Hi, Thanks a lot for your help. The reason why I want to do this is, due to hardware limitations of the card about 70% of CPU time will be lost in data transfer. I have to some how keep it running with 48 pppds, RAS, Call management software, arq & crc for incoming data etc in the rest of the 30% of time. So I want to start them (ppp, arq & crc) only when the data comes in. (Currently I am running arq & crc --proprietary to the local hardware vendor-- in the driver itself). Thanks, S B Sarin(ee98291). On Mon, 14 Apr 2003, Seth Arnold wrote: > On Tue, Apr 15, 2003 at 09:17:55AM +0530, Suseelan B Sarin wrote: > > When it is 48 calls, I wants to start them only when the data for > > that cahnnel starts comming to my card (I can find when it comes in). > > Now I want to start a pppd for that channel from kernel. Can > > someone help me? Any links?... > > I cannot fathom why you would want to start the ppp connections from > within the kernel. It does not sound like a good idea to me. In fact, > as a user, I would be extremely skeptical of any driver starting ppp > processes from the kernel. > > That said, if you're sure you want to do this, and you're positive it is > the only way to solve your problem, look at call_usermodehelper(). There > are restrictions on its use. > > Check out the source as well as Linux Device Drivers, 2nd Edition. kmod is > the number-one user of call_usermodehelper(), so it would be worthwhile to > read its implementation in kernel/kmod.c. (Particularly the 2.4 version > _after_ the ptrace patch. :) > > Of course, kmod.c is evidently entirely different in the 2.5 series of > kernels, which might provide a better example to learn from. > > Cheers > > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
