Hi... On Fri, May 21, 2010 at 19:33, Shyam Burkule <shyam.burkule@xxxxxxxxx> wrote: > Hi All, > I am using Linux kernel 2.6.27(SLES11). I am getting one strange problem. > I am using task_pid function followed by get_pid function to get pid > structure. > Here is code snippet, > struct *pid = get_pid(task_pid(current)); > > I am saving this pid structure in a variable which is used later to kill the > same process using kill_pid providing the same "pid *" which we saved > earlier. Since kill_pid() requires "pid *", we have save this somewhere > during process creation. Whenever we use get(task_pid(current)) in the code, > I observed that the process is not visible in "ps -ef" as well as "/proc" > filesystem. The codes say that get_pid increments the "count" field of the pid struct. I failed to find the related code in fs/proc that says anything about "don't show a task with count higher than 0". Thus, I could offer two hypotheses: a. The code that "hides" the pid in /proc is something else, probably additional code not included in mainline (since you're saying it's SLES kernel, right?) b. it's just coincidence, that when you do something on this pid, you accidentally remove the task structure, or at least the pid struct. Hopefully I offer you helpful arguments... -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
