,
> Andy
>

Download attachment "dot-config" of type "application/octet-stream" (32891 bytes)