From: Joe Jin <joe.jin@oracle.com>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Jiang Liu <liuj97@gmail.com>,
"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
david zhuang <david.zhuang@oracle.com>
Subject: Re: Why write CPER_NOTIFY_MCE to ERST when reboot
Date: Sat, 01 Jun 2013 09:33:54 +0800 [thread overview]
Message-ID: <51A94F82.40902@oracle.com> (raw)
In-Reply-To: <3908561D78D1C84285E8C5FCA982C28F2DA71899@ORSMSX106.amr.corp.intel.com>
Tony and Gerry, thanks!
Regards,
Joe
On 06/01/13 02:29, Luck, Tony wrote:
> Gerry has this right - we want to preserve the error information, but we
> don't trust our kernel enough to have it write to a regular disk (perhaps
> it has no access to I/O because of the error - or worse, perhaps it might
> write to the wrong place or the wrong disk).
>
> In theory data the information in the machine check banks is preserved
> across a warm reset for the reboot - but in practice we may sometimes
> need a power-cycle and full cold reset. Also I've heard that on some systems
> the BIOS clears the banks before the OS can see them.
>
> -Tony
>
--
Oracle <http://www.oracle.com>
Joe Jin | Software Development Senior Manager | +8610.6106.5624
ORACLE | Linux and Virtualization
No. 24 Zhongguancun Software Park, Haidian District | 100193 Beijing
prev parent reply other threads:[~2013-06-01 1:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-31 8:22 Why write CPER_NOTIFY_MCE to ERST when reboot Joe Jin
2013-05-31 16:04 ` Jiang Liu
2013-05-31 18:29 ` Luck, Tony
2013-06-01 1:33 ` Joe Jin [this message]
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