From patchwork Sun Jan 25 00:18:46 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Trond Myklebust X-Patchwork-Id: 5700491 Return-Path: X-Original-To: patchwork-linux-nfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 3B7CB9F305 for ; Sun, 25 Jan 2015 00:18:53 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 622B9201F2 for ; Sun, 25 Jan 2015 00:18:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 881E6201EF for ; Sun, 25 Jan 2015 00:18:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752094AbbAYASu (ORCPT ); Sat, 24 Jan 2015 19:18:50 -0500 Received: from mail-ig0-f181.google.com ([209.85.213.181]:55553 "EHLO mail-ig0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750959AbbAYASu (ORCPT ); Sat, 24 Jan 2015 19:18:50 -0500 Received: by mail-ig0-f181.google.com with SMTP id hn18so3209380igb.2 for ; Sat, 24 Jan 2015 16:18:49 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:subject:date:message-id; bh=G6QpebT7LWX3q0N3/boA+sp2Hl55VVkQwSpPQbh+CVY=; b=N8CAjmJP/HuuVhEu4aZEGnsIyXkdLwiSy3gLTRmhDt40WMU41gq/MIlpZWLeaVtelY 7HXi+2bZ57i294qnBc3e9LiG7BINNqfK5fcKe34zEjsAkNC2wQ/p/4KXsSZEDrneu+Pw x/ASlyr2zqR/I5XrMtGiG+KTnLMsdfy8JEi0BhCMWTT6qCiXVPDvkS0IRH5TwPNj04xM THQ4kUVMXxOPp9q2Rr33SMH/33AvBP27s8MtGuvC55ADyPOMKBfPixgrzqv42CPtrJ0y fDHJeBYjitYVvZS2nuuxBP1ZWubMn2AVE4IUFjWq0nSDu/yZnRbnFfOaHV3bsyvHhJci PXPw== X-Gm-Message-State: ALoCoQkZemap6P+AZFB5Md5w7Oa2tCR4dqSISkm5DErEwlowY1R9vHhYK9dwZlYn1sEToRxsbo+f X-Received: by 10.42.89.203 with SMTP id h11mr14639152icm.57.1422145129624; Sat, 24 Jan 2015 16:18:49 -0800 (PST) Received: from leira.trondhjem.org.localdomain (c-68-40-185-14.hsd1.mi.comcast.net. [68.40.185.14]) by mx.google.com with ESMTPSA id qs3sm3284407igb.8.2015.01.24.16.18.48 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 24 Jan 2015 16:18:49 -0800 (PST) From: Trond Myklebust To: linux-nfs@vger.kernel.org Subject: [PATCH 1/2] SUNRPC: Adjust rpciod workqueue parameters Date: Sat, 24 Jan 2015 19:18:46 -0500 Message-Id: <1422145127-81838-1-git-send-email-trond.myklebust@primarydata.com> X-Mailer: git-send-email 2.1.0 Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Increase the concurrency level for rpciod threads to allow for allocations etc that happen in the RPCSEC_GSS layer. Also note that the NFSv4 byte range locks may now need to allocate memory from inside rpciod. Add the WQ_HIGHPRI flag to improve latency guarantees while we're at it. Signed-off-by: Trond Myklebust --- net/sunrpc/sched.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c index d20f2329eea3..4f65ec28d2b4 100644 --- a/net/sunrpc/sched.c +++ b/net/sunrpc/sched.c @@ -1069,7 +1069,8 @@ static int rpciod_start(void) * Create the rpciod thread and wait for it to start. */ dprintk("RPC: creating workqueue rpciod\n"); - wq = alloc_workqueue("rpciod", WQ_MEM_RECLAIM, 1); + /* Note: highpri because network receive is latency sensitive */ + wq = alloc_workqueue("rpciod", WQ_MEM_RECLAIM | WQ_HIGHPRI, 0); rpciod_workqueue = wq; return rpciod_workqueue != NULL; }