From: Will Deacon <will@kernel.org> To: linux-arm-kernel@lists.infradead.org Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, Will Deacon <will@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>, Marc Zyngier <maz@kernel.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Peter Zijlstra <peterz@infradead.org>, Morten Rasmussen <morten.rasmussen@arm.com>, Qais Yousef <qais.yousef@arm.com>, Suren Baghdasaryan <surenb@google.com>, Quentin Perret <qperret@google.com>, Tejun Heo <tj@kernel.org>, Johannes Weiner <hannes@cmpxchg.org>, Ingo Molnar <mingo@redhat.com>, Juri Lelli <juri.lelli@redhat.com>, Vincent Guittot <vincent.guittot@linaro.org>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, Dietmar Eggemann <dietmar.eggemann@arm.com>, Daniel Bristot de Oliveira <bristot@redhat.com>, kernel-team@android.com Subject: [PATCH v7 15/22] freezer: Add frozen_or_skipped() helper function Date: Tue, 25 May 2021 16:14:25 +0100 [thread overview] Message-ID: <20210525151432.16875-16-will@kernel.org> (raw) In-Reply-To: <20210525151432.16875-1-will@kernel.org> Occasionally it is necessary to see if a task is either frozen or sleeping in the PF_FREEZER_SKIP state. In preparation for adding additional users of this check, introduce a frozen_or_skipped() helper function and convert the hung task detector over to using it. Signed-off-by: Will Deacon <will@kernel.org> --- include/linux/freezer.h | 6 ++++++ kernel/hung_task.c | 4 ++-- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/include/linux/freezer.h b/include/linux/freezer.h index 0621c5f86c39..b9e1e4200101 100644 --- a/include/linux/freezer.h +++ b/include/linux/freezer.h @@ -27,6 +27,11 @@ static inline bool frozen(struct task_struct *p) return p->flags & PF_FROZEN; } +static inline bool frozen_or_skipped(struct task_struct *p) +{ + return p->flags & (PF_FROZEN | PF_FREEZER_SKIP); +} + extern bool freezing_slow_path(struct task_struct *p); /* @@ -270,6 +275,7 @@ static inline int freezable_schedule_hrtimeout_range(ktime_t *expires, #else /* !CONFIG_FREEZER */ static inline bool frozen(struct task_struct *p) { return false; } +static inline bool frozen_or_skipped(struct task_struct *p) { return false; } static inline bool freezing(struct task_struct *p) { return false; } static inline void __thaw_task(struct task_struct *t) {} diff --git a/kernel/hung_task.c b/kernel/hung_task.c index 396ebaebea3f..d2d4c4159b23 100644 --- a/kernel/hung_task.c +++ b/kernel/hung_task.c @@ -92,8 +92,8 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout) * Ensure the task is not frozen. * Also, skip vfork and any other user process that freezer should skip. */ - if (unlikely(t->flags & (PF_FROZEN | PF_FREEZER_SKIP))) - return; + if (unlikely(frozen_or_skipped(t))) + return; /* * When a freshly created task is scheduled once, changes its state to -- 2.31.1.818.g46aad6cb9e-goog
WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will@kernel.org> To: linux-arm-kernel@lists.infradead.org Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, Will Deacon <will@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>, Marc Zyngier <maz@kernel.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Peter Zijlstra <peterz@infradead.org>, Morten Rasmussen <morten.rasmussen@arm.com>, Qais Yousef <qais.yousef@arm.com>, Suren Baghdasaryan <surenb@google.com>, Quentin Perret <qperret@google.com>, Tejun Heo <tj@kernel.org>, Johannes Weiner <hannes@cmpxchg.org>, Ingo Molnar <mingo@redhat.com>, Juri Lelli <juri.lelli@redhat.com>, Vincent Guittot <vincent.guittot@linaro.org>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, Dietmar Eggemann <dietmar.eggemann@arm.com>, Daniel Bristot de Oliveira <bristot@redhat.com>, kernel-team@android.com Subject: [PATCH v7 15/22] freezer: Add