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Date: Thu, 11 Sep 2008 19:57:08 -0700 From: Andrew Morton <akpm@...ux-foundation.org> To: j_kernel@...litt.com Cc: linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>, bugme-daemon@...zilla.kernel.org Subject: Re: [Bugme-new] [Bug 11543] New: kernel panic: softlockup in tick_periodic() ??? On Thu, 11 Sep 2008 16:54:58 -1000 j_kernel@...litt.com wrote: > > The panic code called the kexec code which called mutex_trylock() which > > called spin_lock_mutex() which then stupidly went and blurted a load of > > debug stuff because of in_interrupt(). > > > > Something like this: > > > > --- a/include/linux/debug_locks.h~a > > +++ a/include/linux/debug_locks.h > > @@ -17,7 +17,7 @@ extern int debug_locks_off(void); > > ({ \ > > int __ret = 0; \ > > \ > > - if (unlikely(c)) { \ > > + if (!oops_in_progress && unlikely(c)) { \ > > if (debug_locks_off() && !debug_locks_silent) \ > > WARN_ON(1); \ > > __ret = 1; \ > > _ > > > > might prevent the debugging code from preventing us from finding bugs :( > > Do you want me to give that patch a try or sit tight for a bit? It's be good if you can try it please, see if we can get a cleaner trace. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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