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dmarc=none (p=none dis=none) header.from=sk.com; spf=pass smtp.mailfrom=sk.com; arc=none smtp.client-ip=166.125.252.92 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sk.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sk.com X-AuditID: a67dfc5b-681ff7000002311f-4e-682319f31c84 From: Byungchul Park To: linux-kernel@vger.kernel.org Cc: kernel_team@skhynix.com, 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, josef@toxicpanda.com, linux-fsdevel@vger.kernel.org, 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, harry.yoo@oracle.com, chris.p.wilson@intel.com, gwan-gyeong.mun@intel.com, max.byungchul.park@gmail.com, boqun.feng@gmail.com, longman@redhat.com, yskelg@gmail.com, yunseong.kim@ericsson.com, yeoreum.yun@arm.com, netdev@vger.kernel.org, matthew.brost@intel.com, her0gyugyu@gmail.com Subject: [PATCH v15 41/43] dept: introduce event_site() to disable event tracking if it's recoverable Date: Tue, 13 May 2025 19:07:28 +0900 Message-Id: <20250513100730.12664-42-byungchul@sk.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20250513100730.12664-1-byungchul@sk.com> References: <20250513100730.12664-1-byungchul@sk.com> X-Brightmail-Tracker: H4sIAAAAAAAAAzWSfUxTZxjF97739t7bji6XzswXcbh1IUbmBxidz5JtIdkS3xk1S/bPpkZt 7I1thKItIhiNVNCwMhjrVsn8wIK2NlCktGw6ZxFLrDAyhpMVqICCBodSSNA2ovhRuu2fJ7+c k3Oef47AqK7LFgh6Q75kNGhy1JyCVUSSapc9SnlPl1keToHo4zIWTja5Oeg534DA3WLGMH5t LfTFJhA8++NPBqptPQhqR4YYaAkOI/C7DnNw894b0Bud4qDTVs5ByZkmDm48nMUweMyKocG7 AW47x1joqqrDUD3OwYnqEhw//2CYcdbz4CxOh1HXcR5mR7KgczgkA3/4ffipZpCDy/5OFoIX RzHcvHSSg2H3Sxl0BTtYiFWmQs/3FTJonKzj4GHMyYAzOsXDX212DEH7W+ApjRceffRCBtcr 2jAcPduMoXfgNwStZXcweN0hDtqjExh8XhsDT89dQzBaGeHhyLczPJwwVyIoP3KMhdLB1fDs SfzzqcdZYD7tYaHxeQhlf0zdNW5E2yemGFrq20efRv/mqD9mZ+nvdYT+enyIp6WtYZ7avXup z5VBz1wex7R2Oiqj3vpvOOqdtvLUEunFdLK7m/9i4SbFR1opR18gGVd8sl2hC5dcYnffTSuM dJQxxchBLEgQiLiKdDVnW5A8gSNNIWaOOXEx6e+fSfA88R3iqxiTWZBCYMTQ66Tv1ACaM94U JfKi5UGCWTGdlHgciYBS/ICMBQ/z/5YuIg2etoQuj+vPz3Wzc6wSV5MqewM7V0rEH+TklsX6 XyCFXHX1s1VIaUev1SOV3lCQq9HnrFquKzLoC5fvyMv1ovi8nAdnN19E0z1fBpAoIHWSsmP8 XZ1KpikwFeUGEBEY9Tyl+UJcUmo1RfslY942494cyRRAqQKrnq9cGdunVYk7NfnSLknaLRn/ d7EgX1CMFmZq021rDtXs+c7qup+2J3Nn2afrypsl7VL5CnPBorMrqx78yGccWk92eEN24kkO Ce6v/N2+sJWxrU3bNoRNmy98GIokK7NTJx0DlNmSbMG3HZ8bfmntWtKXH/Ql7Wrs2Bro/Xpd 05NhW4Xis/af118ZK3w7sGmj1HzDkZdmPqBmTTpNVgZjNGleAQftGd9aAwAA X-Brightmail-Tracker: H4sIAAAAAAAAAzWSbUhTcRSH+9/XuZpcltjN6G1hRaFmaJwoovriJejFCgqll0vd2nDOsZVl IWhTMUsxQaUXbVlNczPXppSVZopLs8xyLR1qaWWtNEPdyprWNPpyeHh+nN/5ckS4tJwMEilU xwSNilfKKDEh3rZOFzI6d4l8Vd0oAe6xTAKuVJooaL9tRGCqSsXA1RQFbzyDCH4/f4FDYX47 gmt9PThU2XoR1JadoaDjgz/Y3cMUtOSfo0B3vZKCl1+9GHQX5GFgtGyFt4YBAlpzSzAodFFw uVCH+cZnDMYN5TQYUoKhv+wSDd6+cGjpdZDQWNRCQq1zJVws7qbgYW0LAbZ7/Rh03L9CQa/p DwmttmYCPDnzoP1CNgkV30oo+Oox4GBwD9Pwql6PgU0fCOY0X2vG6CQJT7LrMci4cQcDe9cD BHWZ7zCwmBwUNLoHMbBa8nH4VdqEoD9niIb08+M0XE7NQXAuvYCAtO5I+P3Td7loLBxSr5oJ qJhwoI0bOFOxCXGNg8M4l2Y9wf1yv6a4Wo+e4J6WsFzNpR6aS6tz0pzecpyzlq3grj90Ydy1 ETfJWcrPUpxlJI/msobsGPetrY3eMT9GvP6woFQkCpqwDQfFcqfuPqF+v+DkUHMmnoJuslnI T8QyEWxfpQOfYopZxnZ2jk9zALOItWYPkFlILMIZx0z2TVEXmgpmMwI7WfVlmgkmmNWZb04v SJg17IDtDP2vdCFrNNdPez+fnyhtI6ZYykSyuXojkYvEejSjHAUoVInxvEIZGaqNkyepFCdD DyXEW5DvgwzJ3gv30FhHVANiREg2S9LsWiyXknyiNim+AbEiXBYgSb3rU5LDfNIpQZNwQHNc KWgb0DwRIZsj2bJHOChljvLHhDhBUAua/ykm8gtKQXudF5VNMdGns6010tjlCUtCkPqI8a7p RVdYE7svPekRtqs6omc+b+oMq1mtWZQYFRhitxd4S9XS8Oi813G3tjz++OMZUT/HtRbt/LR/ b8buyJrqQxtj/CNGNvc4k2Wb1GPf82M7mISz3qV89Z/hXUOqtYF9k9Fo+7pPwZZZE+lmGaGV 8+ErcI2W/wtD0xxuPQMAAA== X-CFilter-Loop: Reflected Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" With