From: Robert Love <rml@tech9.net> To: linux-kernel@vger.kernel.org Subject: [PATCH] updated 2.4 O(1) scheduler patches Date: 22 Apr 2002 14:48:02 -0400 An updated version of Ingo Molnar's multiqueue O(1) scheduler is available at: http://www.kernel.org/pub/linux/kernel/people/rml/sched for kernels 2.4.18 and 2.4.19-pre7. This patch has the following changes over Ingo's -K3 release and what is in Alan's -ac tree: - remove wake_up_sync and friends, we don't need them now - abstract away access to need_resched - load_balance optimizations and cleanup - fix scheduler deadlock on some platforms - sched_yield optimizations and cleanup - better use of MAX_RT_PRIO define instead of magic numbers - misc. code cleanups - misc. fixes and optimizations and most importantly: - backport the migration_thread and associated code to 2.4 and also the following changes since my initial patch: - include linux/interrupt.h in sched.c - use yield() where needed The migration_thread code allows arch-independent `pushing' of tasks from one CPU to another. This allows the implementation of a reliable set_cpus_allowed method for use in the kernel as well as things like task cpu affinity interfaces. The migration_thread code used in this patch is actually newer than what is in 2.5.8 - it contains the interrupt-off fix pointed out by Erich Focht and William Lee Irwin's new migration_init code. This is not suggested for inclusion in mainline 2.4. 2.4 != 2.5. Enjoy, Robert Love - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/