On Wed, Dec 21, 2011 at 11:48:36AM +0100, Lukas Erlinghagen wrote: > Dear list, > > we're getting the kernel panic postet below on our system (Kernel > version is 3.0.3-rt11, the platform is an embedded PowerPC 440 in a Are you aware that there are newer versions available? 3.0.14-rt31 is the most recent 3.0 release. Don't know if it has any uio fixes though. > Virtex 5 FPGA, the device controlled by the UIO driver is a > Freescale MFR4310 controller, and the interrupt is triggered by a > high-active interrupt pin). This panic only occurs when using > CONFIG_PREEMPT_RT_FULL, and only under high interrupt load on the > MFR. > > I've also included our IRQ handler (registered with IRQF_ONESHOT) > and IRQ control function. > > Is there something fundamentally wrong we're doing, and if so, where > can I find information on The Right Way to write UIO drivers for the > RT kernel? > > Thanks in advance for any insight you can provide. > > Kernel panic: > > ------------[ cut here ]------------ > kernel BUG at kernel/rtmutex.c:724! That's a recursive spinlock. Try enabling CONFIG_PROVE_LOCKING. Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | http://www.pengutronix.de/ | -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
