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 1D540C4332F for ; Sat, 8 Oct 2022 17:50:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230464AbiJHRuD (ORCPT ); Sat, 8 Oct 2022 13:50:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46196 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230421AbiJHRtz (ORCPT ); Sat, 8 Oct 2022 13:49:55 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B49DC1B9F7; Sat, 8 Oct 2022 10:49:54 -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 ams.source.kernel.org (Postfix) with ESMTPS id 22F39B80B9D; Sat, 8 Oct 2022 17:49:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B2F6AC4347C; Sat, 8 Oct 2022 17:49:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1665251391; bh=FMeXNJfI0IoqbHMQGj/sXCrRP6kNujAnRvsPJGkuog0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HKP8dPbRUUzUHnIbZzcnldygWmOoQrcsorn98a9fZc+gqodYR81BY8ZX9S9SdQ04o f+/4Itpj2UMW+vJy4KPDKx063ahiT6dIbG6Atqz80GDHRBdmLfbku4grxydqUo0z/W AiSTdeDczlM7b3FJ6DeJ9NsQCFGokqzRfbzjLRtiCWxB25DTZvfnkB3WQ6okYTvcwr pVQDd0Ugc4LIY5zkSkvaV1F74XY+bjFp9UZ1dW9+tRL3ot80xzbkBBFJagjzvsYHCK FgFh/cCP0+Cl4p0s/xPklAQFo++xVvxgMJ4Q8sbxxWErmcQlolu/o6kXthcWAfg3+e jWeqlvGAJW4Vw== From: SeongJae Park To: paulmck@kernel.org, corbet@lwn.net Cc: linux-doc@vger.kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, SeongJae Park Subject: [PATCH 2/4] docs/memory-barriers.txt/kokr: introduce io_stop_wc() and add implementation for ARM64 Date: Sat, 8 Oct 2022 10:49:26 -0700 Message-Id: <20221008174928.13479-3-sj@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20221008174928.13479-1-sj@kernel.org> References: <20221008174928.13479-1-sj@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Translate this commit to Korean: d5624bb29f49 ("asm-generic: introduce io_stop_wc() and add implementation for ARM64") Signed-off-by: SeongJae Park --- 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 75aa5531cc7d..1c811b96e8e0 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 액세스가 그 뒤의 것들과 병합되는 것을 + 방지하기 위해 사용될 수 있습니다. + ========================= 암묵적 커널 메모리 배리어 ========================= -- 2.17.1