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From: Catalin Marinas <catalin.marinas@arm.com>
To: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org, linux-arch@vger.kernel.org,
	linux-kernel@vger.kernel.org, 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: Re: [PATCH v6 20/21] arm64: Remove logic to kill 32-bit tasks on 64-bit-only cores
Date: Mon, 24 May 2021 16:47:59 +0100	[thread overview]
Message-ID: <20210524154758.GG14645@arm.com> (raw)
In-Reply-To: <20210518094725.7701-21-will@kernel.org>

On Tue, May 18, 2021 at 10:47:24AM +0100, Will Deacon wrote:
> The scheduler now knows enough about these braindead systems to place
> 32-bit tasks accordingly, so throw out the safety checks and allow the
> ret-to-user path to avoid do_notify_resume() if there is nothing to do.
> 
> Signed-off-by: Will Deacon <will@kernel.org>

Acked-by: Catalin Marinas <catalin.marinas@arm.com>

WARNING: multiple messages have this Message-ID (diff)
From: Catalin Marinas <catalin.marinas@arm.com>
To: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org, linux-arch@vger.kernel.org,
	linux-kernel@vger.kernel.org, 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: Re: [PATCH v6 20/21] arm64: Remove logic to kill 32-bit tasks on 64-bit-only cores
Date: Mon, 24 May 2021 16:47:59 +0100	[thread overview]
Message-ID: <20210524154758.GG14645@arm.com> (raw)
In-Reply-To: <20210518094725.7701-21-will@kernel.org>

On Tue, May 18, 2021 at 10:47:24AM +0100, Will Deacon wrote:
> The scheduler now knows enough about these braindead systems to place
> 32-bit tasks accordingly, so throw out the safety checks and allow the
> ret-to-user path to avoid do_notify_resume() if there is nothing to do.
> 
> Signed-off-by: Will Deacon <will@kernel.org>

Acked-by: Catalin Marinas <catalin.marinas@arm.com>

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  reply	other threads:[~2021-05-24 16:09 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 ` [PATCH v6 14/21] freezer: Add frozen_or_skipped() helper function Will Deacon
2021-05-18  9:47   ` 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 [this message]
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

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