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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F0FBC433FE for ; Wed, 19 Oct 2022 23:07:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231660AbiJSXHQ (ORCPT ); Wed, 19 Oct 2022 19:07:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52250 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231657AbiJSXHD (ORCPT ); Wed, 19 Oct 2022 19:07:03 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2AFD31D79A4; Wed, 19 Oct 2022 16:06:55 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 0199D619E8; Wed, 19 Oct 2022 23:06:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50D67C433D6; Wed, 19 Oct 2022 23:06:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1666220813; bh=nhWd5t1o5IYPMyRDspKfa8k81cG6AqyRMnxC35RByvA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RTNpHs0Kg89gp+DdaWbqIhMe6f+kqN2itBUWt/vxK1bmJLo0PHxG6RNvRK7zgDRDg iv9jweLMM77bQDKPOxd/z35JK8AyJMK1+An+SeGVWhrEZ/3yxMU+9Lzj7BK+CGDReP h8T4236dujOUvBiPUHEPWIQ0S9Y1WAcgd8XNfnoAEOz69C1MQTTS7pE184xyY1Z8JT HT2e/rXya5jMDMFJNSaagJBkeubUGYeGtqsm17ykLhlAzbwYJQoQAh2kEt1pE9OZuB IF8yOC9obDZc+rFgO7DNESbRVyszsLsT7h8/dkJGZA0tj2JIP02i/29o47H0nNoOdK 8LlCm9PYq4b0g== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 01C055C0890; Wed, 19 Oct 2022 16:06:53 -0700 (PDT) From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, kernel-team@fb.com, mingo@kernel.org Cc: stern@rowland.harvard.edu, parri.andrea@gmail.com, will@kernel.org, peterz@infradead.org, boqun.feng@gmail.com, npiggin@gmail.com, dhowells@redhat.com, j.alglave@ucl.ac.uk, luc.maranget@inria.fr, akiyks@gmail.com, SeongJae Park , Yunjae Lee , "Paul E . McKenney" Subject: [PATCH memory-model 3/5] docs/memory-barriers.txt/kokr: introduce io_stop_wc() and add implementation for ARM64 Date: Wed, 19 Oct 2022 16:06:49 -0700 Message-Id: <20221019230651.2502538-3-paulmck@kernel.org> X-Mailer: git-send-email 2.31.1.189.g2e36527f23 In-Reply-To: <20221019230640.GA2502305@paulmck-ThinkPad-P17-Gen-1> References: <20221019230640.GA2502305@paulmck-ThinkPad-P17-Gen-1> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: SeongJae Park Translate this commit to Korean: d5624bb29f49 ("asm-generic: introduce io_stop_wc() and add implementation for ARM64") Signed-off-by: SeongJae Park Reviewed-by: Yunjae Lee Signed-off-by: Paul E. McKenney --- Documentation/translations/ko_KR/memory-barriers.txt | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/translations/ko_KR/memory-barriers.txt b/Documentation/translations/ko_KR/memory-barriers.txt index 75aa5531cc7d0..96b4162989a0d 100644 --- a/Documentation/translations/ko_KR/memory-barriers.txt +++ b/Documentation/translations/ko_KR/memory-barriers.txt @@ -1918,6 +1918,14 @@ Mandatory 배리어들은 SMP 시스템에서도 UP 시스템에서도 SMP 효 Persistent memory 에서의 로드를 위해선 현재의 읽기 메모리 배리어로도 읽기 순서를 보장하는데 충분합니다. + (*) io_stop_wc(); + + 쓰기와 결합된 특성을 갖는 메모리 액세스의 경우 (예: ioremap_wc() 에 의해 + 리턴되는 것들), CPU 는 앞의 액세스들이 뒤따르는 것들과 병합되게끔 기다릴 + 수 있습니다. io_stop_wc() 는 그런 기다림이 성능에 영향을 끼칠 수 있을 때, + 이 매크로 앞의 쓰기-결합된 메모리 액세스들이 매크로 뒤의 것들과 병합되는 + 것을 방지하기 위해 사용될 수 있습니다. + ========================= 암묵적 커널 메모리 배리어 ========================= -- 2.31.1.189.g2e36527f23