Tejun Heo <tj@xxxxxxxxxx> writes: > Hello, Jens. > > On Thu, Dec 06, 2012 at 07:19:34PM +0100, Jens Axboe wrote: >> We need to expose it. Once the binding is set from the kernel side on a >> kernel thread, it can't be modified. > > That's only if kthread_bind() is used. Caling set_cpus_allowed_ptr() > doesn't set PF_THREAD_BOUND and userland can adjust affinity like any > other tasks. > >> Binding either for performance reasons or for ensuring that we >> explicitly don't run in some places is a very useful feature. > > Sure, but I think this is too specific. Something more generic would > be much better. It can be as simple as generating a uevent. I'm in favor of a more general approach. For now, I'm still going to push a patch that at least binds to the proper numa node. I'll post that after I've tested it. Cheers, Jeff -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>