From patchwork Fri Mar 14 07:42:46 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "fan.du" X-Patchwork-Id: 330220 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id E54E02C010D for ; Fri, 14 Mar 2014 18:42:45 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755569AbaCNHmm (ORCPT ); Fri, 14 Mar 2014 03:42:42 -0400 Received: from mail.windriver.com ([147.11.1.11]:57148 "EHLO mail.windriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755133AbaCNHml (ORCPT ); Fri, 14 Mar 2014 03:42:41 -0400 Received: from ALA-HCB.corp.ad.wrs.com (ala-hcb.corp.ad.wrs.com [147.11.189.41]) by mail.windriver.com (8.14.5/8.14.5) with ESMTP id s2E7gZPW017750 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Fri, 14 Mar 2014 00:42:35 -0700 (PDT) Received: from iamroot-OptiPlex-780.corp.ad.wrs.com (128.224.162.246) by ALA-HCB.corp.ad.wrs.com (147.11.189.41) with Microsoft SMTP Server id 14.3.169.1; Fri, 14 Mar 2014 00:42:35 -0700 From: Fan Du To: CC: , Subject: [PATCH net-next] flowcache: Tune per cpu flow cache shrink size Date: Fri, 14 Mar 2014 15:42:46 +0800 Message-ID: <1394782966-9792-1-git-send-email-fan.du@windriver.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org When per cpu flow cache entries count reaches over high_watermark, flow cache will be shrinked gently to around low_watermark, not brutally killing most of cached entries by left only two. Signed-off-by: Fan Du --- net/core/flow.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/core/flow.c b/net/core/flow.c index 31cfb365e0c6..e379cdcd699b 100644 --- a/net/core/flow.c +++ b/net/core/flow.c @@ -142,7 +142,7 @@ static void __flow_cache_shrink(struct flow_cache *fc, static void flow_cache_shrink(struct flow_cache *fc, struct flow_cache_percpu *fcp) { - int shrink_to = fc->low_watermark / flow_cache_hash_size(fc); + int shrink_to = fc->low_watermark; __flow_cache_shrink(fc, fcp, shrink_to); }