Hi :) On Wed, Feb 16, 2011 at 12:59, Rajat Jain <rajatjain@xxxxxxxxxxx> wrote: > Hello loody, > >> 1. in kernel/trace, I always see "__read_mostly" at the end of >> parameter is that a compiler optimization parameter? > > Yes, it is a hint to the compiler that the parameter is mostly read, thus if the compiler has to make a decision between optimizing one of the read / write paths, it will optimize the read path even at the expense of write path. To be precise, they will be grouped into same cache line as much as possible. By doing so, those cache line won't be invalidated so often (keeping them "hot" :) hehehhe ) -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
