For adding system calls, does the kernel have to be recompiled? I am relatively new to this, so if someone could guide me on how exactly to add a new system call, it would be very helpful. However, for my purposes, I really do not want to recompile the kernel. So if this is required in order to add a system call, could someone suggest some other way of moving data from kernel to user space? Thanks Krishna --- Jonathan Bartlett <johnnyb@xxxxxxxxxx> wrote: > > What is the best way to go about doing this? > > > > The module will be collecting huge amounts of > data. So > > I guess it would be best if the user app keeps > > querying the module for data in a periodic > fashion. > > Once the task is done the user mode app can remove > the > > module. > > Maybe a better way would be for the module to > install a syscall or similar > entry, and the userspace program could provide a > buffer to store the data > in. Then, kernel space wouldn't have to worry about > masses of data, and > just use copy_to_user() to transfer the data into > the given buffer. > > When the program wants to finish gathering data, > they just call another > system call, and maybe have another system call for > changing buffers. You > might also have a signal that is delivered when the > buffer needs changing. > > Jon > ---- > Learn to program using Linux assembly language > http://www.cafeshops.com/bartlettpublish.8640017 > > > _______________________________________________ > Redhat-devel-list mailing list > Redhat-devel-list@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/redhat-devel-list > __________________________________ Do you Yahoo!? Take Yahoo! Mail with you! Get it on your mobile phone. http://mobile.yahoo.com/maildemo _______________________________________________ Redhat-devel-list mailing list Redhat-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/redhat-devel-list
