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27 Jan 2023 10:19:42 +0900 X-Original-SENDERIP: 10.177.244.38 X-Original-MAILFROM: max.byungchul.park@gmail.com From: Byungchul Park To: linux-kernel@vger.kernel.org Cc: torvalds@linux-foundation.org, damien.lemoal@opensource.wdc.com, linux-ide@vger.kernel.org, adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, will@kernel.org, tglx@linutronix.de, rostedt@goodmis.org, joel@joelfernandes.org, sashal@kernel.org, daniel.vetter@ffwll.ch, duyuyang@gmail.com, johannes.berg@intel.com, tj@kernel.org, tytso@mit.edu, willy@infradead.org, david@fromorbit.com, amir73il@gmail.com, 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, paolo.valente@linaro.org, josef@toxicpanda.com, linux-fsdevel@vger.kernel.org, viro@zeniv.linux.org.uk, jack@suse.cz, jlayton@kernel.org, dan.j.williams@intel.com, hch@infradead.org, djwong@kernel.org, dri-devel@lists.freedesktop.org, rodrigosiqueiramelo@gmail.com, melissa.srw@gmail.com, hamohammed.sa@gmail.com, 42.hyeyoo@gmail.com, chris.p.wilson@intel.com, gwan-gyeong.mun@intel.com, max.byungchul.park@gmail.com, boqun.feng@gmail.com, longman@redhat.com, hdanton@sina.com Subject: [PATCH v8 13/25] dept: Distinguish each work from another Date: Fri, 27 Jan 2023 10:19:06 +0900 Message-Id: <1674782358-25542-14-git-send-email-max.byungchul.park@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1674782358-25542-1-git-send-email-max.byungchul.park@gmail.com> References: <1674782358-25542-1-git-send-email-max.byungchul.park@gmail.com> X-Rspamd-Queue-Id: D00E9A0004 X-Stat-Signature: jzz1ocwn6py8bw4iw9maku1fwgbou41r X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1674782383-900266 X-HE-Meta: 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 AtYaEeXA PWOsImKXUkLljz+91LsDZzEyogeU9fcu74vgvO6pnG9XSo2vWJW8NJx8gCmA8+ien+vLsZmEdqww3vYKfRgJlVcAOqgKCgsXH8gYIVOtrMWAIeGGSk/aKtfoV2vgfYCGhV2pBf9rfWafsOdtxA0tJo5BzKnrtPOuROF4uzTD25RxwiH8CFJrJU0ASSyvDffxdbdS6B7L6wizyGm02DUV3+JolJev3Urpyif0zcIW6xOfT4kVjQih6FuCiu/0+LYE9jdA6x1UD2xmcqGeyD95S3mGgkdkJ4xTyIuVHxfBTJW3b9tKm7uuirHxxX/lBrqfE3z7M 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 41768cc..88cb5ab 100644 --- a/include/linux/dept.h +++ b/include/linux/dept.h @@ -515,6 +515,7 @@ struct dept_task { extern void dept_sched_enter(void); extern void dept_sched_exit(void); extern void dept_kernel_enter(void); +extern void dept_work_enter(void); static inline void dept_ecxt_enter_nokeep(struct dept_map *m) { @@ -565,6 +566,7 @@ static inline void dept_ecxt_enter_nokeep(struct dept_map *m) #define dept_sched_enter() do { } while (0) #define dept_sched_exit() do { } while (0) #define dept_kernel_enter() do { } while (0) +#define dept_work_enter() do { } while (0) #define dept_ecxt_enter_nokeep(m) do { } while (0) #define dept_key_init(k) do { (void)(k); } while (0) #define dept_key_destroy(k) do { (void)(k); } while (0) diff --git a/kernel/dependency/dept.c b/kernel/dependency/dept.c index edca697..711bd86 100644 --- a/kernel/dependency/dept.c +++ b/kernel/dependency/dept.c @@ -1954,6 +1954,16 @@ void dept_hardirqs_off(unsigned long ip) } EXPORT_SYMBOL_GPL(dept_hardirqs_off); +/* + * 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 07895de..69c4f46 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -51,6 +51,7 @@ #include #include #include +#include #include "workqueue_internal.h" @@ -2199,6 +2200,8 @@ 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);