From: Yinghai Lu <yinghai@kernel.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
Suresh Siddha <suresh.b.siddha@intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: tip/master broken with x2apic and kexec
Date: Tue, 13 Jul 2010 16:27:12 -0700 [thread overview]
Message-ID: <4C3CF650.30905@kernel.org> (raw)
In-Reply-To: <4C3CE210.2030902@zytor.com>
On 07/13/2010 03:00 PM, H. Peter Anvin wrote:
> On 07/12/2010 07:59 PM, Yinghai Lu wrote:
>> tip/master:
>> system1: BIOS enabled x2apic, first kernel boot well, and when kexec second kernel will cause system instant reboot.
>>
>> system2: BIOS not enable x2apic, first kernel boot well and enable x2apic, and kexec second kernel well. but when kexec third kernel will case system instant reboot.
>>
>> linus' tree is ok.
>>
>> but for system2 if boot with nox2apic ,intr-remaping off, iommu off, the kexec loop test will pass.
>>
>> the problem looks start in recent two or three weeks.
>>
>> Any idea?
>>
>> bisecting will take a while, because the system post take a while everytime.
>>
>> Thanks
>>
>> Yinghai Lu
>
> OK, I found the bug... if you could test out the patch which will be
> sent out shortly I would very much appreciate it.
not sure if your patch is the offending one now.
kL: kernel from linus tree
kT1: kernel from tip
kT2: kernel from tip with reverting your patch
BIOS-->kL ---> kL ---> kL....always working
BIOS-->kT1 ---> kT1 ---> kT1 : between second one and third one system reset instant...
BIOS-->kT2 ---> kT2 ---> kT2 : between second one and third one system reset instant...
BIOS-->kL ---> kL ---> kL ---> then kT1 ---> kT1 .... always working
BIOS-->kL ---> kL ---> kL ---> then kT2 ---> kT2 .... always working
looks like first kernel and second one can not be kernel from tip.
Yinghai
next prev parent reply other threads:[~2010-07-13 23:30 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-13 2:59 tip/master broken with x2apic and kexec Yinghai Lu
2010-07-13 3:29 ` Yinghai Lu
2010-07-13 6:40 ` H. Peter Anvin
2010-07-14 0:54 ` [tip:x86/alternatives] x86, alternatives: Fix one more open-coded 8-bit alternative number tip-bot for H. Peter Anvin
2010-07-14 0:54 ` [tip:x86/alternatives] x86, alternatives: BUG on encountering an invalid CPU feature number tip-bot for H. Peter Anvin
2010-07-13 22:00 ` tip/master broken with x2apic and kexec H. Peter Anvin
2010-07-13 23:27 ` Yinghai Lu [this message]
2010-07-14 20:35 ` Yinghai Lu
2010-07-14 21:05 ` Don Zickus
2010-07-14 22:07 ` Yinghai Lu
2010-07-14 21:23 ` Yinghai Lu
2010-07-14 22:57 ` Yinghai Lu
2010-07-15 0:03 ` Suresh Siddha
2010-07-15 2:01 ` Yinghai Lu
2010-07-15 7:00 ` [PATCH] x86: fix x2apic preenabled system with kexec Yinghai Lu
2010-07-15 18:16 ` Suresh Siddha
2010-07-15 20:10 ` Yinghai Lu
2010-07-15 20:40 ` Yinghai Lu
2010-07-17 0:48 ` [tip:x86/urgent] x86: Fix " tip-bot for Yinghai Lu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4C3CF650.30905@kernel.org \
--to=yinghai@kernel.org \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=suresh.b.siddha@intel.com \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).