From: Borislav Petkov <bp@alien8.de>
To: "河合英宏 / KAWAI，HIDEHIRO" <hidehiro.kawai.ez@hitachi.com>
Cc: "x86@kernel.org" <x86@kernel.org>,
"Jonathan Corbet" <corbet@lwn.net>,
"'Peter Zijlstra'" <peterz@infradead.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
"kexec@lists.infradead.org" <kexec@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Michal Hocko" <mhocko@kernel.org>,
"Ingo Molnar" <mingo@redhat.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Eric W. Biederman" <ebiederm@xmission.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"平松雅巳 / HIRAMATU，MASAMI" <masami.hiramatsu.pt@hitachi.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Ingo Molnar" <mingo@kernel.org>,
"Vivek Goyal" <vgoyal@redhat.com>
Subject: Re: [V4 PATCH 4/4] x86/apic: Introduce noextnmi boot option
Date: Thu, 1 Oct 2015 13:01:10 +0200 [thread overview]
Message-ID: <20151001110110.GA3544@pd.tnic> (raw)
In-Reply-To: <04EAB7311EE43145B2D3536183D1A8445499DB92@GSjpTKYDCembx31.service.hitachi.net>
On Thu, Oct 01, 2015 at 10:24:19AM +0000, 河合英宏 / KAWAI，HIDEHIRO wrote:
> But how do we check if the starting kernel is a dump capture kernel?
How does that first kernel pass info to the capture kernel?
> I think using cmdline option is the simplest way.
More often than not, simplest != correct.
What happens if I pass this option to the first kernel? All of a sudden
my *first* kernel doesn't get external NMIs.
Do you catch my drift?
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
WARNING: multiple messages have this Message-ID (diff)
From: Borislav Petkov <bp@alien8.de>
To: "河合英宏 / KAWAI，HIDEHIRO" <hidehiro.kawai.ez@hitachi.com>
Cc: "'Peter Zijlstra'" <peterz@infradead.org>,
"Jonathan Corbet" <corbet@lwn.net>,
"Ingo Molnar" <mingo@kernel.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Vivek Goyal" <vgoyal@redhat.com>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
"x86@kernel.org" <x86@kernel.org>,
"kexec@lists.infradead.org" <kexec@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Michal Hocko" <mhocko@kernel.org>,
"Ingo Molnar" <mingo@redhat.com>,
"平松雅巳 / HIRAMATU，MASAMI" <masami.hiramatsu.pt@hitachi.com>
Subject: Re: [V4 PATCH 4/4] x86/apic: Introduce noextnmi boot option
Date: Thu, 1 Oct 2015 13:01:10 +0200 [thread overview]
Message-ID: <20151001110110.GA3544@pd.tnic> (raw)
In-Reply-To: <04EAB7311EE43145B2D3536183D1A8445499DB92@GSjpTKYDCembx31.service.hitachi.net>
On Thu, Oct 01, 2015 at 10:24:19AM +0000, 河合英宏 / KAWAI，HIDEHIRO wrote:
> But how do we check if the starting kernel is a dump capture kernel?
How does that first kernel pass info to the capture kernel?
> I think using cmdline option is the simplest way.
More often than not, simplest != correct.
What happens if I pass this option to the first kernel? All of a sudden
my *first* kernel doesn't get external NMIs.
Do you catch my drift?
