Hello everyone, First of all, thanks to everyone for the RT patch and it is awesome work. I got stable 3.0.1 + 3.0.1-rt8 patch single-core kernel working on a PandaBoard (with another patch for getting the high resolution timer to work on PandaBoard). With cyclictest, I am seeing a maximum latency of ~25 us (~36 us with some ethernet traffic). The test results are really really promising and kudos to tglx, et al. I am also planning to run the tests for a longer period of time. However, with the RT patch applied, I cannot get the SMP kernel to boot [Note: stable 3.0.1 SMP kernel boots just fine without RT patch]. I have tried with and without the other high-resolution timer patch. It hangs the same way very early with the following message: ************* reading uImage 2828444 bytes read Booting from mmc0 ... ## Booting kernel from Legacy Image at 82000000 ... Image Name: Linux-3.0.1-rt8+ Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 2828380 Bytes = 2.7 MiB Load Address: 80008000 Entry Point: 80008000 Verifying Checksum ... OK Loading Kernel Image ... OK OK Starting kernel ... Uncompressing Linux... done, booting the kernel. ************* I have attached 4 kernel config files - 2 booting fine and 2 not booting (Legend for interpreting file names: sc = single core, rt = rt-patch, hrt = high-resolution-timer-patch) Note: I have tried even earlier version of the RT patches and all of them fail. However, I vaguely recall the first or second RT patch that was released booted SMP fine but I cannot make it work again now. Has anyone been successful in booting SMP on panda board or other OMAP4/ARM targets with RT patch? Is there anything wrong with my config files for SMP with RT patch on ARM? Any suggestions to debug early hangs on panda board with RT patch ? Thanks in advance, Sankara Muthukrishnan
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