From: ebiederm@xmission.com (Eric W. Biederman)
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: hacklu <embedway.linux@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] x86, boot: Optimize the elf header handling.
Date: Sun, 01 Jul 2012 09:08:01 -0700 [thread overview]
Message-ID: <87wr2nsbvi.fsf@xmission.com> (raw)
In-Reply-To: <4FF06DF4.4000006@zytor.com> (H. Peter Anvin's message of "Sun, 01 Jul 2012 08:34:12 -0700")
"H. Peter Anvin" <hpa@zytor.com> writes:
> On 07/01/2012 08:04 AM, H. Peter Anvin wrote:
>>
>> Sadly, this patch breaks the boot with of of my standard configurations
>> (attached)... it goes into an infinite reboot loop. This was the first
>> config I tested, so it might very well break more.
>>
>
> Some more investigation: the boot crashes because the .data..percpu
> segment is all zero -- since this includes the GDT, we die quickly and
> dramatically only a handful of instructions into head_64.S.
>
> I'm dropping this patchset for now.
Fair enough. But ugh.
Can you point me at your config?
Can you tell me your linker version?
I tested this originally on both x86_64 and i386, and it
worked both places for me.
I want to stair at that failure mode. I am wondering what happened
in your configuration that is different from mine. Perhaps a linker
bug? A subtle conflict with something else? The patch didn't do
anything that should have affectected per cpu sections...
Eric
next prev parent reply other threads:[~2012-07-01 16:08 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-17 5:56 why the decompressed procedure move kernel from address 0x100000(1M) to 0x1000000(16M) +x hacklu
2012-06-02 23:48 ` Eric W. Biederman
2012-06-03 3:10 ` H. Peter Anvin
2012-06-03 8:41 ` Eric W. Biederman
2012-06-03 13:01 ` H. Peter Anvin
2012-06-03 20:30 ` [PATCH 1/2] x86, boot: Don't overlap the compressed and non-compressed image Eric W. Biederman
2012-06-03 20:32 ` [PATCH 2/2] x86, boot: Optimize the elf header handling Eric W. Biederman
2012-07-01 14:56 ` [tip:x86/boot] " tip-bot for Eric W. Biederman
2012-07-01 15:04 ` [PATCH 2/2] " H. Peter Anvin
2012-07-01 15:34 ` H. Peter Anvin
2012-07-01 16:08 ` Eric W. Biederman [this message]
2012-07-01 16:11 ` H. Peter Anvin
2012-07-01 16:26 ` Eric W. Biederman
2012-07-01 16:44 ` H. Peter Anvin
2012-07-01 17:09 ` Eric W. Biederman
2012-07-01 17:15 ` H. Peter Anvin
2012-07-01 18:25 ` Eric W. Biederman
2012-07-01 18:37 ` H. Peter Anvin
2012-07-01 19:20 ` Eric W. Biederman
2012-07-01 19:23 ` H. Peter Anvin
2012-07-01 20:40 ` Eric W. Biederman
2012-07-01 20:52 ` H. Peter Anvin
2012-07-09 6:50 ` Eric W. Biederman
2012-07-09 6:52 ` [PATCH 1/4] x86 boot: Jump to the entry point address in the elf header Eric W. Biederman
2012-07-09 6:53 ` [PATCH 2/4] x86 boot: Optimize the elf header handling Eric W. Biederman
2012-07-09 6:55 ` [PATCH 3/4] x86 boot: When building vmlinux.bin properly precompute the memory image Eric W. Biederman
2012-07-09 6:56 ` [PATCH 4/4] x86 boot: Tell ld the kernel doesn't want 2MB file offset alignment Eric W. Biederman
2012-07-09 6:59 ` [PATCH 1/4] x86 boot: Jump to the entry point address in the elf header Eric W. Biederman
2012-07-02 16:56 ` [PATCH 2/2] x86, boot: Optimize the elf header handling Tejun Heo
2012-07-09 7:03 ` Eric W. Biederman
2012-07-01 2:23 ` [PATCH 1/2] x86, boot: Don't overlap the compressed and non-compressed image Eric W. Biederman
2012-07-01 2:32 ` H. Peter Anvin
2012-07-01 5:22 ` Eric W. Biederman
2012-07-01 14:55 ` [tip:x86/boot] x86, boot: Don' t " tip-bot for Eric W. Biederman
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