From patchwork Sat Feb 19 10:58:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Byungchul Park X-Patchwork-Id: 12752246 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id B59AAC4321E for ; Sat, 19 Feb 2022 10:59:21 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D2B3A8D0001; Sat, 19 Feb 2022 05:58:48 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C9C0D8D0003; Sat, 19 Feb 2022 05:58:48 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9F9FD8D0001; Sat, 19 Feb 2022 05:58:48 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.28]) by kanga.kvack.org (Postfix) with ESMTP id 49EC06B0092 for ; Sat, 19 Feb 2022 05:58:48 -0500 (EST) Received: from smtpin01.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 1E76B2074A for ; Sat, 19 Feb 2022 10:58:48 +0000 (UTC) X-FDA: 79159231536.01.D970466 Received: from lgeamrelo11.lge.com (lgeamrelo13.lge.com [156.147.23.53]) by imf21.hostedemail.com (Postfix) with ESMTP id 02DB91C000B for ; Sat, 19 Feb 2022 10:58:46 +0000 (UTC) Received: from unknown (HELO lgemrelse7q.lge.com) (156.147.1.151) by 156.147.23.53 with ESMTP; 19 Feb 2022 19:58:45 +0900 X-Original-SENDERIP: 156.147.1.151 X-Original-MAILFROM: byungchul.park@lge.com Received: from unknown (HELO localhost.localdomain) (10.177.244.38) by 156.147.1.151 with ESMTP; 19 Feb 2022 19:58:45 +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 v2 18/18] dept: Distinguish each work from another Date: Sat, 19 Feb 2022 19:58:31 +0900 Message-Id: <1645268311-24222-19-git-send-email-byungchul.park@lge.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1645268311-24222-1-git-send-email-byungchul.park@lge.com> References: <1645268311-24222-1-git-send-email-byungchul.park@lge.com> Authentication-Results: imf21.hostedemail.com; dkim=none; spf=pass (imf21.hostedemail.com: domain of byungchul.park@lge.com designates 156.147.23.53 as permitted sender) smtp.mailfrom=byungchul.park@lge.com; dmarc=none X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 02DB91C000B X-Stat-Signature: sjb7ekz5crjk1o9hy7k8jc5ggfnu6tqg X-HE-Tag: 1645268326-127703 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 c369a8e..ee3faa2 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);