Hi, Don Thanks for your feedback! Unfortunately, the hardlockup depends on NMI which is not available on ARM (Cortex-A9) per my understanding. Our system uses OMAP4430. Any more suggestions? On Tue, Jan 31, 2012 at 11:47 PM, Don Zickus <dzickus@xxxxxxxxxx> wrote: > On Tue, Jan 31, 2012 at 03:28:09PM +0800, TAO HU wrote: >> Resend with a new subject >> >> On Wed, Jan 25, 2012 at 4:24 PM, TAO HU <tghk48@xxxxxxxxxxxx> wrote: >> > Hi, All >> > >> > While playing kernel 3.0.8 with below test code, it does NOT report >> > any softlockup with 60%~70% chances. >> > NOTE: the softlockup timeout is set to 10 seconds (i.e. >> > watchdog_thresh=5) in my test. >> > ... ... >> > preempt_disable(); >> > local_irq_disable(); >> > for (i = 0; i < 20; i++) >> > mdelay(1000); >> > local_irq_enable(); >> > preempt_enable(); >> > ... ... >> > >> > However, if I remove local_irq_disable()/local_irq_enable() it will >> > report softlockup with no problem. >> > I believe it is due to that after local_irq_enable() >> > touch_softlockup_watchdog() is called prior softlockup timer. > > Hi Hu, > > Honestly, you should be getting hardlockup warnings if you are disabling > interrupts. Do you see anything in the console output? > > Cheers, > Don -- Best Regards Hu Tao -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
