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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 8D67AC433DF for ; Tue, 23 Jun 2020 00:30:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 622932076A for ; Tue, 23 Jun 2020 00:30:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592872216; bh=aN1NgEvLJWwek4oA/17xzB8fUK3W9nCdyXsLPv1nRqM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=2cHzV2eUfhEn+tKbrGTET/yepabgHIxaFOZwSAcTNEZOERsFVE6b5utYbwGvzOxDN adMRw42qF1+zpYLwLafO/Cj/6jr2X3NcBB62LJ0wLR8fvqMB+EtmgMtJEPzdgk9GIn RfnrzrHIQDIENTse7cV6uzL0487q+l0CkvYnXGY8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731619AbgFWAaQ (ORCPT ); Mon, 22 Jun 2020 20:30:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:55084 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731222AbgFWAaP (ORCPT ); Mon, 22 Jun 2020 20:30:15 -0400 Received: from paulmck-ThinkPad-P72.home (50-39-105-78.bvtn.or.frontiernet.net [50.39.105.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3FA15204EC; Tue, 23 Jun 2020 00:30:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592872215; bh=aN1NgEvLJWwek4oA/17xzB8fUK3W9nCdyXsLPv1nRqM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EmhObBc7tBHn9ElGasTidcvMd9n2iGHPEHpbwflwbpyZ+oD7+40aXml3fqRmQD1nP o62vdlZOX6ZtDaQRT8KJoGKrle5Z/H20IIkk5EWwvpzBoQm3qMy1Ol1If7mkfC/cll /W+C7Nzf1Bxt4ZcIGJegaSXUnqE7J/fHKLiXzJiU= From: paulmck@kernel.org To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com, mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org, "Paul E . McKenney" Subject: [PATCH tip/core/rcu 01/30] rcuperf: Remove useless while loops around wait_event Date: Mon, 22 Jun 2020 17:29:44 -0700 Message-Id: <20200623003013.26252-1-paulmck@kernel.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20200623002941.GA26089@paulmck-ThinkPad-P72> References: <20200623002941.GA26089@paulmck-ThinkPad-P72> Sender: rcu-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org From: "Joel Fernandes (Google)" wait_event() already retries if the condition for the wake up is not satisifed after wake up. Remove them from the rcuperf test. Signed-off-by: Joel Fernandes (Google) Signed-off-by: Paul E. McKenney --- kernel/rcu/rcuperf.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c index 16dd1e6..246da8f 100644 --- a/kernel/rcu/rcuperf.c +++ b/kernel/rcu/rcuperf.c @@ -576,11 +576,8 @@ static int compute_real(int n) static int rcu_perf_shutdown(void *arg) { - do { - wait_event(shutdown_wq, - atomic_read(&n_rcu_perf_writer_finished) >= - nrealwriters); - } while (atomic_read(&n_rcu_perf_writer_finished) < nrealwriters); + wait_event(shutdown_wq, + atomic_read(&n_rcu_perf_writer_finished) >= nrealwriters); smp_mb(); /* Wake before output. */ rcu_perf_cleanup(); kernel_power_off(); @@ -693,11 +690,8 @@ kfree_perf_cleanup(void) static int kfree_perf_shutdown(void *arg) { - do { - wait_event(shutdown_wq, - atomic_read(&n_kfree_perf_thread_ended) >= - kfree_nrealthreads); - } while (atomic_read(&n_kfree_perf_thread_ended) < kfree_nrealthreads); + wait_event(shutdown_wq, + atomic_read(&n_kfree_perf_thread_ended) >= kfree_nrealthreads); smp_mb(); /* Wake before output. */ -- 2.9.5