frozen_or_skipped() helper function Date: Tue, 25 May 2021 16:14:25 +0100 [thread overview] Message-ID: <20210525151432.16875-16-will@kernel.org> (raw) In-Reply-To: <20210525151432.16875-1-will@kernel.org> Occasionally it is necessary to see if a task is either frozen or sleeping in the PF_FREEZER_SKIP state. In preparation for adding additional users of this check, introduce a frozen_or_skipped() helper function and convert the hung task detector over to using it. Signed-off-by: Will Deacon <will@kernel.org> --- include/linux/freezer.h | 6 ++++++ kernel/hung_task.c | 4 ++-- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/include/linux/freezer.h b/include/linux/freezer.h index 0621c5f86c39..b9e1e4200101 100644 --- a/include/linux/freezer.h +++ b/include/linux/freezer.h @@ -27,6 +27,11 @@ static inline bool frozen(struct task_struct *p) return p->flags & PF_FROZEN; } +static inline bool frozen_or_skipped(struct task_struct *p) +{ + return p->flags & (PF_FROZEN | PF_FREEZER_SKIP); +} + extern bool freezing_slow_path(struct task_struct *p); /* @@ -270,6 +275,7 @@ static inline int freezable_schedule_hrtimeout_range(ktime_t *expires, #else /* !CONFIG_FREEZER */ static inline bool frozen(struct task_struct *p) { return false; } +static inline bool frozen_or_skipped(struct task_struct *p) { return false; } static inline bool freezing(struct task_struct *p) { return false; } static inline void __thaw_task(struct task_struct *t) {} diff --git a/kernel/hung_task.c b/kernel/hung_task.c index 396ebaebea3f..d2d4c4159b23 100644 --- a/kernel/hung_task.c +++ b/kernel/hung_task.c @@ -92,8 +92,8 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout) * Ensure the task is not frozen. * Also, skip vfork and any other user process that freezer should skip. */ - if (unlikely(t->flags & (PF_FROZEN | PF_FREEZER_SKIP))) - return; + if (unlikely(frozen_or_skipped(t))) + return; /* * When a freshly created task is scheduled once, changes its state to -- 2.31.1.818.g46aad6cb9e-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-05-25 15:16 UTC|newest] Thread overview: 114+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-05-25 15:14 [PATCH v7 00/22] Add support for 32-bit tasks on asymmetric AArch32 systems Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 01/22] sched: Favour predetermined active CPU as migration destination Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-26 11:14 ` Valentin Schneider 2021-05-26 11:14 ` Valentin Schneider 2021-05-26 12:32 ` Peter Zijlstra 2021-05-26 12:32 ` Peter Zijlstra 2021-05-26 12:36 ` Valentin Schneider 2021-05-26 12:36 ` Valentin Schneider 2021-05-26 16:03 ` Will Deacon 2021-05-26 16:03 ` Will Deacon 2021-05-26 17:46 ` Valentin Schneider 2021-05-26 17:46 ` Valentin Schneider 2021-05-25 15:14 ` [PATCH v7 02/22] arm64: cpuinfo: Split AArch32 registers out into a separate struct Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 03/22] arm64: Allow mismatched 32-bit EL0 support Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 04/22] KVM: arm64: Kill 32-bit vCPUs on systems with mismatched " Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 05/22] arm64: Kill 32-bit applications scheduled on 64-bit-only CPUs Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 06/22] arm64: Advertise CPUs capable of running 32-bit applications in sysfs Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 07/22] sched: Introduce task_cpu_possible_mask() to limit fallback rq selection Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 08/22] cpuset: Don't use the cpu_possible_mask as a last resort for cgroup v1 Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-26 15:02 ` Peter Zijlstra 2021-05-26 15:02 ` Peter Zijlstra 2021-05-26 16:07 ` Will Deacon 2021-05-26 16:07 