multi event sites for a single wait, dept allows to skip tracking an event that is recoverable by other recover paths. Introduce an API, event_site(), to skip tracking the event in the case. Signed-off-by: Byungchul Park --- include/linux/dept.h | 30 ++++++++++++++++++++++++++++++ include/linux/sched.h | 6 ++++++ kernel/dependency/dept.c | 20 ++++++++++++++++++++ 3 files changed, 56 insertions(+) diff --git a/include/linux/dept.h b/include/linux/dept.h index a97f34d62468..b2292587c1cc 100644 --- a/include/linux/dept.h +++ b/include/linux/dept.h @@ -492,6 +492,31 @@ extern void dept_task_exit(struct task_struct *t); extern void dept_free_range(void *start, unsigned int sz); extern void dept_mark_event_site_used(void *start, void *end); =20 +extern void disable_event_track(void); +extern void enable_event_track(void); + +#define event_site(es, evt_func, ...) \ +do { \ + unsigned long _flags; \ + bool _disable; \ + \ + local_irq_save(_flags); \ + dept_event_site_used(es); \ + /* \ + * If !list_empty(&(es)->dept_head), the event site can be \ + * recovered by others. Do not track event dependency if so. \ + */ \ + _disable =3D !list_empty(&(es)->dep_head); \ + if (_disable) \ + disable_event_track(); \ + \ + evt_func(__VA_ARGS__); \ + \ + if (_disable) \ + enable_event_track(); \ + local_irq_restore(_flags); \ +} while (0) + extern void dept_map_init(struct dept_map *m, struct dept_key *k, int sub_= u, const char *n); extern void dept_map_reinit(struct dept_map *m, struct dept_key *k, int su= b_u, const char *n); extern void dept_ext_wgen_init(struct dept_ext_wgen *ewg); @@ -555,6 +580,11 @@ struct dept_event_site { }; #define dept_task_exit(t) do { } while (0) #define dept_free_range(s, sz) do { } while (0) #define dept_mark_event_site_used(s, e) do { } while (0) +#define event_site(es, evt_func, ...) \ +do { \ + (void)(es); \ + evt_func(__VA_ARGS__); \ +} while (0) =20 #define dept_map_init(m, k, su, n) do { (void)(n); (void)(k); } while (0) #define dept_map_reinit(m, k, su, n) do { (void)(n); (void)(k); } while = (0) diff --git a/include/linux/sched.h b/include/linux/sched.h index 43927e61921b..44a77b7116b7 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -873,6 +873,11 @@ struct dept_task { */ int missing_ecxt; =20 + /* + * not to track events + */ + int disable_event_track_cnt; + /* * for tracking IRQ-enable state */ @@ -910,6 +915,7 @@ struct dept_task { .stage_wait_stack =3D NULL, \ .stage_lock =3D (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED,\ .missing_ecxt =3D 0, \ + .disable_event_track_cnt =3D 0, \ .hardirqs_enabled =3D false, \ .softirqs_enabled =3D false, \ .task_exit =3D false, \ diff --git a/kernel/dependency/dept.c b/kernel/dependency/dept.c index bd46c2ce84eb..03d6c057cdc5 100644 --- a/kernel/dependency/dept.c +++ b/kernel/dependency/dept.c @@ -2585,6 +2585,23 @@ static void __dept_wait(struct dept_map *m, unsigned= long w_f, } } =20 +void disable_event_track(void) +{ + dept_task()->disable_event_track_cnt++; +} +EXPORT_SYMBOL_GPL(disable_event_track); + +void enable_event_track(void) +{ + dept_task()->disable_event_track_cnt--; +} +EXPORT_SYMBOL_GPL(enable_event_track); + +static bool event_track_disabled(void) +{ + return !!dept_task()->disable_event_track_cnt; +} + /* * Called between dept_enter() and dept_exit(). */ @@ -2597,6 +2614,9 @@ static void __dept_event(struct dept_map *m, struct d= ept_map *real_m, struct dept_key *k; int e; =20 + if (event_track_disabled()) + return; + e =3D find_first_bit(&e_f, DEPT_MAX_SUBCLASSES_EVT); =20 if (DEPT_WARN_ON(e >=3D DEPT_MAX_SUBCLASSES_EVT)) --=20 2.17.1