Hi, We have a OMAP4460 based platform running Android Jellybean. We have observed that OMAP can totally freeze at times, leading to watchdog reboot.
There are two test cases which consistently reproduce the problem - Running Camera Preview - copying large files to eMMC. Both of the above test cases involve heavy DMA. So, we are suspecting that crash may be related to some DMA processing/logic. After the watchdog reboot, last_kmsg consistently show two things - A sudden jump in timestamps prior to crash - Unhandled Fault in the kernel logs. The fault type can vary, but it's mostly one of the following - Unhandled fault: imprecise external abort (0x1406) - Unhandled fault: external abort on non-linefetch (0x1008) >From last_kmsg, the PC/LR is mostly at omap4_prm_inst_read_inst_reg and omap4_pwrdm_read_pwrst respectively. Sometimes at other places (e.g. sched_clock ) Can someone suggest what might be causing this? Regards, Kunal -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
