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>, Li Zefan <lizefan@huawei.com>, 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>, kernel-team@android.com Subject: [PATCH v6 14/21] freezer: Add frozen_or_skipped() helper function Date: Tue, 18 May 2021 10:47:18 +0100 [thread overview] Message-ID: <20210518094725.7701-15-will@kernel.org> (raw) In-Reply-To: <20210518094725.7701-1-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 -- 2.31.1.751.gd2f1c929bd-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>, Li Zefan <lizefan@huawei.com>, 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>, kernel-team@android.com Subject: [PATCH v6 14/21] freezer: Add frozen_or_skipped() helper function Date: Tue, 18 May 2021 10:47:18 +0100 [thread overview] Message-ID: <20210518094725.7701-15-will@kernel.org> (raw) In-Reply-To: <20210518094725.7701-1-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 -- 2.31.1.751.gd2f1c929bd-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:[~2021-05-18 9:49 UTC|newest] Thread overview: 166+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-05-18 9:47 [PATCH v6 00/21] Add support for 32-bit tasks on asymmetric AArch32 systems Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-18 9:47 ` [PATCH v6 01/21] arm64: cpuinfo: Split AArch32 registers out into a separate struct Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-21 10:47 ` Catalin Marinas 2021-05-21 10:47 ` Catalin Marinas 2021-05-18 9:47 ` [PATCH v6 02/21] arm64: Allow mismatched 32-bit EL0 support Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-21 10:25 ` Catalin Marinas 2021-05-21 10:25 ` Catalin Marinas 2021-05-24 12:05 ` Will Deacon 2021-05-24 12:05 ` Will Deacon 2021-05-24 13:49 ` Catalin Marinas 2021-05-24 13:49 ` Catalin Marinas 2021-05-21 10:41 ` Catalin Marinas 2021-05-21 10:41 ` Catalin Marinas 2021-05-24 12:09 ` Will Deacon 2021-05-24 12:09 ` Will Deacon 2021-05-24 13:46 ` Catalin Marinas 2021-05-24 13:46 ` Catalin Marinas 2021-05-21 15:22 ` Qais Yousef 2021-05-21 15:22 ` Qais Yousef 2021-05-24 20:21 ` Will Deacon 2021-05-24 20:21 ` Will Deacon 2021-05-18 9:47 ` [PATCH v6 03/21] KVM: arm64: Kill 32-bit vCPUs on systems with mismatched " Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-21 10:47 ` Catalin Marinas 2021-05-21 10:47 ` Catalin Marinas 2021-05-18 9:47 ` [PATCH v6 04/21] arm64: Kill 32-bit applications scheduled on 64-bit-only CPUs Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-21 10:55 ` Catalin Marinas 2021-05-21 10:55 ` Catalin Marinas 2021-05-18 9:47 ` [PATCH v6 05/21] arm64: Advertise CPUs capable of running 32-bit applications in sysfs Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-21 11:00 ` Catalin Marinas 2021-05-21 11:00 ` Catalin Marinas 2021-05-18 9:47 ` [PATCH v6 06/21] sched: Introduce task_cpu_possible_mask() to limit fallback rq selection Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-21 16:03 ` Peter Zijlstra 2021-05-21 16:03 ` Peter Zijlstra 2021-05-24 12:17 ` Will Deacon 2021-05-24 12:17 ` Will Deacon 2021-05-18 9:47 ` [PATCH v6 07/21] cpuset: Don't use the cpu_possible_mask as a last resort for cgroup v1 Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-21 17:39 ` Qais Yousef 2021-05-21 17:39 ` Qais Yousef 2021-05-24 20:21 ` Will Deacon 2021-05-24 20:21 ` Will Deacon 2021-05-18 9:47 ` [PATCH v6 08/21] cpuset: Honour task_cpu_possible_mask() in guarantee_online_cpus() Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-21 16:25 ` Qais Yousef 2021-05-21 16:25 ` Qais Yousef 2021-05-24 21:09 ` Will Deacon 2021-05-24 21:09 ` Will Deacon 2021-05-18 9:47 ` [PATCH v6 09/21] sched: Reject CPU affinity changes based on task_cpu_possible_mask() Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-18 9:47 ` [PATCH v6 10/21] sched: Introduce task_struct::user_cpus_ptr to track requested affinity Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-18 9:47 ` [PATCH v6 11/21] sched: Split the guts of sched_setaffinity() into a helper function Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-21 16:41 ` Qais Yousef 2021-05-21 16:41 ` Qais Yousef 2021-05-24 21:16 ` Will Deacon 2021-05-24 21:16 ` Will Deacon 2021-05-18 9:47 ` [PATCH v6 12/21] sched: Allow task CPU affinity to be restricted on asymmetric systems Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-21 17:11 ` Qais Yousef 2021-05-21 17:11 ` Qais Yousef 2021-05-24 21:43 ` Will Deacon 2021-05-24 21:43 ` Will Deacon 2021-05-18 9:47 ` [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-18 10:20 ` Quentin Perret 2021-05-18 10:20 ` Quentin Perret 2021-05-18 10:28 ` Will Deacon 2021-05-18 10:28 ` Will Deacon 2021-05-18 10:48 ` Quentin Perret 2021-05-18 10:48 ` Quentin Perret 2021-05-18 10:59 ` Will Deacon 2021-05-18 10:59 ` Will Deacon 2021-05-18 13:19 ` Quentin Perret 2021-05-18 13:19 ` Quentin Perret 2021-05-20 9:13 ` Juri Lelli 2021-05-20 9:13 ` Juri Lelli 2021-05-20 10:16 ` Will Deacon 2021-05-20 10:16 ` Will Deacon 2021-05-20 10:33 ` Quentin Perret 2021-05-20 10:33 ` Quentin Perret 2021-05-20 12:38 ` Juri Lelli 2021-05-20 12:38 ` Juri Lelli 2021-05-20 12:38 ` Daniel Bristot de Oliveira 2021-05-20 12:38 ` Daniel Bristot de Oliveira 2021-05-20 15:06 ` Dietmar Eggemann 2021-05-20 15:06 ` Dietmar Eggemann 2021-05-20 16:00 ` Daniel Bristot de Oliveira 2021-05-20 16:00 ` Daniel Bristot de Oliveira 2021-05-20 17:55 ` Dietmar Eggemann 2021-05-20 17:55 ` Dietmar Eggemann 2021-05-20 18:03 ` Will Deacon 2021-05-20 18:03 ` Will Deacon 2021-05-21 11:26 ` Dietmar Eggemann 2021-05-21 11:26 ` Dietmar Eggemann 2021-05-20 18:01 ` Will Deacon 2021-05-20 18:01 ` Will Deacon 2021-05-21 5:25 ` Juri Lelli 2021-05-21 5:25 ` Juri Lelli 2021-05-21 8:15 ` Quentin Perret 2021-05-21 8:15 ` Quentin Perret 2021-05-21 8:39 ` Juri Lelli 2021-05-21 8:39 ` Juri Lelli 2021-05-21 10:37 ` Will Deacon 2021-05-21 10:37 ` Will Deacon 2021-05-21 11:23 ` Dietmar Eggemann 2021-05-21 11:23 ` Dietmar Eggemann 2021-05-21 13:02 ` Quentin Perret 2021-05-21 13:02 ` Quentin Perret 2021-05-21 14:04 ` Juri Lelli 2021-05-21 14:04 ` Juri Lelli 2021-05-21 17:47 ` Dietmar Eggemann 2021-05-21 17:47 ` Dietmar Eggemann 2021-05-21 13:00 ` Daniel Bristot de Oliveira 2021-05-21 13:00 ` Daniel Bristot de Oliveira 2021-05-21 13:12 ` Quentin Perret 2021-05-21 13:12 ` Quentin Perret 2021-05-24 20:47 ` Will Deacon 2021-05-24 20:47 ` Will Deacon 2021-05-18 9:47 ` Will Deacon [this message] 2021-05-18 9:47 ` [PATCH v6 14/21] freezer: Add frozen_or_skipped() helper function Will Deacon 2021-05-18 9:47 ` [PATCH v6 15/21] sched: Defer wakeup in ttwu() for unschedulable frozen tasks Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-18 9:47 ` [PATCH v6 16/21] arm64: Implement task_cpu_possible_mask() Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-24 14:57 ` Catalin Marinas 2021-05-24 14:57 ` Catalin Marinas 2021-05-18 9:47 ` [PATCH v6 17/21] arm64: exec: Adjust affinity for compat tasks with mismatched 32-bit EL0 Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-24 15:02 ` Catalin Marinas 2021-05-24 15:02 ` Catalin Marinas 2021-05-18 9:47 ` [PATCH v6 18/21] arm64: Prevent offlining first CPU with 32-bit EL0 on mismatched system Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-24 15:46 ` Catalin Marinas 2021-05-24 15:46 ` Catalin Marinas 2021-05-24 20:32 ` Will Deacon 2021-05-24 20:32 ` Will Deacon 2021-05-25 9:43 ` Catalin Marinas 2021-05-25 9:43 ` Catalin Marinas 2021-05-18 9:47 ` [PATCH v6 19/21] arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0 Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-24 15:47 ` Catalin Marinas 2021-05-24 15:47 ` Catalin Marinas 2021-05-18 9:47 ` [PATCH v6 20/21] arm64: Remove logic to kill 32-bit tasks on 64-bit-only cores Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-24 15:47 ` Catalin Marinas 2021-05-24 15:47 ` Catalin Marinas 2021-05-18 9:47 ` [PATCH v6 21/21] Documentation: arm64: describe asymmetric 32-bit support Will Deacon 2021-05-18 9:47 ` Will Deacon 2021-05-21 17:37 ` Qais Yousef 2021-05-21 17:37 ` Qais Yousef 2021-05-24 21:46 ` Will Deacon 2021-05-24 21:46 ` Will Deacon 2021-05-24 16:22 ` Catalin Marinas 2021-05-24 16:22 ` Catalin Marinas 2021-05-21 17:45 ` [PATCH v6 00/21] Add support for 32-bit tasks on asymmetric AArch32 systems Qais Yousef 2021-05-21 17:45 ` Qais Yousef 2021-05-24 22:08 ` Will Deacon 2021-05-24 22:08 ` Will Deacon
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20210518094725.7701-15-will@kernel.org \ --to=will@kernel.org \ --cc=catalin.marinas@arm.com \ --cc=gregkh@linuxfoundation.org \ --cc=hannes@cmpxchg.org \ --cc=juri.lelli@redhat.com \ --cc=kernel-team@android.com \ --cc=linux-arch@vger.kernel.org \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=lizefan@huawei.com \ --cc=maz@kernel.org \ --cc=mingo@redhat.com \ --cc=morten.rasmussen@arm.com \ --cc=peterz@infradead.org \ --cc=qais.yousef@arm.com \ --cc=qperret@google.com \ --cc=rjw@rjwysocki.net \ --cc=surenb@google.com \ --cc=tj@kernel.org \ --cc=vincent.guittot@linaro.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.