* Tejun Heo <tj@xxxxxxxxxx> wrote: > Hello, > > 11/27/2009 01:52 PM, Ingo Molnar wrote: > > Btw., longer term it will be faster than a mask check and a > > default-untaken conditional: there's ongoign work to offer runtime > > instruction patching features for tracing callbacks. There's the > > jump patching optimization and also the immediate values patching > > optimization. > > Scheduler callbacks won't benefit much from it. There will always be > workqueues and thus conditional branch will always be necessary. Other code will benefit from it though, such as the page fault callbacks i already mentioned. My position on this is rather clear: i want no new callbacks and no changes to callbacks in the scheduler until this situation is cleaned up. Five callback sites are _way_ too much - so if you want to add callbacks or change them, please clean it up and improve it first. Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
