Hi... On Thu, Nov 6, 2008 at 1:16 PM, Sukanto Ghosh <sukanto.cse.iitb@xxxxxxxxx> wrote: > Hi, > > Couple of questions: > > 1. How to determine the number of processes in memory ? (inside > kernel code, not shell : ps -ef | wc -l ) i forgot the list name, but all you need is to walk over the run queue that contains TASK_RUNNING processes > 2. Is there any provision for swapping out entire process in linux (as > solaris has) ? never saw such function before. You can do things like "dd if=/dev/zero bs=4K" so the pages will be forced to be swapped out, but then it will swap all pages...not just ones belong to single process. > If no, then how to make sure that a process all of whose pages have > been swapped out is not scheduled again ? (may be by changing the > process-state) by making that process state as non TASK_RUNNING (or TASK_RUNNABLE...forgot which one). > And, how to later enable the process so that it gets scheduled ? put it back to TASK_RUNNING/RUNNABLE. Make sure you use function...IIRC set_task_state() to avoid race condition in SMP. regards, Mulyadi. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
