Does this mean that when context switch occurs, the kernel always stores the FPU registers and status even though the particular process does not do any floating point operation?
see the link http://mail.nl.linux.org/kernelnewbies/2004-09/msg00401.html
But how does it relate to the "We should not use Floating -point operation in Kernel? Is it is simply a design issue to have much performance or we cannot do at all floating point operation in kernel itself?
I think, if u want to use FPU inside the kernel, then u need to manually save and restore the FPU state before each operation. If u r using a pre-emptive kernel, the u need to disable pre-emption before doing this. i found the following link from google. i hope it'll be helpful. http://ozlabs.org/pipermail/linuxppc-embedded/2005-May/018302.html jinesh. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
