Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755030AbbDUO1o (ORCPT ); Tue, 21 Apr 2015 10:27:44 -0400 Received: from mx1.redhat.com ([209.132.183.28]:43335 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751751AbbDUO1n (ORCPT ); Tue, 21 Apr 2015 10:27:43 -0400 From: Vitaly Kuznetsov To: "K. Y. Srinivasan" Cc: Haiyang Zhang , devel@linuxdriverproject.org, linux-kernel@vger.kernel.org, Dexuan Cui Subject: [PATCH 0/6] Drivers: hv: vmbus: fair round robin algorithm for vmbus_get_outgoing_channel() Date: Tue, 21 Apr 2015 16:27:34 +0200 Message-Id: <1429626460-7947-1-git-send-email-vkuznets@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1805 Lines: 39 This series is a continuation of the "Drivers: hv: vmbus: Use a round-robin algorithm for picking the outgoing channel" work. It is supposed to bring two significant changes: 1) Subchannels for a channel are distributed evenly across all vcpus we have. Currently we try to distribute all channels (including subchannels) across all vcpus, this approach doesn't guarantee that the particular channel's subchannels will be distributed in the same way as we process all offer requests in some random order. (Patch 05) 2) Channel picking based on the current vcpu is dropped from vmbus_get_outgoing_channel() in favor of a fair round robin. (Patch 06) Patches 01 - 04 are cleanup/refactoring. It would be also possible to make the change the other way around: always pick the subchannel based on the current vcpu (and fallback to a round robin in case there is no subchannel for the current vcpu). Please let me know if you think it is preferable. Vitaly Kuznetsov (6): Drivers: hv: vmbus: unify calls to percpu_channel_enq() Drivers: hv: vmbus: briefly comment num_sc and next_oc Drivers: hv: vmbus: decrease num_sc on subchannel removal Drivers: hv: vmbus: move init_vp_index() call to vmbus_process_offer() Drivers: hv: vmbus: distribute subchannels among all vcpus Drivers: hv: vmbus: do a fair round robin when selecting an outgoing channel drivers/hv/channel_mgmt.c | 248 +++++++++++++++++++++++----------------------- include/linux/hyperv.h | 12 ++- 2 files changed, 135 insertions(+), 125 deletions(-) -- 1.9.3 -- 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/