From patchwork Wed Feb 24 18:53:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bodo Stroesser X-Patchwork-Id: 387515 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, 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 6867AC433E6 for ; Wed, 24 Feb 2021 18:55:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 207D964F0B for ; Wed, 24 Feb 2021 18:55:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234498AbhBXSzf (ORCPT ); Wed, 24 Feb 2021 13:55:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56078 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235617AbhBXSyr (ORCPT ); Wed, 24 Feb 2021 13:54:47 -0500 Received: from mail-ed1-x52d.google.com (mail-ed1-x52d.google.com [IPv6:2a00:1450:4864:20::52d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EF367C06174A; Wed, 24 Feb 2021 10:54:01 -0800 (PST) Received: by mail-ed1-x52d.google.com with SMTP id v22so3824158edx.13; Wed, 24 Feb 2021 10:54:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=8PICk5tpw0y1zvTDynLhN5NoJV1yk+g6TjhaESxmI00=; b=L9frWbOKqfq0l+A5akS5xX0MZfe8OgxgeVrSpm0KzP0//kkvRPeXZUKoq8PyEKKeby S/Oe3+KmhquSJCvfAn7MnF4YxEhAm8/uTnegbCEeop83fkAooQQqXSPmrP0xpG76atJw EUOZERKo3fwpk+KMKoEAli+vyhFRz1A9ufhqcKv0k4iy8QZXZVHsdBqdx41LAgqiV5QO Du3+1g1TduewSPnwmDkP7mkewTzDVyQcIggDNBGahqEFRfZOLA8h/1KEHzwEODNoPbum MzdDfMdjHZ2MaH1GDwWiDekw71LOVlZm2Dp4jRVMFTvi7NMOXGMIpi/CGRGkxWByU8HK Bq5w== 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=8PICk5tpw0y1zvTDynLhN5NoJV1yk+g6TjhaESxmI00=; b=svjePY+QV3Zo3XcpJiOdu0pT8OQUVkZVemfGtS8n5L3hyk/yB8HvTv1MnEMXSfz1Wv lzs+GkuoO50jgusrgzBLnJD6sH75xPCQgKno9KT9jJgTac6zRr9xpjKxEuvQ/nIWtlOj FcZXQcFGMheQTvABgqdoFZCzKCrZjvWnL8PMW227B/dK7A6gnA5V1uf0VXaZjeTy0aA6 sDA3DQKvEJRf52SUKfXtuZCs9IBPqwUObdyUxQtshVEBLmm2oPMpoQ0SnAGnxpLewNwN i7i/BoDMFY3xSh/GfHNsEt1A2UnQWXZkGKxvIOFkCzN5u/m8UlfhumStlQf94qMcbev6 Oykg== X-Gm-Message-State: AOAM530+p4LijnZSEps+/3UaEi4rELIbfWpyYPlKLYMuHVKHerSQ681K hVPWo0z1NRRPRfuJAX2MkLylr3fKNYE= X-Google-Smtp-Source: ABdhPJxbqfIljt+3BfqyC+kglnnPKSicOOLyc8JociyNNkmjXLiDElcuxfTAnQi0V4b7RM1nU1ucpg== X-Received: by 2002:a50:ee16:: with SMTP id g22mr36368209eds.235.1614192840803; Wed, 24 Feb 2021 10:54:00 -0800 (PST) Received: from localhost (ipbcc11466.dynamic.kabel-deutschland.de. [188.193.20.102]) by smtp.gmail.com with ESMTPSA id cz28sm2111515edb.22.2021.02.24.10.54.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 24 Feb 2021 10:54:00 -0800 (PST) From: Bodo Stroesser To: linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, "Martin K. Petersen" , Matthew Wilcox Cc: Bodo Stroesser Subject: [PATCH 2/2] scsi: target: tcmu: Replace radix_tree with XArray Date: Wed, 24 Feb 2021 19:53:35 +0100 Message-Id: <20210224185335.13844-3-bostroesser@gmail.com> X-Mailer: git-send-email 2.12.3 In-Reply-To: <20210224185335.13844-1-bostroesser@gmail.com> References: <20210224185335.13844-1-bostroesser@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org An attempt from Matthew Wilcox to replace radix-tree usage by XArray in tcmu more than 1 year ago