From: Borislav Petkov <bp@alien8.de>
To: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Luck, Tony" <tony.luck@intel.com>,
Ingo Molnar <mingo@kernel.org>,
Prarit Bhargava <prarit@redhat.com>,
Vivek Goyal <vgoyal@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Junichi Nomura <j-nomura@ce.jp.nec.com>,
Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Subject: Re: [PATCH v8] x86: mce: kexec: switch MCE handler for kexec/kdump
Date: Fri, 10 Apr 2015 09:24:48 +0200 [thread overview]
Message-ID: <20150410072448.GA28074@pd.tnic> (raw)
In-Reply-To: <20150410040726.GB3623@hori1.linux.bs1.fc.nec.co.jp>
On Fri, Apr 10, 2015 at 04:07:26AM +0000, Naoya Horiguchi wrote:
> ... wait, changing cpu_online_mask might confuse admins who try to
> analyze the kdump, especially when the problems causing panic are CPU
> related issues?
Well, if you're offlining the CPUs before doing the dump, you're already
changing the system, aren't you? So why lie to people?
> In the similar way, changing tolerant value loses the original value,
> although this is unlikely to be a problem. But if we change it, using
> an upper bit to keep lowest 2 bit to save the original value is better?
I don't think that you need to do that - you can see from the original
kernel's dmesg whether an MCE happened - we're normally very vocal. If
the user tried to deliberately suppress that, then that's her fault
only.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
--
next prev parent reply other threads:[~2015-04-10 7:27 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-03 9:01 [PATCH v3 1/2] x86: mce: kexec: switch MCE handler for kexec/kdump Naoya Horiguchi
2015-03-03 9:01 ` [PATCH v3 2/2] x86: mce: comment about MCE synchronization timeout on definition of tolerant Naoya Horiguchi
2015-03-03 18:09 ` [PATCH v3 1/2] x86: mce: kexec: switch MCE handler for kexec/kdump Luck, Tony
2015-03-04 7:41 ` [PATCH v4] " Naoya Horiguchi
2015-03-04 23:12 ` Luck, Tony
2015-03-05 1:24 ` Naoya Horiguchi
2015-03-05 6:45 ` [PATCH v5] " Naoya Horiguchi
2015-03-05 8:57 ` Borislav Petkov
2015-03-05 9:37 ` Naoya Horiguchi
2015-03-06 2:59 ` [PATCH v6] " Naoya Horiguchi
2015-03-06 8:34 ` Borislav Petkov
2015-03-06 9:09 ` Naoya Horiguchi
2015-03-06 9:27 ` Borislav Petkov
2015-03-06 9:32 ` Naoya Horiguchi
2015-03-06 10:22 ` [PATCH v7] " Naoya Horiguchi
2015-04-06 7:18 ` Naoya Horiguchi
2015-04-06 11:59 ` Borislav Petkov
2015-04-07 8:00 ` Naoya Horiguchi
2015-04-07 8:02 ` [PATCH v8] " Naoya Horiguchi
2015-04-09 6:13 ` Borislav Petkov
2015-04-09 6:57 ` Naoya Horiguchi
2015-04-09 7:02 ` Borislav Petkov
2015-04-09 18:07 ` Luck, Tony
2015-04-09 8:00 ` Ingo Molnar
2015-04-09 8:21 ` Borislav Petkov
2015-04-09 8:59 ` Naoya Horiguchi
2015-04-09 9:53 ` Borislav Petkov
2015-04-09 18:22 ` Luck, Tony
2015-04-09 19:05 ` Borislav Petkov
2015-04-10 0:49 ` Naoya Horiguchi
2015-04-10 4:07 ` Naoya Horiguchi
2015-04-10 7:24 ` Borislav Petkov [this message]
2015-04-28 8:41 ` Baoquan He
2015-04-09 8:39 ` Naoya Horiguchi
2015-04-09 9:13 ` Ingo Molnar
2015-04-06 11:56 ` [PATCH v7] " Borislav Petkov
2015-04-07 7:59 ` Naoya Horiguchi
2015-03-06 8:28 ` [PATCH v5] " Borislav Petkov
2015-03-06 5:44 ` [PATCH v4] " Naoya Horiguchi
2015-03-05 8:48 ` Borislav Petkov
2015-03-03 18:53 ` [PATCH v3 1/2] " Borislav Petkov
2015-03-04 7:51 ` Naoya Horiguchi
2015-03-04 9:12 ` Borislav Petkov
2015-03-05 1:27 ` Naoya Horiguchi
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