From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 59DC1C2D0B1 for ; Fri, 7 Feb 2020 06:58:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2B32421741 for ; Fri, 7 Feb 2020 06:58:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726465AbgBGG6n convert rfc822-to-8bit (ORCPT ); Fri, 7 Feb 2020 01:58:43 -0500 Received: from mail.kernel.org ([198.145.29.99]:37238 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726130AbgBGG6n (ORCPT ); Fri, 7 Feb 2020 01:58:43 -0500 From: bugzilla-daemon@bugzilla.kernel.org To: kvm@vger.kernel.org Subject: [Bug 206447] New: __skb_get_hash_symmetric makes tun queue not balance Date: Fri, 07 Feb 2020 06:58:42 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: AssignedTo virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Product: Virtualization X-Bugzilla-Component: kvm X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: glovejmm@163.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version cf_kernel_version rep_platform op_sys cf_tree bug_status bug_severity priority component assigned_to reporter cf_regression Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=206447 Bug ID: 206447 Summary: __skb_get_hash_symmetric makes tun queue not balance Product: Virtualization Version: unspecified Kernel Version: 3.10.0-862.14 and later Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: kvm Assignee: virtualization_kvm@kernel-bugs.osdl.org Reporter: glovejmm@163.com Regression: No We use tun ko to creaste a vm with ovs, We found thst tun_select_queue changed the hash method from skb_get_hash to __skb_get_hash_symmetric, in higher kernel version. What refuse us is it is quite balance in tun queue select in old version, while it is often focus on 1-2 queues in new version with above change. When we rollback the hash methd to skb_get_hash with kernel recompile , balance recover normal again . Is there any config or patch relation with this hash not balance problem? here is the change patch https://patchwork.ozlabs.org/patch/643209 -- You are receiving this mail because: You are watching the assignee of the bug.