From patchwork Fri Mar 4 07:06:37 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Byungchul Park X-Patchwork-Id: 12768648 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 38F5DC433F5 for ; Fri, 4 Mar 2022 07:07:56 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1CF6F10F2BD; Fri, 4 Mar 2022 07:07:26 +0000 (UTC) Received: from lgeamrelo11.lge.com (lgeamrelo13.lge.com [156.147.23.53]) by gabe.freedesktop.org (Postfix) with ESMTP id 77B8410F50F for ; Fri, 4 Mar 2022 07:07:09 +0000 (UTC) Received: from unknown (HELO lgemrelse6q.lge.com) (156.147.1.121) by 156.147.23.53 with ESMTP; 4 Mar 2022 16:07:08 +0900 X-Original-SENDERIP: 156.147.1.121 X-Original-MAILFROM: byungchul.park@lge.com Received: from unknown (HELO localhost.localdomain) (10.177.244.38) by 156.147.1.121 with ESMTP; 4 Mar 2022 16:07:08 +0900 X-Original-SENDERIP: 10.177.244.38 X-Original-MAILFROM: byungchul.park@lge.com From: Byungchul Park To: torvalds@linux-foundation.org Subject: [PATCH v4 18/24] dept: Distinguish each work from another Date: Fri, 4 Mar 2022 16:06:37 +0900 Message-Id: <1646377603-19730-19-git-send-email-byungchul.park@lge.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1646377603-19730-1-git-send-email-byungchul.park@lge.com> References: <1646377603-19730-1-git-send-email-byungchul.park@lge.com> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: hamohammed.sa@gmail.com, jack@suse.cz, peterz@infradead.org, daniel.vetter@ffwll.ch, amir73il@gmail.com, david@fromorbit.com, dri-devel@lists.freedesktop.org, chris@chris-wilson.co.uk, bfields@fieldses.org, linux-ide@vger.kernel.org, adilger.kernel@dilger.ca, joel@joelfernandes.org, cl@linux.com, will@kernel.org, duyuyang@gmail.com, sashal@kernel.org, paolo.valente@linaro.org, damien.lemoal@opensource.wdc.com, willy@infradead.org, hch@infradead.org, airlied@linux.ie, mingo@redhat.com, djwong@kernel.org, vdavydov.dev@gmail.com, rientjes@google.com, dennis@kernel.org, linux-ext4@vger.kernel.org, linux-mm@kvack.org, ngupta@vflare.org, johannes.berg@intel.com, jack@suse.com, dan.j.williams@intel.com, josef@toxicpanda.com, rostedt@goodmis.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, jglisse@redhat.com, viro@zeniv.linux.org.uk, tglx@linutronix.de, mhocko@kernel.org, vbabka@suse.cz, melissa.srw@gmail.com, sj@kernel.org, tytso@mit.edu, rodrigosiqueiramelo@gmail.com, kernel-team@lge.com, gregkh@linuxfoundation.org, jlayton@kernel.org, linux-kernel@vger.kernel.org, penberg@kernel.org, minchan@kernel.org, hannes@cmpxchg.org, tj@kernel.org, akpm@linux-foundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Workqueue already provides concurrency control. By that, any wait in a work doesn't prevents events in other works with the control enabled. Thus, each work would better be considered a different context. So let Dept assign a different context id to each work. Signed-off-by: Byungchul Park --- include/linux/dept.h | 2 ++ kernel/dependency/dept.c | 10 ++++++++++ kernel/workqueue.c | 3 +++ 3 files changed, 15 insertions(+) diff --git a/include/linux/dept.h b/include/linux/dept.h index 1a1c307..55c5ed5 100644 --- a/include/linux/dept.h +++ b/include/linux/dept.h @@ -486,6 +486,7 @@ struct dept_task { extern void dept_event_split_map(struct dept_map_each *me, struct dept_map_common *mc, unsigned long ip, const char *e_fn); extern void dept_ask_event_split_map(struct dept_map_each *me, struct dept_map_common *mc); extern void dept_kernel_enter(void); +extern void dept_work_enter(void); /* * for users who want to manage external keys @@ -527,6 +528,7 @@ struct dept_task { #define dept_event_split_map(me, mc, ip, e_fn) do { } while (0) #define dept_ask_event_split_map(me, mc) do { } while (0) #define dept_kernel_enter() do { } while (0) +#define dept_work_enter() do { } while (0) #define dept_key_init(k) do { (void)(k); } while (0) #define dept_key_destroy(k) do { (void)(k); } while (0) #endif diff --git a/kernel/dependency/dept.c b/kernel/dependency/dept.c index 8f962ae..5d4efc3 100644 --- a/kernel/dependency/dept.c +++ b/kernel/dependency/dept.c @@ -1873,6 +1873,16 @@ void dept_disable_hardirq(unsigned long ip) dept_exit(flags); } +/* + * Assign a different context id to each work. + */ +void dept_work_enter(void) +{ + struct dept_task *dt = dept_task(); + + dt->cxt_id[DEPT_CXT_PROCESS] += (1UL << DEPT_CXTS_NR); +} + void dept_kernel_enter(void) { struct dept_task *dt = dept_task(); diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 33f1106..f5d762c 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -51,6 +51,7 @@ #include #include #include +#include #include "workqueue_internal.h" @@ -2217,6 +2218,8 @@ static void process_one_work(struct worker *worker, struct work_struct *work) lockdep_copy_map(&lockdep_map, &work->lockdep_map); #endif + dept_work_enter(); + /* ensure we're on the correct CPU */ WARN_ON_ONCE(!(pool->flags & POOL_DISASSOCIATED) && raw_smp_processor_id() != pool->cpu);