From patchwork Thu Jan 27 01:11:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Byungchul Park X-Patchwork-Id: 12726030 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 9D0ACC4707E for ; Thu, 27 Jan 2022 01:11:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234561AbiA0BLb (ORCPT ); Wed, 26 Jan 2022 20:11:31 -0500 Received: from lgeamrelo13.lge.com ([156.147.23.53]:46053 "EHLO lgeamrelo11.lge.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S234398AbiA0BLX (ORCPT ); Wed, 26 Jan 2022 20:11:23 -0500 Received: from unknown (HELO lgemrelse6q.lge.com) (156.147.1.121) by 156.147.23.53 with ESMTP; 27 Jan 2022 10:11:19 +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; 27 Jan 2022 10:11:19 +0900 X-Original-SENDERIP: 10.177.244.38 X-Original-MAILFROM: byungchul.park@lge.com From: Byungchul Park To: torvalds@linux-foundation.org, mingo@redhat.com, linux-kernel@vger.kernel.org Cc: 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, 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 on v5.17-rc1 09/14] dept: Apply Dept to rwsem Date: Thu, 27 Jan 2022 10:11:07 +0900 Message-Id: <1643245873-15542-9-git-send-email-byungchul.park@lge.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1643245873-15542-1-git-send-email-byungchul.park@lge.com> References: <1643245733-14513-1-git-send-email-byungchul.park@lge.com> <1643245873-15542-1-git-send-email-byungchul.park@lge.com> Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Makes Dept able to track dependencies by rwsem. Signed-off-by: Byungchul Park --- include/linux/lockdep.h | 24 ++++++++++++++++++++---- include/linux/percpu-rwsem.h | 10 +++++++++- include/linux/rwsem.h | 31 +++++++++++++++++++++++++++++++ 3 files changed, 60 insertions(+), 5 deletions(-) diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h index 306c22d..6aab26c 100644 --- a/include/linux/lockdep.h +++ b/include/linux/lockdep.h @@ -644,10 +644,26 @@ static inline void print_irqtrace_events(struct task_struct *curr) dept_mutex_unlock(&(l)->dmap, i); \ } while (0) -#define rwsem_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i) -#define rwsem_acquire_nest(l, s, t, n, i) lock_acquire_exclusive(l, s, t, n, i) -#define rwsem_acquire_read(l, s, t, i) lock_acquire_shared(l, s, t, NULL, i) -#define rwsem_release(l, i) lock_release(l, i) +#define rwsem_acquire(l, s, t, i) \ +do { \ + lock_acquire_exclusive(l, s, t, NULL, i); \ + dept_rwsem_lock(&(l)->dmap, s, t, NULL, "up_write", i); \ +} while (0) +#define rwsem_acquire_nest(l, s, t, n, i) \ +do { \ + lock_acquire_exclusive(l, s, t, n, i); \ + dept_rwsem_lock(&(l)->dmap, s, t, (n) ? &(n)->dmap : NULL, "up_write", i);\ +} while (0) +#define rwsem_acquire_read(l, s, t, i) \ +do { \ + lock_acquire_shared(l, s, t, NULL, i); \ + dept_rwsem_lock(&(l)->dmap, s, t, NULL, "up_read", i); \ +} while (0) +#define rwsem_release(l, i) \ +do { \ + lock_release(l, i); \ + dept_rwsem_unlock(&(l)->dmap, i); \ +} while (0) #define lock_map_acquire(l) lock_acquire_exclusive(l, 0, 0, NULL, _THIS_IP_) #define lock_map_acquire_read(l) lock_acquire_shared_recursive(l, 0, 0, NULL, _THIS_IP_) diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h index 5fda40f..7ec5625 100644 --- a/include/linux/percpu-rwsem.h +++ b/include/linux/percpu-rwsem.h @@ -20,8 +20,16 @@ struct percpu_rw_semaphore { #endif }; +#ifdef CONFIG_DEPT +#define __PERCPU_RWSEM_DMAP_INIT(lockname) .dmap = { .name = #lockname } +#else +#define __PERCPU_RWSEM_DMAP_INIT(lockname) +#endif + #ifdef CONFIG_DEBUG_LOCK_ALLOC -#define __PERCPU_RWSEM_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname }, +#define __PERCPU_RWSEM_DEP_MAP_INIT(lockname) .dep_map = { \ + .name = #lockname, \ + __PERCPU_RWSEM_DMAP_INIT(lockname) }, #else #define __PERCPU_RWSEM_DEP_MAP_INIT(lockname) #endif diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h index f934876..ec3bc1d 100644 --- a/include/linux/rwsem.h +++ b/include/linux/rwsem.h @@ -16,11 +16,18 @@ #include #include +#ifdef CONFIG_DEPT +# define RWSEM_DMAP_INIT(lockname) .dmap = { .name = #lockname }, +#else +# define RWSEM_DMAP_INIT(lockname) +#endif + #ifdef CONFIG_DEBUG_LOCK_ALLOC # define __RWSEM_DEP_MAP_INIT(lockname) \ .dep_map = { \ .name = #lockname, \ .wait_type_inner = LD_WAIT_SLEEP, \ + RWSEM_DMAP_INIT(lockname) \ }, #else # define __RWSEM_DEP_MAP_INIT(lockname) @@ -32,6 +39,30 @@ #include #endif +#ifdef CONFIG_DEPT +#define dept_rwsem_lock(m, ne, t, n, e_fn, ip) \ +do { \ + if (t) { \ + dept_ecxt_enter(m, 1UL, ip, __func__, e_fn, ne); \ + dept_asked_event(m); \ + } else if (n) { \ + dept_warn_on(dept_top_map() != (n)); \ + } else { \ + dept_wait(m, 1UL, ip, __func__, ne); \ + dept_ecxt_enter(m, 1UL, ip, __func__, e_fn, ne); \ + dept_asked_event(m); \ + } \ +} while (0) +#define dept_rwsem_unlock(m, ip) \ +do { \ + dept_event(m, 1UL, ip, __func__); \ + dept_ecxt_exit(m, ip); \ +} while (0) +#else +#define dept_rwsem_lock(m, ne, t, n, e_fn, ip) do { } while (0) +#define dept_rwsem_unlock(m, ip) do { } while (0) +#endif + /* * For an uncontended rwsem, count and owner are the only fields a task * needs to touch when acquiring the rwsem. So they are put next to each