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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,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 6D84CC18DF5 for ; Tue, 20 Nov 2018 12:51:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 41A1A20831 for ; Tue, 20 Nov 2018 12:51:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 41A1A20831 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-btrfs-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728157AbeKTXUR (ORCPT ); Tue, 20 Nov 2018 18:20:17 -0500 Received: from mx2.suse.de ([195.135.220.15]:44652 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727836AbeKTXUR (ORCPT ); Tue, 20 Nov 2018 18:20:17 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 97A20AF95 for ; Tue, 20 Nov 2018 12:51:17 +0000 (UTC) Received: by ds.suse.cz (Postfix, from userid 10065) id 6C0FCDA78B; Tue, 20 Nov 2018 13:50:56 +0100 (CET) From: David Sterba To: linux-btrfs@vger.kernel.org Cc: David Sterba Subject: [PATCH 0/4] Replace custom device-replace locking with rwsem Date: Tue, 20 Nov 2018 13:50:54 +0100 Message-Id: X-Mailer: git-send-email 2.19.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org The first cleanup part went to 4.19, the actual switch from the custom locking to rswem was postponed as I found performance degradation. This turned out to be related to VM cache settings, so I'm resending the series again. The custom locking is based on rwlock protected reader/writer counters, waitqueues, which essentially is what the readwrite semaphore does. Previous patchset: https://lore.kernel.org/linux-btrfs/cover.1536331604.git.dsterba@suse.com/ Patches correspond to 8/11-11/11 and there's no change besides refreshing on top of current misc-next. David Sterba (4): btrfs: reada: reorder dev-replace locks before radix tree preload btrfs: dev-replace: swich locking to rw semaphore btrfs: dev-replace: remove custom read/write blocking scheme btrfs: dev-replace: open code trivial locking helpers fs/btrfs/ctree.h | 4 +- fs/btrfs/dev-replace.c | 97 ++++++++++++++---------------------------- fs/btrfs/dev-replace.h | 5 --- fs/btrfs/disk-io.c | 4 +- fs/btrfs/reada.c | 16 ++++--- fs/btrfs/scrub.c | 15 ++++--- fs/btrfs/volumes.c | 27 ++++++------ 7 files changed, 63 insertions(+), 105 deletions(-) -- 2.19.1