Hi.... :)

On Sun, Mar 4, 2012 at 20:16, Peter Senna Tschudin
[off-list ref] wrote:

[ ?858.634435] kernel/pid.c:425 find_task_by_pid_ns() needs
rcu_read_lock() protection!

hmm....ok....kernel said that.... so...

int yfkm2_is_pid_running(pid_t pid)
{
? ? ? ?struct task_struct *q;

? ? ? ?q = find_task_by_vpid(pid);

I think this section that makes kernel barf. It wants you to grab
rcu_read_lock(), right before you do find_task_by_vpid().

What do you think? :)

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com