Hi Rajasekhar, On Thu, Mar 29, 2012 at 11:00 PM, Rajasekhar Pulluru <pullururajasekhar@xxxxxxxxx> wrote: > Hi, > > I would like to know how per-cpu data are stored internally? > And how are they protected from other cores? I believe that they're just kmalloc'd like other kernel data. At the kernel level there is no protection, just like all the rest of the memory accessible to the kernel. http://lxr.linux.no/#linux+v3.3/include/asm-generic/percpu.h#L8 http://lxr.linux.no/#linux+v3.3/mm/percpu.c When you declare a per-cpu variable, it goes into a special section, and what you're really doing is figuring out the offset within a per_cpu region of memory. -- Dave Hylands Shuswap, BC, Canada http://www.davehylands.com _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
