Hi Dan, Looks like dmatest_init() is not being called. When I load the dmatest.ko I don't see any errors or threads getting created. Is there any other options I need to select ? Thanks, Marri -----Original Message----- From: Dan Williams [mailto:dan.j.williams@xxxxxxxxx] Sent: Wednesday, July 08, 2009 5:56 PM To: Tirumala Reddy Marri Cc: linux-raid@xxxxxxxxxxxxxxx Subject: RE: Question on RAID-5 using ADMA On Wed, 2009-07-08 at 15:55 -0700, Tirumala Reddy Marri wrote: > I enabled the test. But I don't know how to run it. I have my own version of XOR test which verify the XOR operation. In general regular RADI-5 creation and creating file system works fine. Then I was doing some destructive tests to verify the stability that is where I am running into this issue. > Thanks, > Marri It can be a bit tricky to enable here are the steps: 1/ Disable other clients from consuming dma engines, i.e. set CONFIG_NET_DMA=n and CONFIG_ASYNC_TX_DMA=n 2/ Make sure that your driver loads before the dmatest module loads, otherwise it won't find any channels to test: modprobe your_driver modrpobe dmatest Note: If you build your driver and dmatest into the kernel dmatest will use late_initcall to initialize after your driver. 3/ Verify that the xor-threads are running. You should see something like the following in top: top - 00:02:31 up 2 min, 1 user, load average: 6.52, 2.87, 1.09 Tasks: 53 total, 8 running, 45 sleeping, 0 stopped, 0 zombie Cpu(s): 4.7%us, 93.8%sy, 0.0%ni, 0.5%id, 0.0%wa, 0.1%hi, 0.9%si, 0.0%st Mem: 807700k total, 31052k used, 776648k free, 0k buffers Swap: 0k total, 0k used, 0k free, 17224k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 788 root 30 10 0 0 0 R 14.6 0.0 0:19.47 dma0chan0-xor0 790 root 30 10 0 0 0 R 14.6 0.0 0:19.48 dma1chan0-xor0 792 root 30 10 0 0 0 R 14.6 0.0 0:19.47 dma2chan0-xor0 793 root 30 10 0 0 0 R 14.6 0.0 0:19.49 dma2chan0-pq0 787 root 30 10 0 0 0 R 12.8 0.0 0:19.55 dma0chan0-copy0 789 root 30 10 0 0 0 R 12.8 0.0 0:19.57 dma1chan0-copy0 791 root 30 10 0 0 0 R 12.8 0.0 0:19.55 dma2chan0-copy0 4/ Errors will be logged to the console, and you will get summary of tests passing/failing when you remove the dmatest module. -- Dan -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
