From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: Direct writing to the IDE on panic?
Date: Fri, 14 Apr 2006 15:28:34 +0100 [thread overview]
Message-ID: <1145024914.17531.21.camel@localhost.localdomain> (raw)
In-Reply-To: <1144936547.1336.20.camel@localhost.localdomain>
On Iau, 2006-04-13 at 09:55 -0400, Steven Rostedt wrote:
> Hi,
>
> I was wondering if anyone has done some work to directly write and poll
> to the IDE? This is to store data on a panic or oops. So it would need
> to bypass pretty much all the normal Linux mechanisms to do low lever
> IDE work.
I've seen some 2.4 work here. For 2.6 the current focus is kexec of
course
> Obviously, this would be a slow process, but the system has crashed and
> we care more about retrieving information than speed.
>
> Has this already been done and what issues need to be addressed?
The big issue is 'how am I sure the partition data and code I run are
valid post crash'. You don't want the risk of dumping to the wrong part
of the disk and making a crash into a disaster.
next prev parent reply other threads:[~2006-04-14 14:19 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-13 13:55 Steven Rostedt
2006-04-14 14:28 ` Alan Cox [this message]
2006-04-14 14:27 ` Steven Rostedt
2006-04-14 14:52 ` Alan Cox
2006-04-14 14:54 ` Steven Rostedt
2006-04-14 15:52 ` Randy.Dunlap
2006-04-15 15:05 ` Steven Rostedt
2006-04-15 16:45 ` Randy.Dunlap
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