Hi There,

I am working to implement hibernation (Suspend to disk) on ARM and have successfully done that by using swsusp ARM patch by Sebastian Capella. Now I can hibernate (suspend to swap partition in sd card) the kernel using the command echo disk > /sys/power/state and the system will resume its state with the next power on. But if I press reset again the kernel follow a normal boot sequence.

My question is how can I make that swap area and hibernate image in that area permanent, so that in every reset it will awake from that permanent image? I have given the value of swapiness=0 so that I expect there wont be any swapping of pages any more while system is alive. How kernel decide whether go for a normal boot or awake from (resume=/dev/swap_partition) hibernation?

I searched a lot on internet but didn't get a clear idea about how Linux kernel is awaking from hibernation and what it will do with swap after resuming once.Thank you for your time

My kernel version is 3.14