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From: Peter Zijlstra <peterz@infradead.org>
To: rjw@rjwysocki.net, oleg@redhat.com, mingo@kernel.org,
	vincent.guittot@linaro.org, dietmar.eggemann@arm.com,
	rostedt@goodmis.org, mgorman@suse.de, ebiederm@xmission.com,
	bigeasy@linutronix.de, Will Deacon <will@kernel.org>
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org,
	tj@kernel.org, linux-pm@vger.kernel.org
Subject: [PATCH 0/5] ptrace-vs-PREEMPT_RT and freezer rewrite
Date: Tue, 12 Apr 2022 13:44:21 +0200	[thread overview]
Message-ID: <20220412114421.691372568@infradead.org> (raw)

Hi all,

Reviving the freezer rewrite that was languishing, reinvigorated by the
recent ptrace-vs-PREEMPT_RT trouble.

The first patch adds additional state to signal/ptrace stop states, this state
is then used to fix the PREEMPT_RT issue (patch #2) and allow the new freezer
to recover the special stop states (patch #5).

I'm not completely happy with the ptrace solution, but I think it solves all
the various issues I found. I still dislike wait_task_inactive() and now we
have a second copy of that :/

Please consider carefully..

---
 drivers/acpi/x86/s2idle.c         |  12 +-
 drivers/android/binder.c          |   4 +-
 drivers/media/pci/pt3/pt3.c       |   4 +-
 drivers/scsi/scsi_transport_spi.c |   7 +-
 fs/cifs/inode.c                   |   4 +-
 fs/cifs/transport.c               |   5 +-
 fs/coredump.c                     |   5 +-
 fs/nfs/file.c                     |   3 +-
 fs/nfs/inode.c                    |  12 +-
 fs/nfs/nfs3proc.c                 |   3 +-
 fs/nfs/nfs4proc.c                 |  14 +--
 fs/nfs/nfs4state.c                |   3 +-
 fs/nfs/pnfs.c                     |   4 +-
 fs/xfs/xfs_trans_ail.c            |   8 +-
 include/linux/completion.h        |   1 +
 include/linux/freezer.h           | 244 ++------------------------------------
 include/linux/sched.h             |  49 ++++----
 include/linux/sched/jobctl.h      |   8 ++
 include/linux/sched/signal.h      |  15 ++-
 include/linux/sunrpc/sched.h      |   7 +-
 include/linux/suspend.h           |   8 +-
 include/linux/umh.h               |   9 +-
 include/linux/wait.h              |  40 ++++++-
 init/do_mounts_initrd.c           |  10 +-
 kernel/cgroup/legacy_freezer.c    |  23 ++--
 kernel/exit.c                     |   4 +-
 kernel/fork.c                     |   5 +-
 kernel/freezer.c                  | 139 ++++++++++++++++------
 kernel/futex/waitwake.c           |   8 +-
 kernel/hung_task.c                |   4 +-
 kernel/power/hibernate.c          |  35 ++++--
 kernel/power/main.c               |  18 +--
 kernel/power/process.c            |  10 +-
 kernel/power/suspend.c            |  12 +-
 kernel/power/user.c               |  24 ++--
 kernel/ptrace.c                   | 185 +++++++++++++++++++++++------
 kernel/sched/completion.c         |   9 ++
 kernel/sched/core.c               |  24 ++--
 kernel/signal.c                   |  23 ++--
 kernel/time/hrtimer.c             |   4 +-
 kernel/umh.c                      |  18 ++-
 mm/khugepaged.c                   |   4 +-
 net/sunrpc/sched.c                |  12 +-
 net/unix/af_unix.c                |   8 +-
 44 files changed, 541 insertions(+), 507 deletions(-)


             reply	other threads:[~2022-04-12 12:31 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-12 11:44 Peter Zijlstra [this message]
2022-04-12 11:44 ` [PATCH 1/5] sched,signal,ptrace: Rework TASK_TRACED, TASK_STOPPED state Peter Zijlstra
2022-04-13 13:29   ` Oleg Nesterov
2022-04-13 16:47     ` Peter Zijlstra
2022-04-12 11:44 ` [PATCH 2/5] sched,ptrace: Fix ptrace_check_attach() vs PREEMPT_RT Peter Zijlstra
2022-04-13 13:24   ` Oleg Nesterov
2022-04-13 16:58     ` Peter Zijlstra
2022-04-13 18:57     ` Oleg Nesterov
2022-04-13 18:59       ` Oleg Nesterov
2022-04-13 19:20         ` Peter Zijlstra
2022-04-13 19:56           ` Peter Zijlstra
2022-04-14 11:54             ` Oleg Nesterov
2022-04-14 12:08               ` Oleg Nesterov
2022-04-14 18:34               ` Oleg Nesterov
2022-04-14 22:45                 ` Peter Zijlstra
2022-04-15 10:16                   ` Oleg Nesterov
2022-04-15 10:57                     ` Oleg Nesterov
2022-04-15 12:01                       ` Peter Zijlstra
2022-04-18 17:01                         ` Oleg Nesterov
2022-04-18 17:19                           ` Oleg Nesterov
2022-04-20 13:17                           ` Peter Zijlstra
2022-04-20 18:03                             ` Oleg Nesterov
2022-04-20 20:54                               ` [RFC][PATCH] ptrace: Don't change __state Eric W. Biederman
2022-04-21  7:21                                 ` Peter Zijlstra
2022-04-21 10:26                                   ` Peter Zijlstra
2022-04-21 10:49                                     ` Oleg Nesterov
2022-04-21 11:50                                       ` Peter Zijlstra
2022-04-21 14:45                                   ` Eric W. Biederman
2022-04-21  9:46                                 ` Oleg Nesterov
2022-04-21 15:01                                   ` Eric W. Biederman
2022-04-27  0:51                                 ` [ptrace] [confidence: ] 7d3fafb751: BUG:sleeping_function_called_from_invalid_context_at_arch/x86/entry/common.c kernel test robot
2022-04-20 10:20                       ` [PATCH 2/5] sched,ptrace: Fix ptrace_check_attach() vs PREEMPT_RT Peter Zijlstra
2022-04-20 11:35                         ` Oleg Nesterov
2022-04-15 12:00                     ` Peter Zijlstra
2022-04-15 12:56                       ` Oleg Nesterov
2022-04-12 11:44 ` [PATCH 3/5] freezer: Have {,un}lock_system_sleep() save/restore flags Peter Zijlstra
2022-04-12 11:44 ` [PATCH 4/5] freezer,umh: Clean up freezer/initrd interaction Peter Zijlstra
2022-04-12 11:44 ` [PATCH 5/5] freezer,sched: Rewrite core freezer logic Peter Zijlstra

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