From patchwork Mon Nov 12 09:56:29 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Valente X-Patchwork-Id: 10678401 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 C788714BA for ; Mon, 12 Nov 2018 09:57:31 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B75F429F60 for ; Mon, 12 Nov 2018 09:57:31 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AB42329F62; Mon, 12 Nov 2018 09:57:31 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 1FDCD29F60 for ; Mon, 12 Nov 2018 09:57:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729150AbeKLTt5 (ORCPT ); Mon, 12 Nov 2018 14:49:57 -0500 Received: from mail-wm1-f68.google.com ([209.85.128.68]:52861 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729339AbeKLTtz (ORCPT ); Mon, 12 Nov 2018 14:49:55 -0500 Received: by mail-wm1-f68.google.com with SMTP id r11-v6so7788524wmb.2 for ; Mon, 12 Nov 2018 01:57:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=0oaKQg1Db4rRhO3WCbNaQdRbhtsjokz1BpBDDqQDnH0=; b=Rg5OfuRnIxfiEqH0WAirw+p5zFFM2A3eP+/qNVgYtz/p1XWMtJQwYM05UW/C4+j5gX IaZnE3XI6wvJCXcd4FQ1Hx5aghznqX87ea65MY8LBS1tfU6fXt06wlGlTPcLKrs9JP1t 5iM+S+o9ye6yz2LV6kWJfSIofPFST2APQ3GVM= 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=0oaKQg1Db4rRhO3WCbNaQdRbhtsjokz1BpBDDqQDnH0=; b=ifRIlJq+yue1jgvvzIPwFk3ROKJcbsHSZc6nMJ8ZT9LTNHrrOG4jijaqkPE8jdc389 6Ih+oSV6yUNrkLWYuKJm5lvuvf2u7t7UA8jwTHJ4kg+LuUsC2/ZLlB5lONL7pjJaBlLv SPVkwBbZo6RdBGHt691lEE1s8PUAW9IfyYxKe826nQ+o0GTQvhg7ze3miOSPD63vU9MI G8eH8K5yd8WBhOb2QZHOIFwIt59UFo7yUAElPRaWdTc4WqM7gXCvrJ3LUIt5RfhXZVph yDy+VC80NQKuoKlq6tSjk6Vippa+frK1/G+fWcQqUm0SO53SbMfnhZAqHSXRrWZwp0Ps WG1w== X-Gm-Message-State: AGRZ1gK+IlJ45aXlcGtTKnok6J7D8SKwdqaCj9rp+cyUPDIPVdP0DZkB sfbTmVNedT0mT3M0ljG+STqW1w== X-Google-Smtp-Source: AJdET5dc+MYjthZUBqOb8v1Uac6VYFwMsLxCFBwUwclICSmMMWw45pmt4ZJKD8ArEZEhDeAuhckI4w== X-Received: by 2002:a7b:c84f:: with SMTP id c15-v6mr6284511wml.79.1542016645423; Mon, 12 Nov 2018 01:57:25 -0800 (PST) Received: from localhost.localdomain ([93.68.220.21]) by smtp.gmail.com with ESMTPSA id r14-v6sm21273089wro.8.2018.11.12.01.57.22 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 12 Nov 2018 01:57:24 -0800 (PST) From: Paolo Valente To: Jens Axboe , Greg Kroah-Hartman , Tejun Heo , Li Zefan , Angelo Ruocco , Dennis Zhou , Josef Bacik , Liu Bo , Bart Van Assche , Johannes Weiner Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, ulf.hansson@linaro.org, linus.walleij@linaro.org, broonie@kernel.org, bfq-iosched@googlegroups.com, oleksandr@natalenko.name, cgroups@vger.kernel.org, linux-doc@vger.kernel.org, Jonathan Corbet , Paolo Valente Subject: [PATCH 09/12] block, bfq: use standard file names for the proportional-share policy Date: Mon, 12 Nov 2018 10:56:29 +0100 Message-Id: <20181112095632.69114-10-paolo.valente@linaro.org> X-Mailer: git-send-email 2.16.1 In-Reply-To: <20181112095632.69114-1-paolo.valente@linaro.org> References: <20181112095632.69114-1-paolo.valente@linaro.org> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Some of the files exposed in a cgroup by bfq, for the proportional share policy, have the same meaning as the files owned by cfq. The old implementation of the cgroup interface didn't allow different entities to create cgroup files with the same name (in the same subsystem). So, for bfq, we had to add the prefix "bfq" to the names of its cgroup files. This commit renames the cgroup files of the bfq scheduler as those exposed by cfq, and makes bfq share these files with any other policy. Signed-off-by: Angelo Ruocco Signed-off-by: Paolo Valente --- block/bfq-cgroup.c | 94 +++++++++++++++++++++++++++++++++++++++--------------- 1 file changed, 69 insertions(+), 25 deletions(-) diff --git a/block/bfq-cgroup.c b/block/bfq-cgroup.c index 50b2d7ba6b9d..9148fc38c737 100644 --- a/block/bfq-cgroup.c +++ b/block/bfq-cgroup.c @@ -1055,50 +1055,67 @@ struct blkcg_policy blkcg_policy_bfq = { struct cftype bfq_blkcg_legacy_files[] = { { - .name = "bfq.weight", - .flags = CFTYPE_NOT_ON_ROOT, + .name = "weight", + .owner_name = "bfq", + .flags = CFTYPE_NOT_ON_ROOT | CFTYPE_SHARES_FILE, .seq_show = bfq_io_show_weight, .write_u64 = bfq_io_set_weight_legacy, }, /* statistics, covers only the tasks in the bfqg */ { - .name = "bfq.io_service_bytes", + .name = "io_service_bytes", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = (unsigned long)&blkcg_policy_bfq, .seq_show_cft = blkg_print_stat_bytes, }, { - .name = "bfq.io_serviced", + .name = "io_serviced", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = (unsigned long)&blkcg_policy_bfq, .seq_show_cft = blkg_print_stat_ios, }, #ifdef CONFIG_DEBUG_BLK_CGROUP { - .name = "bfq.time", + .name = "time", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = offsetof(struct bfq_group, stats.time), .seq_show_cft = bfqg_print_stat, }, { - .name = "bfq.sectors", + .name = "sectors", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .seq_show = bfqg_print_stat_sectors, }, { - .name = "bfq.io_service_time", + .name = "io_service_time", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = offsetof(struct bfq_group, stats.service_time), .seq_show_cft = bfqg_print_rwstat, }, { - .name = "bfq.io_wait_time", + .name = "io_wait_time", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = offsetof(struct bfq_group, stats.wait_time), .seq_show_cft = bfqg_print_rwstat, }, { - .name = "bfq.io_merged", + .name = "io_merged", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = offsetof(struct bfq_group, stats.merged), .seq_show_cft = bfqg_print_rwstat, }, { - .name = "bfq.io_queued", + .name = "io_queued", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = offsetof(struct bfq_group, stats.queued), .seq_show_cft = bfqg_print_rwstat, }, @@ -1106,66 +1123,92 @@ struct cftype bfq_blkcg_legacy_files[] = { /* the same statictics which cover the bfqg and its descendants */ { - .name = "bfq.io_service_bytes_recursive", + .name = "io_service_bytes_recursive", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = (unsigned long)&blkcg_policy_bfq, .seq_show_cft = blkg_print_stat_bytes_recursive, }, { - .name = "bfq.io_serviced_recursive", + .name = "io_serviced_recursive", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = (unsigned long)&blkcg_policy_bfq, .seq_show_cft = blkg_print_stat_ios_recursive, }, #ifdef CONFIG_DEBUG_BLK_CGROUP { - .name = "bfq.time_recursive", + .name = "time_recursive", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = offsetof(struct bfq_group, stats.time), .seq_show_cft = bfqg_print_stat_recursive, }, { - .name = "bfq.sectors_recursive", + .name = "sectors_recursive", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .seq_show = bfqg_print_stat_sectors_recursive, }, { - .name = "bfq.io_service_time_recursive", + .name = "io_service_time_recursive", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = offsetof(struct bfq_group, stats.service_time), .seq_show_cft = bfqg_print_rwstat_recursive, }, { - .name = "bfq.io_wait_time_recursive", + .name = "io_wait_time_recursive", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = offsetof(struct bfq_group, stats.wait_time), .seq_show_cft = bfqg_print_rwstat_recursive, }, { - .name = "bfq.io_merged_recursive", + .name = "io_merged_recursive", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = offsetof(struct bfq_group, stats.merged), .seq_show_cft = bfqg_print_rwstat_recursive, }, { - .name = "bfq.io_queued_recursive", + .name = "io_queued_recursive", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = offsetof(struct bfq_group, stats.queued), .seq_show_cft = bfqg_print_rwstat_recursive, }, { - .name = "bfq.avg_queue_size", + .name = "avg_queue_size", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .seq_show = bfqg_print_avg_queue_size, }, { - .name = "bfq.group_wait_time", + .name = "group_wait_time", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = offsetof(struct bfq_group, stats.group_wait_time), .seq_show_cft = bfqg_print_stat, }, { - .name = "bfq.idle_time", + .name = "idle_time", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = offsetof(struct bfq_group, stats.idle_time), .seq_show_cft = bfqg_print_stat, }, { - .name = "bfq.empty_time", + .name = "empty_time", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = offsetof(struct bfq_group, stats.empty_time), .seq_show_cft = bfqg_print_stat, }, { - .name = "bfq.dequeue", + .name = "dequeue", + .owner_name = "bfq", + .flags = CFTYPE_SHARES_FILE, .private = offsetof(struct bfq_group, stats.dequeue), .seq_show_cft = bfqg_print_stat, }, @@ -1175,8 +1218,9 @@ struct cftype bfq_blkcg_legacy_files[] = { struct cftype bfq_blkg_files[] = { { - .name = "bfq.weight", - .flags = CFTYPE_NOT_ON_ROOT, + .name = "weight", + .owner_name = "bfq", + .flags = CFTYPE_NOT_ON_ROOT | CFTYPE_SHARES_FILE, .seq_show = bfq_io_show_weight, .write = bfq_io_set_weight, },