Hi Pooja, I am aware of set_task_state() and friends. The problem as I see it is that I need to do this from the context of a different process. In other words, running from the context of process A, I want to stop process B from running for some time. Process B could be in any state at the moment I attempt to stop it, including being blocked on something etc. I am not sure what would happen if I call interruptible_sleep_on on a process that is already blocked. Do you know if this is okay? Did you run into this problem? TIA, Vamsi. On Sat, Feb 09, 2002 at 06:40:52AM +0000, Pooja Gupta wrote: > Hi Vamsi, > You can do this by just having the task_struct for > the task you want to make to sleep. > > You can use the macros predefined in linux/sched.h > like set_task_state(....) or set_current_state(..) by > the different states in the same file. Set the state > to TASK_INTERRUPTIBLE, etc.Call schedule() after that. > > You can even use interruptible_sleep_on(..) for making > the process sleep. > > To find out the task_struct, use the function > find_task_by_pid(..). > > > You can easily do this. This has worked out in my > code. > > Hope this helps, > > Pooja. > > > > --- "Vamsi Krishna S ." <vamsi@in.ibm.com> wrote: > > Hello, > > > > I need to stop a process temporarily from the > > context of a different process. > > > > I can't send it SIGKILL, I need to stop it > > _temporarily_. > > I can't send it SIGSTOP (I think); if the process is > > being ptrace'd the parent > > will get control, not what we want. > > > > I suspect we should be able to achieve this by > > fiddling with task->state bits > > but not sure, especially considering that the target > > process could be in > > any state (running/blocked/readytorun ...) when we > > want to do this. > > > > Any ideas/help greatly appreciated. > > > > Thanks, > > -- > > > > Vamsi Krishna S. > > Linux Technology Center, > > IBM Software Lab, Bangalore. > > Ph: +91 80 5262355 Extn: 3959 > > Internet: vamsi@in.ibm.com > > > ________________________________________________________________________ > Looking for a job? Visit Yahoo! India Careers > Visit http://in.careers.yahoo.com -- Vamsi Krishna S. Linux Technology Center, IBM Software Lab, Bangalore. Ph: +91 80 5262355 Extn: 3959 Internet: vamsi@in.ibm.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/
