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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 E1CECECDFB3 for ; Tue, 17 Jul 2018 09:27:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 89FA82086E for ; Tue, 17 Jul 2018 09:27:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 89FA82086E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=zytor.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730249AbeGQJ7X (ORCPT ); Tue, 17 Jul 2018 05:59:23 -0400 Received: from terminus.zytor.com ([198.137.202.136]:45827 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729036AbeGQJ7W (ORCPT ); Tue, 17 Jul 2018 05:59:22 -0400 Received: from terminus.zytor.com (localhost [127.0.0.1]) by terminus.zytor.com (8.15.2/8.15.2) with ESMTPS id w6H9RIpt1462189 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Tue, 17 Jul 2018 02:27:18 -0700 Received: (from tipbot@localhost) by terminus.zytor.com (8.15.2/8.15.2/Submit) id w6H9RHIs1462186; Tue, 17 Jul 2018 02:27:17 -0700 Date: Tue, 17 Jul 2018 02:27:17 -0700 X-Authentication-Warning: terminus.zytor.com: tipbot set sender to tipbot@zytor.com using -f From: tip-bot for SeongJae Park Message-ID: Cc: sj38.park@gmail.com, linux-kernel@vger.kernel.org, paulmck@linux.vnet.ibm.com, mingo@kernel.org, peterz@infradead.org, hpa@zytor.com, torvalds@linux-foundation.org, byungchul.park@lge.com, tglx@linutronix.de Reply-To: tglx@linutronix.de, byungchul.park@lge.com, torvalds@linux-foundation.org, peterz@infradead.org, mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, sj38.park@gmail.com, paulmck@linux.vnet.ibm.com In-Reply-To: <20180716180605.16115-4-paulmck@linux.vnet.ibm.com> References: <20180716180605.16115-4-paulmck@linux.vnet.ibm.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:locking/core] locking/memory-barriers.txt/kokr: Update Korean translation to fix broken DMA vs. MMIO ordering example Git-Commit-ID: 68ec3444b32158541f4bbd47ed9345634c56399d X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 68ec3444b32158541f4bbd47ed9345634c56399d Gitweb: https://git.kernel.org/tip/68ec3444b32158541f4bbd47ed9345634c56399d Author: SeongJae Park AuthorDate: Mon, 16 Jul 2018 11:05:55 -0700 Committer: Ingo Molnar CommitDate: Tue, 17 Jul 2018 09:29:33 +0200 locking/memory-barriers.txt/kokr: Update Korean translation to fix broken DMA vs. MMIO ordering example Translate this commit to Korean: 5846581e3563 ("locking/memory-barriers.txt: Fix broken DMA vs. MMIO ordering example") [ paulmck: Updated based on feedback from Byungchul Park. ] Signed-off-by: SeongJae Park Signed-off-by: Paul E. McKenney Acked-by: Byungchul Park Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: akiyks@gmail.com Cc: boqun.feng@gmail.com Cc: dhowells@redhat.com Cc: j.alglave@ucl.ac.uk Cc: linux-arch@vger.kernel.org Cc: luc.maranget@inria.fr Cc: npiggin@gmail.com Cc: parri.andrea@gmail.com Cc: stern@rowland.harvard.edu Cc: will.deacon@arm.com Link: http://lkml.kernel.org/r/20180716180605.16115-4-paulmck@linux.vnet.ibm.com Signed-off-by: Ingo Molnar --- .../translations/ko_KR/memory-barriers.txt | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/Documentation/translations/ko_KR/memory-barriers.txt b/Documentation/translations/ko_KR/memory-barriers.txt index 921739d00f69..7f01fb1c1084 100644 --- a/Documentation/translations/ko_KR/memory-barriers.txt +++ b/Documentation/translations/ko_KR/memory-barriers.txt @@ -1891,22 +1891,22 @@ Mandatory 배리어들은 SMP 시스템에서도 UP 시스템에서도 SMP 효 /* 소유권을 수정 */ desc->status = DEVICE_OWN; - /* MMIO 를 통해 디바이스에 공지를 하기 전에 메모리를 동기화 */ - wmb(); - /* 업데이트된 디스크립터의 디바이스에 공지 */ writel(DESC_NOTIFY, doorbell); } dma_rmb() 는 디스크립터로부터 데이터를 읽어오기 전에 디바이스가 소유권을 - 내놓았음을 보장하게 하고, dma_wmb() 는 디바이스가 자신이 소유권을 다시 - 가졌음을 보기 전에 디스크립터에 데이터가 쓰였음을 보장합니다. wmb() 는 - 캐시 일관성이 없는 (cache incoherent) MMIO 영역에 쓰기를 시도하기 전에 - 캐시 일관성이 있는 메모리 (cache coherent memory) 쓰기가 완료되었음을 - 보장해주기 위해 필요합니다. - - consistent memory 에 대한 자세한 내용을 위해선 Documentation/DMA-API.txt - 문서를 참고하세요. + 내려놓았을 것을 보장하고, dma_wmb() 는 디바이스가 자신이 소유권을 다시 + 가졌음을 보기 전에 디스크립터에 데이터가 쓰였을 것을 보장합니다. 참고로, + writel() 을 사용하면 캐시 일관성이 있는 메모리 (cache coherent memory) + 쓰기가 MMIO 영역에의 쓰기 전에 완료되었을 것을 보장하므로 writel() 앞에 + wmb() 를 실행할 필요가 없음을 알아두시기 바랍니다. writel() 보다 비용이 + 저렴한 writel_relaxed() 는 이런 보장을 제공하지 않으므로 여기선 사용되지 + 않아야 합니다. + + writel_relaxed() 와 같은 완화된 I/O 접근자들에 대한 자세한 내용을 위해서는 + "커널 I/O 배리어의 효과" 섹션을, consistent memory 에 대한 자세한 내용을 + 위해선 Documentation/DMA-API.txt 문서를 참고하세요. MMIO 쓰기 배리어