Hello, On Tue, Aug 13, 2013 at 12:35:12PM -0700, Andrew Morton wrote: > I don't know how lots-of-kmallocs compares with alloc_percpu() > performance-wise. If this is actually performance sensitive, the logical thing to do would be pre-allocating per-cpu buffers instead of depending on dynamic allocation. Do the invocations need to be stackable? > That being said, the `cpumask_var_t mask' which was added to > lru_add_drain_all() is unneeded - it's just a temporary storage which > can be eliminated by creating a schedule_on_each_cpu_cond() or whatever > which is passed a function pointer of type `bool (*call_needed)(int > cpu, void *data)'. I'd really like to avoid that. Decision callbacks tend to get abused quite often and it's rather sad to do that because cpumask cannot be prepared and passed around. Can't it just preallocate all necessary resources? Thanks. -- tejun -- 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>