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
next prev parent reply other threads:[~2015-10-01 11:01 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-25 11:28 [V4 PATCH 0/4] Fix race issues among panic, NMI and crash_kexec Hidehiro Kawai
2015-09-25 11:28 ` Hidehiro Kawai
2015-09-25 11:28 ` [V4 PATCH 1/4] panic/x86: Fix re-entrance problem due to panic on NMI Hidehiro Kawai
2015-09-25 11:28 ` Hidehiro Kawai
2015-09-25 12:13 ` 河合英宏 / KAWAI，HIDEHIRO
2015-09-25 12:13 ` 河合英宏 / KAWAI，HIDEHIRO
2015-09-30 11:26 ` Peter Zijlstra
2015-09-30 11:26 ` Peter Zijlstra
2015-10-01 1:02 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-01 1:02 ` 河合英宏 / KAWAI，HIDEHIRO
2015-09-25 11:28 ` [V4 PATCH 2/4] panic/x86: Allow cpus to save registers even if they are looping in NMI context Hidehiro Kawai
2015-09-25 11:28 ` Hidehiro Kawai
2015-09-30 11:50 ` Peter Zijlstra
2015-09-30 11:50 ` Peter Zijlstra
2015-10-01 1:43 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-01 1:43 ` 河合英宏 / KAWAI，HIDEHIRO
2015-09-25 11:28 ` [V4 PATCH 3/4] kexec: Fix race between panic() and crash_kexec() called directly Hidehiro Kawai
2015-09-25 11:28 ` Hidehiro Kawai
2015-09-28 3:53 ` kbuild test robot
2015-09-28 3:53 ` kbuild test robot
2015-09-28 7:08 ` 河合英宏 / KAWAI，HIDEHIRO
2015-09-28 7:08 ` 河合英宏 / KAWAI，HIDEHIRO
2015-09-30 11:53 ` Peter Zijlstra
2015-09-30 11:53 ` Peter Zijlstra
2015-10-01 2:04 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-01 2:04 ` 河合英宏 / KAWAI，HIDEHIRO
2015-09-28 4:02 ` kbuild test robot
2015-09-28 4:02 ` kbuild test robot
2015-09-28 4:46 ` 河合英宏 / KAWAI，HIDEHIRO
2015-09-28 4:46 ` 河合英宏 / KAWAI，HIDEHIRO
2015-09-25 11:28 ` [V4 PATCH 4/4] x86/apic: Introduce noextnmi boot option Hidehiro Kawai
2015-09-25 11:28 ` Hidehiro Kawai
2015-09-30 11:55 ` Peter Zijlstra
2015-09-30 11:55 ` Peter Zijlstra
2015-10-01 2:33 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-01 2:33 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-01 6:27 ` Peter Zijlstra
2015-10-01 6:27 ` Peter Zijlstra
2015-10-01 7:01 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-01 7:01 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-01 8:43 ` Borislav Petkov
2015-10-01 8:43 ` Borislav Petkov
2015-10-01 10:24 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-01 10:24 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-01 11:01 ` Borislav Petkov [this message]
2015-10-01 11:01 ` Borislav Petkov
2015-10-02 0:58 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-02 0:58 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-02 7:47 ` Borislav Petkov
2015-10-02 7:47 ` Borislav Petkov
2015-10-05 2:03 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-05 2:03 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-05 8:27 ` Borislav Petkov
2015-10-05 8:27 ` Borislav Petkov
2015-10-05 9:21 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-05 9:21 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-05 10:14 ` Borislav Petkov
2015-10-05 10:14 ` Borislav Petkov
2015-10-13 11:55 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-13 11:55 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-13 20:19 ` Thomas Gleixner
2015-10-14 13:54 ` Ingo Molnar
2015-10-14 13:54 ` Ingo Molnar
2015-10-16 1:58 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-16 1:58 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-13 20:22 ` Thomas Gleixner
2015-10-13 20:22 ` Thomas Gleixner
2015-10-14 3:39 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-14 3:39 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-14 7:25 ` Thomas Gleixner
2015-10-16 2:02 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-16 2:02 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-27 8:46 ` Baoquan He
2015-10-27 8:46 ` Baoquan He
2015-10-27 9:01 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-27 9:01 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-27 9:06 ` 'Baoquan He'
2015-10-27 9:06 ` 'Baoquan He'
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=20151001110110.GA3544@pd.tnic \
--to=bp@alien8.de \
--cc=akpm@linux-foundation.org \
--cc=corbet@lwn.net \
--cc=ebiederm@xmission.com \
--cc=hidehiro.kawai.ez@hitachi.com \
--cc=hpa@zytor.com \
--cc=kexec@lists.infradead.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=masami.hiramatsu.pt@hitachi.com \
--cc=mhocko@kernel.org \
--cc=mingo@kernel.org \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
--cc=vgoyal@redhat.com \
--cc=x86@kernel.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.