From patchwork Mon Jan 28 21:24:32 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dennis Zhou X-Patchwork-Id: 10784823 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5BEC613B4 for ; Mon, 28 Jan 2019 21:25:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4B58E2B279 for ; Mon, 28 Jan 2019 21:25:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3F8782B288; Mon, 28 Jan 2019 21:25:40 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AFDD02B279 for ; Mon, 28 Jan 2019 21:25:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728515AbfA1VZd (ORCPT ); Mon, 28 Jan 2019 16:25:33 -0500 Received: from mail-yw1-f68.google.com ([209.85.161.68]:46082 "EHLO mail-yw1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728329AbfA1VYy (ORCPT ); Mon, 28 Jan 2019 16:24:54 -0500 Received: by mail-yw1-f68.google.com with SMTP id t13so7329678ywe.13; Mon, 28 Jan 2019 13:24:53 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=LjkQC3v3bDQeODs64cW3hycjplTBkfWbIT2+EqSQ+uc=; b=tONn/PICYMbK2k5JNfZdvCPZjdaV/bh9prVdNubhwIVwgzUgK8h3JUzC5UURIuoTb/ IGRKZ7EA9HvetkNdcmzGNVCagipReuMC4mBWEw9yJc5bqW4QkFhj7h3fiiGgKK89MUQ+ rX9obWjcrbrMGJ1eqe5p5xwcMhAslo+R7RhpY6IW0Y8WIuUVMmQU6oqixBz8OvvPlusE uwu0c8sm7gnBA1WESb2wrrm6Pfokh+7ImI0Lc1OEHxOuLLAvnLA+qAFeEZpKZqVNkP8b PM1dcRD5uOATRuZnpiuSmLULA66ngkvABvkZPxapiKWmZYbkokLBJv7fidY2eyUiMJMk Cg5A== X-Gm-Message-State: AJcUukdvQmi+mLYDlUtaD92a6c+YodVkSd9TC/BImkUKp7tv/MginoEe ubwTvv4oNqKlXrtqZ71nDFg= X-Google-Smtp-Source: ALg8bN4krUaaFh3/FYbayZmTR5wPbx/Lm0BpztA0iqE4JGNhILMBbLMdeQY1QlfnL0vFXwT+C2wt0g== X-Received: by 2002:a81:b61a:: with SMTP id u26mr22289727ywh.250.1548710693154; Mon, 28 Jan 2019 13:24:53 -0800 (PST) Received: from dennisz-mbp.thefacebook.com ([199.201.65.135]) by smtp.gmail.com with ESMTPSA id a7sm24170415ywb.18.2019.01.28.13.24.51 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 28 Jan 2019 13:24:52 -0800 (PST) From: Dennis Zhou To: David Sterba , Josef Bacik , Chris Mason , Omar Sandoval , Nick Terrell Cc: kernel-team@fb.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, Dennis Zhou Subject: [PATCH 06/11] btrfs: add compression interface in (get/put)_workspace() Date: Mon, 28 Jan 2019 16:24:32 -0500 Message-Id: <20190128212437.11597-7-dennis@kernel.org> X-Mailer: git-send-email 2.13.5 In-Reply-To: <20190128212437.11597-1-dennis@kernel.org> References: <20190128212437.11597-1-dennis@kernel.org> Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP There are two levels of workspace management. First, alloc()/free() which are responsible for actually creating and destroy workspaces. Second, at a higher level, get()/put() which is the compression code asking for a workspace from a workspace_manager. The compression code shouldn't really care how it gets a workspace, but that it got a workspace. This adds get_workspace() and put_workspace() to be the higher level interface which is responsible for indexing into the appropriate compression type. It also introduces btrfs_put_workspace() and btrfs_get_workspace() to be the generic implementations of the higher interface. Signed-off-by: Dennis Zhou Reviewed-by: Josef Bacik --- fs/btrfs/compression.c | 57 +++++++++++++++++++++++++----------------- 1 file changed, 34 insertions(+), 23 deletions(-) diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index 63fa3eaeeacc..2e748d8785f0 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -841,7 +841,7 @@ static void btrfs_cleanup_workspace_manager(struct workspace_manager *wsman) * Preallocation makes a forward progress guarantees and we do not return * errors. */ -static struct list_head *find_workspace(int type) +static struct list_head *btrfs_get_workspace(struct workspace_manager *wsman) { struct list_head *workspace; int cpus = num_online_cpus(); @@ -852,11 +852,11 @@ static struct list_head *find_workspace(int type) wait_queue_head_t *ws_wait; int *free_ws; - idle_ws = &wsm[type].idle_ws; - ws_lock = &wsm[type].ws_lock; - total_ws = &wsm[type].total_ws; - ws_wait = &wsm[type].ws_wait; - free_ws = &wsm[type].free_ws; + idle_ws = &wsman->idle_ws; + ws_lock = &wsman->ws_lock; + total_ws = &wsman->total_ws; + ws_wait = &wsman->ws_wait; + free_ws = &wsman->free_ws; again: spin_lock(ws_lock); @@ -887,7 +887,7 @@ static struct list_head *find_workspace(int type) * context of btrfs_compress_bio/btrfs_compress_pages */ nofs_flag = memalloc_nofs_save(); - workspace = wsm[type].ops->alloc_workspace(); + workspace = wsman->ops->alloc_workspace(); memalloc_nofs_restore(nofs_flag); if (IS_ERR(workspace)) { @@ -918,11 +918,17 @@ static struct list_head *find_workspace(int type) return workspace; } +static struct list_head *get_workspace(int type) +{ + return btrfs_get_workspace(&wsm[type]); +} + /* * put a workspace struct back on the list or free it if we have enough * idle ones sitting around */ -static void free_workspace(int type, struct list_head *workspace) +static void btrfs_put_workspace(struct workspace_manager *wsman, + struct list_head *ws) { struct list_head *idle_ws; spinlock_t *ws_lock; @@ -930,27 +936,32 @@ static void free_workspace(int type, struct list_head *workspace) wait_queue_head_t *ws_wait; int *free_ws; - idle_ws = &wsm[type].idle_ws; - ws_lock = &wsm[type].ws_lock; - total_ws = &wsm[type].total_ws; - ws_wait = &wsm[type].ws_wait; - free_ws = &wsm[type].free_ws; + idle_ws = &wsman->idle_ws; + ws_lock = &wsman->ws_lock; + total_ws = &wsman->total_ws; + ws_wait = &wsman->ws_wait; + free_ws = &wsman->free_ws; spin_lock(ws_lock); if (*free_ws <= num_online_cpus()) { - list_add(workspace, idle_ws); + list_add(ws, idle_ws); (*free_ws)++; spin_unlock(ws_lock); goto wake; } spin_unlock(ws_lock); - wsm[type].ops->free_workspace(workspace); + wsman->ops->free_workspace(ws); atomic_dec(total_ws); wake: cond_wake_up(ws_wait); } +static void put_workspace(int type, struct list_head *ws) +{ + return btrfs_put_workspace(&wsm[type], ws); +} + /* * Given an address space and start and length, compress the bytes into @pages * that are allocated on demand. @@ -984,14 +995,14 @@ int btrfs_compress_pages(unsigned int type_level, struct address_space *mapping, struct list_head *workspace; int ret; - workspace = find_workspace(type); + workspace = get_workspace(type); btrfs_compress_op[type]->set_level(workspace, type_level); ret = btrfs_compress_op[type]->compress_pages(workspace, mapping, start, pages, out_pages, total_in, total_out); - free_workspace(type, workspace); + put_workspace(type, workspace); return ret; } @@ -1015,9 +1026,9 @@ static int btrfs_decompress_bio(struct compressed_bio *cb) int ret; int type = cb->compress_type; - workspace = find_workspace(type); + workspace = get_workspace(type); ret = btrfs_compress_op[type]->decompress_bio(workspace, cb); - free_workspace(type, workspace); + put_workspace(type, workspace); return ret; } @@ -1033,13 +1044,13 @@ int btrfs_decompress(int type, unsigned char *data_in, struct page *dest_page, struct list_head *workspace; int ret; - workspace = find_workspace(type); + workspace = get_workspace(type); ret = btrfs_compress_op[type]->decompress(workspace, data_in, dest_page, start_byte, srclen, destlen); - free_workspace(type, workspace); + put_workspace(type, workspace); return ret; } @@ -1467,7 +1478,7 @@ static void heuristic_collect_sample(struct inode *inode, u64 start, u64 end, */ int btrfs_compress_heuristic(struct inode *inode, u64 start, u64 end) { - struct list_head *ws_list = find_workspace(0); + struct list_head *ws_list = get_workspace(0); struct heuristic_ws *ws; u32 i; u8 byte; @@ -1536,7 +1547,7 @@ int btrfs_compress_heuristic(struct inode *inode, u64 start, u64 end) } out: - free_workspace(0, ws_list); + put_workspace(0, ws_list); return ret; }