(12/9/2013 12:58 PM), Frederic Weisbecker wrote: > Now that we removed dead thread posix cpu timers caching, > lets remove the dead process wide version. This caching > is similar to the per thread version but it should be even > more rare: > > * If the process id dead, we are not reading its timers > status from a thread belonging to its group since they > are all dead. So this caching only concern remote process > timers reads. Now posix cpu timers using itimers or timer_settime() > can't do remote process timers anyway so it's not even clear if there > is actually a user for this caching. > > * Unlike per thread timers caching, this only applies to > zombies targets. Buried targets' process wide timers return > 0 values. But then again, timer_gettime() can't read remote > process timers, so if the process is dead, there can't be > any reader left anyway. > > Then again this caching seem to complicate the code for > corner cases that are probably not worth it. So lets get > rid of it. > > Also remove the sample snapshot on dying process timer > that is now useless, as suggested by Kosaki. > > Signed-off-by: Frederic Weisbecker <[email protected]> > Cc: Thomas Gleixner <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: Peter Zijlstra <[email protected]> > Cc: Oleg Nesterov <[email protected]> > Cc: Kosaki Motohiro <[email protected]> > Cc: Andrew Morton <[email protected]>
Looks good to me. Acked-by: KOSAKI Motohiro <[email protected]> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
