Messages in this thread | | | Subject | Re: locking issue (hardirq+softirq+user) | From | Arjan van de Ven <> | Date | Wed, 20 Dec 2006 14:50:18 +0100 |
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On Wed, 2006-12-20 at 14:35 +0100, Jiri Slaby wrote: > Hi! > > an user still gets NMI watchdog warning, that the machine deadlocked.
have you tried enabling LOCKDEP ?
> isr() /* i.e. hardirq context */ > { > spin_lock(&lock); > ... > spin_unlock(&lock); > }
this is ok if you are 100% sure that this never gets called in any other way
> > timer() /* i.e. softirq context */ > { > unsigned int f; > spin_lock_irqsave(&lock, f) /* stack shows, that it locks here */
this is a bug, the flags are an "unsigned long" not "unsigned int"! It may do really bad stuff!
Greetings, Arjan van de Ven
-- if you want to mail me at work (you don't), use arjan (at) linux.intel.com Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org
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