linux-kernel - how can I touch softlockup watchdog on all cpus?

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Date:	Wed, 21 Mar 2007 17:06:34 +0100
From:	"Cestonaro, Thilo \(external\)" 
	<Thilo.Cestonaro.external@...itsu-siemens.com>
To:	<linux-kernel@...r.kernel.org>
Subject: how can I touch softlockup watchdog on all cpus?

Hey,

my module generates this ugly softlockup dump, because all cpus are stopped longer then 10 secs.
What I do is:
[code]
local_irq_disable();
// my stuff which takes long and stopps all cpus
.....
touch_softlockup_watchdog();
local_irq_enable();
[/code]

this prevents a dump of my current cpu but not for all.
A call to smp_call_function with a function which calls touch_softlockup_watchdog in it,
doesn't work because smp_call_function needs to be done with irqs enabled, so the watchdog comes first :(.

Any hints or ideas how I can do it in a better way? Disabling softlockup watchdog is not possible for me.

Ciao Thilo
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