Hi, Bhanu Kalyan Chetlapalli wrote:
Its not pre-emptive. But I think some ppl (esp those who use linux for real-time tasks) put patches to make it preemptive.
Actually, Linux 2.6 is preemptive, and this is one of the major improvment over 2.4. See http://lwn.net/Articles/22912/ for more information.
However, the kernel is not fully preemptive: there are some portions of code during which preemption is disabled (using preempt_disable() and preempt_enable()), and real-time people are trying to get rid of these portions of code (or at least reduce them), in order to get the lowest possible latencies.
I hope I didn't say any mistake. Thomas -- Thomas Petazzoni thomas.petazzoni@xxxxxxxx -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
