From: Dave Jones <davej@codemonkey.org.uk>
To: Joel Becker <Joel.Becker@oracle.com>
Cc: lkml <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@digeo.com>,
Linus Torvalds <torvalds@transmeta.com>,
Wim Coekaerts <Wim.Coekaerts@oracle.com>
Subject: Re: [PATCH][2.5] hangcheck-timer
Date: Tue, 21 Jan 2003 12:50:39 +0000 [thread overview]
Message-ID: <20030121125039.GA5997@codemonkey.org.uk> (raw)
In-Reply-To: <20030121011954.GO20972@ca-server1.us.oracle.com>
On Mon, Jan 20, 2003 at 05:19:54PM -0800, Joel Becker wrote:
> Folks,
> Attached is a patch adding hangcheck-timer. It is used to detect
> when the system goes out to lunch for a period of time, and then
> returns. This is interesting for debugging drivers as well as for
> clustering environments.
> The module sets a timer. When the timer goes off, it then uses
> get_cycles() to determine how much real time has passed.
> On a normal system, the real elapsed time will be almost
> identical to the expected timer duration. However, if a device decided
> to udelay for 60 seconds (or some other circumstance), the module takes
> notice. If the margin of error passes a threshold, the driver prints a
> warning or the machine is rebooted.
Hi Joel,
I'm puzzled. What does this do that softdog.c doesn't ?
Dave
--
| Dave Jones. http://www.codemonkey.org.uk
| SuSE Labs
next prev parent reply other threads:[~2003-01-21 12:44 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-21 1:19 [PATCH][2.5] hangcheck-timer Joel Becker
2003-01-21 8:11 ` Christoph Hellwig
2003-01-21 17:33 ` Joel Becker
2003-01-21 18:44 ` [PATCH (take 2)][2.5] hangcheck-timer Joel Becker
2003-01-21 18:59 ` Christoph Hellwig
2003-01-21 19:48 ` Joel Becker
2003-01-21 19:56 ` Christoph Hellwig
2003-01-21 19:04 ` Sam Ravnborg
2003-01-21 12:50 ` Dave Jones [this message]
2003-01-21 17:40 ` [PATCH][2.5] hangcheck-timer Joel Becker
2003-01-21 17:42 ` Dave Jones
2003-01-21 18:42 ` Joel Becker
[not found] <200301210135.h0L1ZFa06867@eng2.beaverton.ibm.com>
2003-01-21 1:42 ` john stultz
2003-01-21 2:00 ` Joel Becker
2003-01-21 2:45 ` john stultz
2003-01-21 17:29 ` Joel Becker
2003-01-21 20:03 ` john stultz
2003-01-21 20:30 ` Joel Becker
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