From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shirley Ma Subject: [RFC PATCH 0/1] sched: Add a new API to find the prefer idlest cpu Date: Sun, 22 Jul 2012 23:57:14 -0700 Message-ID: <1343026634.13461.15.camel@oc3660625478.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: "Michael S. Tsirkin" , vivek@us.ibm.com, sri@us.ibm.com To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Introduce a new API to choose per-cpu thread from cgroup control cpuset (allowed) and preferred cpuset (local numa-node). The receiving cpus of a networking device are not under cgroup controls. When such a networking device uses per-cpu thread model, the cpu which is chose to process the packets might not be part of cgroup cpusets without this API. On numa system, the preferred cpusets would help to reduce expensive cross memory access to/from the other node. Signed-off-by: Shirley Ma --- include/linux/sched.h | 2 ++ kernel/sched/fair.c | 30 ++++++++++++++++++++++++++++++ 2 files changed, 32 insertions(+), 0 deletions(-) Thanks Shirley