From patchwork Thu Feb 17 10:57:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Byungchul Park X-Patchwork-Id: 12749818 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D979EC433F5 for ; Thu, 17 Feb 2022 10:58:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239552AbiBQK6v (ORCPT ); Thu, 17 Feb 2022 05:58:51 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:35882 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239563AbiBQK6o (ORCPT ); Thu, 17 Feb 2022 05:58:44 -0500 Received: from lgeamrelo11.lge.com (lgeamrelo12.lge.com [156.147.23.52]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 6D9262A4A0E for ; Thu, 17 Feb 2022 02:58:01 -0800 (PST) Received: from unknown (HELO lgeamrelo01.lge.com) (156.147.1.125) by 156.147.23.52 with ESMTP; 17 Feb 2022 19:58:00 +0900 X-Original-SENDERIP: 156.147.1.125 X-Original-MAILFROM: byungchul.park@lge.com Received: from unknown (HELO localhost.localdomain) (10.177.244.38) by 156.147.1.125 with ESMTP; 17 Feb 2022 19:58:00 +0900 X-Original-SENDERIP: 10.177.244.38 X-Original-MAILFROM: byungchul.park@lge.com From: Byungchul Park To: torvalds@linux-foundation.org Cc: damien.lemoal@opensource.wdc.com, linux-ide@vger.kernel.org, adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, mingo@redhat.com, linux-kernel@vger.kernel.org, peterz@infradead.org, will@kernel.org, tglx@linutronix.de, rostedt@goodmis.org, joel@joelfernandes.org, sashal@kernel.org, daniel.vetter@ffwll.ch, chris@chris-wilson.co.uk, duyuyang@gmail.com, johannes.berg@intel.com, tj@kernel.org, tytso@mit.edu, willy@infradead.org, david@fromorbit.com, amir73il@gmail.com, bfields@fieldses.org, gregkh@linuxfoundation.org, kernel-team@lge.com, linux-mm@kvack.org, akpm@linux-foundation.org, mhocko@kernel.org, minchan@kernel.org, hannes@cmpxchg.org, vdavydov.dev@gmail.com, sj@kernel.org, jglisse@redhat.com, dennis@kernel.org, cl@linux.com, penberg@kernel.org, rientjes@google.com, vbabka@suse.cz, ngupta@vflare.org, linux-block@vger.kernel.org, axboe@kernel.dk, paolo.valente@linaro.org, josef@toxicpanda.com, linux-fsdevel@vger.kernel.org, viro@zeniv.linux.org.uk, jack@suse.cz, jack@suse.com, jlayton@kernel.org, dan.j.williams@intel.com, hch@infradead.org, djwong@kernel.org, dri-devel@lists.freedesktop.org, airlied@linux.ie, rodrigosiqueiramelo@gmail.com, melissa.srw@gmail.com, hamohammed.sa@gmail.com Subject: [PATCH 13/16] dept: Apply SDT to swait Date: Thu, 17 Feb 2022 19:57:49 +0900 Message-Id: <1645095472-26530-14-git-send-email-byungchul.park@lge.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1645095472-26530-1-git-send-email-byungchul.park@lge.com> References: <1645095472-26530-1-git-send-email-byungchul.park@lge.com> Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Makes SDT able to track dependencies by swait. Signed-off-by: Byungchul Park --- include/linux/swait.h | 4 ++++ kernel/sched/swait.c | 10 ++++++++++ 2 files changed, 14 insertions(+) diff --git a/include/linux/swait.h b/include/linux/swait.h index 6a8c22b..dbdf2ce 100644 --- a/include/linux/swait.h +++ b/include/linux/swait.h @@ -6,6 +6,7 @@ #include #include #include +#include #include /* @@ -43,6 +44,7 @@ struct swait_queue_head { raw_spinlock_t lock; struct list_head task_list; + struct dept_map dmap; }; struct swait_queue { @@ -61,6 +63,7 @@ struct swait_queue { #define __SWAIT_QUEUE_HEAD_INITIALIZER(name) { \ .lock = __RAW_SPIN_LOCK_UNLOCKED(name.lock), \ .task_list = LIST_HEAD_INIT((name).task_list), \ + .dmap = DEPT_SDT_MAP_INIT(name), \ } #define DECLARE_SWAIT_QUEUE_HEAD(name) \ @@ -72,6 +75,7 @@ extern void __init_swait_queue_head(struct swait_queue_head *q, const char *name #define init_swait_queue_head(q) \ do { \ static struct lock_class_key __key; \ + sdt_map_init(&(q)->dmap); \ __init_swait_queue_head((q), #q, &__key); \ } while (0) diff --git a/kernel/sched/swait.c b/kernel/sched/swait.c index e1c655f..4ca7d6e 100644 --- a/kernel/sched/swait.c +++ b/kernel/sched/swait.c @@ -27,6 +27,7 @@ void swake_up_locked(struct swait_queue_head *q) return; curr = list_first_entry(&q->task_list, typeof(*curr), task_list); + sdt_event(&q->dmap); wake_up_process(curr->task); list_del_init(&curr->task_list); } @@ -69,6 +70,7 @@ void swake_up_all(struct swait_queue_head *q) while (!list_empty(&tmp)) { curr = list_first_entry(&tmp, typeof(*curr), task_list); + sdt_event(&q->dmap); wake_up_state(curr->task, TASK_NORMAL); list_del_init(&curr->task_list); @@ -97,6 +99,9 @@ void prepare_to_swait_exclusive(struct swait_queue_head *q, struct swait_queue * __prepare_to_swait(q, wait); set_current_state(state); raw_spin_unlock_irqrestore(&q->lock, flags); + + if (state & TASK_NORMAL) + sdt_wait_prepare(&q->dmap); } EXPORT_SYMBOL(prepare_to_swait_exclusive); @@ -119,12 +124,16 @@ long prepare_to_swait_event(struct swait_queue_head *q, struct swait_queue *wait } raw_spin_unlock_irqrestore(&q->lock, flags); + if (!ret && state & TASK_NORMAL) + sdt_wait_prepare(&q->dmap); + return ret; } EXPORT_SYMBOL(prepare_to_swait_event); void __finish_swait(struct swait_queue_head *q, struct swait_queue *wait) { + sdt_wait_finish(); __set_current_state(TASK_RUNNING); if (!list_empty(&wait->task_list)) list_del_init(&wait->task_list); @@ -134,6 +143,7 @@ void finish_swait(struct swait_queue_head *q, struct swait_queue *wait) { unsigned long flags; + sdt_wait_finish(); __set_current_state(TASK_RUNNING); if (!list_empty_careful(&wait->task_list)) {