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* Thomas Gleixner <tglx@linutronix.de> wrote: > From: Ingo Molnar <mingo@elte.hu> > > The lock validator detected a possible deadlock between tasklist lock > and task->pi_lock. Prevent the deadlock by disabling interrupts across > pi_lock operations. some background about how this bug sneaked in: we have pi_lock as an irq-safe lock in the -rt tree but we didnt realize that it was needed in the pi-futex implementation too. The race window is pretty narrow there so it didnt trigger during testing. (the window is wider in -rt) Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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