On 4/17/06, Jan Hudec <bulb@xxxxxx> wrote: > On Sun, Apr 16, 2006 at 12:38:52 +0200, tyler@xxxxxxxx wrote: > > On Sun, Apr 16, 2006 at 04:56:12PM +0800, Min-Hua Chen wrote: > > > hi: <snip> > No bug, really. The comparison is INTEGERAL (there is no other in C, right) > and preempt_count actually IS a COUNT, saying how many times preemption > disable was requested. We are in atomic, if it was not requested, or it was > requested by BKL (ie. kernel_locked() == 1 && preempt_count() == 1). hm... I still have difficulty in understanding. Does it mean that if the value of preempt_count (say X) is because of X number of lock_kernel requests, it is preemptible? Another question is, why the value of PREEMPT_ACTIVE is 0x10000000 in i386? It seems to be different in different architectures Regards, Om -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
