From patchwork Thu Feb 27 21:07:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Simmons X-Patchwork-Id: 11409663 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A05ED138D for ; Thu, 27 Feb 2020 21:18:45 +0000 (UTC) Received: from pdx1-mailman02.dreamhost.com (pdx1-mailman02.dreamhost.com [64.90.62.194]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 89031246A1 for ; Thu, 27 Feb 2020 21:18:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 89031246A1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lustre-devel-bounces@lists.lustre.org Received: from pdx1-mailman02.dreamhost.com (localhost [IPv6:::1]) by pdx1-mailman02.dreamhost.com (Postfix) with ESMTP id C9CAF21FB18; Thu, 27 Feb 2020 13:18:39 -0800 (PST) X-Original-To: lustre-devel@lists.lustre.org Delivered-To: lustre-devel-lustre.org@pdx1-mailman02.dreamhost.com Received: from smtp3.ccs.ornl.gov (smtp3.ccs.ornl.gov [160.91.203.39]) by pdx1-mailman02.dreamhost.com (Postfix) with ESMTP id E5B3C21FA4E for ; Thu, 27 Feb 2020 13:18:17 -0800 (PST) Received: from star.ccs.ornl.gov (star.ccs.ornl.gov [160.91.202.134]) by smtp3.ccs.ornl.gov (Postfix) with ESMTP id 4B3CE6D1; Thu, 27 Feb 2020 16:18:13 -0500 (EST) Received: by star.ccs.ornl.gov (Postfix, from userid 2004) id 4825D46C; Thu, 27 Feb 2020 16:18:13 -0500 (EST) From: James Simmons To: Andreas Dilger , Oleg Drokin , NeilBrown Date: Thu, 27 Feb 2020 16:07:58 -0500 Message-Id: <1582838290-17243-11-git-send-email-jsimmons@infradead.org> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1582838290-17243-1-git-send-email-jsimmons@infradead.org> References: <1582838290-17243-1-git-send-email-jsimmons@infradead.org> Subject: [lustre-devel] [PATCH 010/622] lustre: llite: increase whole-file readahead to RPC size X-BeenThere: lustre-devel@lists.lustre.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "For discussing Lustre software development." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Lustre Development List MIME-Version: 1.0 Errors-To: lustre-devel-bounces@lists.lustre.org Sender: "lustre-devel" From: Andreas Dilger Increase the default whole-file readahead limit to match the current RPC size. That ensures that files smaller than the RPC size will be read in a single round-trip instead of sending multiple smaller RPCs. WC-bug-id: https://jira.whamcloud.com/browse/LU-7990 Lustre-commit: 627d0133d9d7 ("LU-7990 llite: increase whole-file readahead to RPC size") Signed-off-by: Andreas Dilger Reviewed-on: https://review.whamcloud.com/26955 Reviewed-by: Patrick Farrell Reviewed-by: Dmitry Eremin Reviewed-by: Oleg Drokin Signed-off-by: James Simmons --- fs/lustre/llite/llite_lib.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/lustre/llite/llite_lib.c b/fs/lustre/llite/llite_lib.c index aaa8ad2..12aafe0 100644 --- a/fs/lustre/llite/llite_lib.c +++ b/fs/lustre/llite/llite_lib.c @@ -465,6 +465,12 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt) sbi->ll_dt_exp->exp_connect_data = *data; + /* Don't change value if it was specified in the config log */ + if (sbi->ll_ra_info.ra_max_read_ahead_whole_pages == -1) + sbi->ll_ra_info.ra_max_read_ahead_whole_pages = + max_t(unsigned long, SBI_DEFAULT_READAHEAD_WHOLE_MAX, + (data->ocd_brw_size >> PAGE_SHIFT)); + err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp, LUSTRE_SEQ_METADATA); if (err) {