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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 6404FC04EBA for ; Wed, 28 Nov 2018 03:04:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 385992086B for ; Wed, 28 Nov 2018 03:04:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 385992086B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=cn.fujitsu.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 S1727284AbeK1OEZ (ORCPT ); Wed, 28 Nov 2018 09:04:25 -0500 Received: from mail.cn.fujitsu.com ([183.91.158.132]:54216 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727229AbeK1OET (ORCPT ); Wed, 28 Nov 2018 09:04:19 -0500 X-IronPort-AV: E=Sophos;i="5.56,289,1539619200"; d="scan'208";a="48766256" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 28 Nov 2018 11:04:16 +0800 Received: from G08CNEXCHPEKD01.g08.fujitsu.local (unknown [10.167.33.80]) by cn.fujitsu.com (Postfix) with ESMTP id 0E1824B734A7 for ; Wed, 28 Nov 2018 11:04:16 +0800 (CST) Received: from localhost.localdomain (10.167.226.22) by G08CNEXCHPEKD01.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 28 Nov 2018 11:04:21 +0800 From: Su Yue To: CC: Subject: [RFC PATCH 15/17] btrfs: priority alloc: write bg->priority_groups_sem while waiting reservation Date: Wed, 28 Nov 2018 11:11:46 +0800 Message-ID: <20181128031148.357-16-suy.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181128031148.357-1-suy.fnst@cn.fujitsu.com> References: <20181128031148.357-1-suy.fnst@cn.fujitsu.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.167.226.22] X-yoursite-MailScanner-ID: 0E1824B734A7.ACF3D X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: suy.fnst@cn.fujitsu.com Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Since if use priority alloc, we should down/up_write() bg->priority_groups_sem. Signed-off-by: Su Yue --- fs/btrfs/extent-tree.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index f530a4344368..6627bbe56ad5 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -6425,6 +6425,8 @@ void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, btrfs_put_block_group(bg); } +static inline bool +is_priority_alloc_enabled(struct btrfs_fs_info *fs_info); void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg) { struct btrfs_space_info *space_info = bg->space_info; @@ -6433,7 +6435,11 @@ void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg) if (!(bg->flags & BTRFS_BLOCK_GROUP_DATA)) return; - + if (is_priority_alloc_enabled(bg->fs_info)) { + down_write(&bg->priority_tree->groups_sem); + up_write(&bg->priority_tree->groups_sem); + goto wait; + } /* * Our block group is read only but before we set it to read only, * some task might have had allocated an extent from it already, but it @@ -6446,7 +6452,7 @@ void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg) */ down_write(&space_info->groups_sem); up_write(&space_info->groups_sem); - +wait: wait_var_event(&bg->reservations, !atomic_read(&bg->reservations)); } -- 2.19.1