On Wed, 1 Dec 2010 14:23:14 +0000 "Hawrylewicz Czarnowski, Przemyslaw" <przemyslaw.hawrylewicz.czarnowski@xxxxxxxxx> wrote: > Hi, > > I have found an annoying problem with md module. If it is compiled as loadable module it is impossible to reload module if unloaded once. > > Eg. > # mdadm -Ss > # modprobe -r raid1 && modprobe -r md-mod > # cat /proc/modules | grep md_mod || echo Unloaded > Unloaded > # cat /proc/mdstat > cat /proc/mdstat: Invalid arguments I cannot reproduce this. That this point I get cat: /proc/mdstat: No such file or directory > # modprobe md-mod > # cat /proc/mdstat > cat /proc/mdstat: Invalid argument > # cat /proc/modules | grep md_mod || echo Unloaded > md_mod 94178 0 - Live 0xf857a000 > > Some functionalities seem to work, but nothing is able to read /proc/mdstat. > > If have tried few kernels from 2.6.27 to 2.6.37-rc3, openSUSE 11.x/RHEL6, doesn't matter, still the same result. What can be wrong? openSUSE doesn't compile md as a module, it is compiled in to the kernel. But presumably you are compiling your own kernel with md as a module? Is that right? You aren't compiling a module and loading it into a kernel which already has md in it are you? I don't think that would work anyway... And you give a full sequence of commands from loading to unload that reliably produces this error for you? NeilBrown -- 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