unfortunately got lost. I rebased that work on latest tcmu and tested it. Signed-off-by: Bodo Stroesser --- drivers/target/target_core_user.c | 34 ++++++++++++++++------------------ 1 file changed, 16 insertions(+), 18 deletions(-) diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index 1fbfb307d5e5..067e00e37673 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -14,7 +14,6 @@ #include #include #include -#include #include #include #include @@ -143,7 +142,7 @@ struct tcmu_dev { uint32_t dbi_max; uint32_t dbi_thresh; unsigned long *data_bitmap; - struct radix_tree_root data_blocks; + struct xarray data_blocks; struct xarray commands; @@ -500,13 +499,13 @@ static inline int tcmu_get_empty_block(struct tcmu_dev *udev, int prev_dbi, int *iov_cnt) { struct page *page; - int ret, dbi; + int dbi; dbi = find_first_zero_bit(udev->data_bitmap, udev->dbi_thresh); if (dbi == udev->dbi_thresh) return -1; - page = radix_tree_lookup(&udev->data_blocks, dbi); + page = xa_load(&udev->data_blocks, dbi); if (!page) { if (atomic_add_return(1, &global_db_count) > tcmu_global_max_blocks) @@ -517,8 +516,7 @@ static inline int tcmu_get_empty_block(struct tcmu_dev *udev, if (!page) goto err_alloc; - ret = radix_tree_insert(&udev->data_blocks, dbi, page); - if (ret) + if (xa_store(&udev->data_blocks, dbi, page, GFP_KERNEL)) goto err_insert; } @@ -557,7 +555,7 @@ static int tcmu_get_empty_blocks(struct tcmu_dev *udev, static inline struct page * tcmu_get_block_page(struct tcmu_dev *udev, uint32_t dbi) { - return radix_tree_lookup(&udev->data_blocks, dbi); + return xa_load(&udev->data_blocks, dbi); } static inline void tcmu_free_cmd(struct tcmu_cmd *tcmu_cmd) @@ -1561,7 +1559,7 @@ static struct se_device *tcmu_alloc_device(struct se_hba *hba, const char *name) timer_setup(&udev->qfull_timer, tcmu_qfull_timedout, 0); timer_setup(&udev->cmd_timer, tcmu_cmd_timedout, 0); - INIT_RADIX_TREE(&udev->data_blocks, GFP_KERNEL); + xa_init(&udev->data_blocks); return &udev->se_dev; } @@ -1585,19 +1583,19 @@ static int tcmu_check_and_free_pending_cmd(struct tcmu_cmd *cmd) return -EINVAL; } -static void tcmu_blocks_release(struct radix_tree_root *blocks, - int start, int end) +static void tcmu_blocks_release(struct xarray *blocks, unsigned long first, + unsigned long last) { - int i; + XA_STATE(xas, blocks, first); struct page *page; - for (i = start; i < end; i++) { - page = radix_tree_delete(blocks, i); - if (page) { - __free_page(page); - atomic_dec(&global_db_count); - } + xas_lock(&xas); + xas_for_each(&xas, page, last) { + xas_store(&xas, NULL); + __free_page(page); + atomic_dec(&global_db_count); } + xas_unlock(&xas); } static void tcmu_remove_all_queued_tmr(struct tcmu_dev *udev) @@ -2923,7 +2921,7 @@ static void find_free_blocks(void) unmap_mapping_range(udev->inode->i_mapping, off, 0, 1); /* Release the block pages */ - tcmu_blocks_release(&udev->data_blocks, start, end); + tcmu_blocks_release(&udev->data_blocks, start, end - 1); mutex_unlock(&udev->cmdr_lock); total_freed += end - start;