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 09/22] cpuset: Honour task_cpu_possible_mask() in guarantee_online_cpus() Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 10/22] sched: Reject CPU affinity changes based on task_cpu_possible_mask() Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-26 15:15 ` Peter Zijlstra 2021-05-26 15:15 ` Peter Zijlstra 2021-05-26 16:12 ` Will Deacon 2021-05-26 16:12 ` Will Deacon 2021-05-26 17:56 ` Peter Zijlstra 2021-05-26 17:56 ` Peter Zijlstra 2021-05-26 18:59 ` Will Deacon 2021-05-26 18:59 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 11/22] sched: Introduce task_struct::user_cpus_ptr to track requested affinity Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 12/22] sched: Split the guts of sched_setaffinity() into a helper function Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 13/22] sched: Allow task CPU affinity to be restricted on asymmetric systems Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-26 16:20 ` Peter Zijlstra 2021-05-26 16:20 ` Peter Zijlstra 2021-05-26 16:35 ` Will Deacon 2021-05-26 16:35 ` Will Deacon 2021-05-26 16:30 ` Peter Zijlstra 2021-05-26 16:30 ` Peter Zijlstra 2021-05-26 17:02 ` Will Deacon 2021-05-26 17:02 ` Will Deacon 2021-05-27 7:56 ` Peter Zijlstra 2021-05-27 7:56 ` Peter Zijlstra 2021-05-25 15:14 ` [PATCH v7 14/22] sched: Introduce task_cpus_dl_admissible() to check proposed affinity Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` Will Deacon [this message] 2021-05-25 15:14 ` [PATCH v7 15/22] freezer: Add frozen_or_skipped() helper function Will Deacon 2021-05-25 15:14 ` [PATCH v7 16/22] sched: Defer wakeup in ttwu() for unschedulable frozen tasks Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-27 14:10 ` Peter Zijlstra 2021-05-27 14:10 ` Peter Zijlstra 2021-05-27 14:31 ` Peter Zijlstra 2021-05-27 14:31 ` Peter Zijlstra 2021-05-27 14:44 ` Will Deacon 2021-05-27 14:44 ` Will Deacon 2021-05-27 14:55 ` Peter Zijlstra 2021-05-27 14:55 ` Peter Zijlstra 2021-05-27 14:50 ` Peter Zijlstra 2021-05-27 14:50 ` Peter Zijlstra 2021-05-28 10:49 ` Peter Zijlstra 2021-05-28 10:49 ` Peter Zijlstra 2021-05-27 14:36 ` Will Deacon 2021-05-27 14:36 ` Will Deacon 2021-06-01 8:21 ` [RFC][PATCH] freezer,sched: Rewrite core freezer logic Peter Zijlstra 2021-06-01 8:21 ` Peter Zijlstra 2021-06-01 11:27 ` Peter Zijlstra 2021-06-01 11:27 ` Peter Zijlstra 2021-06-02 12:54 ` Will Deacon 2021-06-02 12:54 ` Will Deacon 2021-06-03 10:35 ` Peter Zijlstra 2021-06-03 10:35 ` Peter Zijlstra 2021-06-03 10:58 ` Will Deacon 2021-06-03 10:58 ` Will Deacon 2021-06-03 11:26 ` Peter Zijlstra 2021-06-03 11:26 ` Peter Zijlstra 2021-06-03 11:36 ` Will Deacon 2021-06-03 11:36 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 17/22] arm64: Implement task_cpu_possible_mask() Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 18/22] arm64: exec: Adjust affinity for compat tasks with mismatched 32-bit EL0 Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 19/22] arm64: Prevent offlining first CPU with 32-bit EL0 on mismatched system Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 20/22] arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0 Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 21/22] arm64: Remove logic to kill 32-bit tasks on 64-bit-only cores Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 15:14 ` [PATCH v7 22/22] Documentation: arm64: describe asymmetric 32-bit support Will Deacon 2021-05-25 15:14 ` Will Deacon 2021-05-25 17:13 ` Marc Zyngier 2021-05-25 17:13 ` Marc Zyngier 2021-05-25 17:27 ` Will Deacon 2021-05-25 17:27 ` Will Deacon 2021-05-25 18:11 ` Marc Zyngier 2021-05-25 18:11 ` Marc Zyngier 2021-05-26 16:00 ` Will Deacon 2021-05-26 16:00 ` Will Deacon
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