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Date: Tue, 21 Jan 2003 12:50:39 +0000
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
Message-ID: <20030121125039.GA5997@codemonkey.org.uk>
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	Linus Torvalds <torvalds@transmeta.com>,
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References: <20030121011954.GO20972@ca-server1.us.oracle.com>
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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
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