From mboxrd@z Thu Jan  1 00:00:00 1970
From: kirill@shutemov.name (Kirill A. Shutemov)
Date: Tue, 28 Oct 2014 12:54:58 +0200
Subject: [lttng-dev] Progress on system crash traces with LTTng using
	DAX and pmem
In-Reply-To: <465653369.1985.1414241485934.JavaMail.zimbra@efficios.com>
References: <1254279794.1957.1414240389301.JavaMail.zimbra@efficios.com>
 <465653369.1985.1414241485934.JavaMail.zimbra@efficios.com>
Message-ID: <20141028105458.GA9768@node.dhcp.inet.fi>

On Sat, Oct 25, 2014 at 12:51:25PM +0000, Mathieu Desnoyers wrote:
> FYI, the main reason why my customer wants to go with a
> "trace into memory that survives soft reboot" approach
> rather than to use things like kexec/kdump is that they
> care about the amount of time it takes to reboot their
> machines. They want a solution where they can extract the
> detailed crash data after reboot, after the machine is
> back online, rather than requiring a few minutes of offline
> time to extract the crash details.

IIRC, on x86 there's no guarantee that your memory content will be
preserved over reboot. BIOS is free to mess with it.

-- 
 Kirill A. Shutemov