[GIT PULL] cgroup changes for v5.14-rc1

[GIT PULL] cgroup changes for v5.14-rc1

[Tejun Heo]

Hello, Linus.

* cgroup.kill is added which implements atomic killing of the whole subtree.
  Down the line, this should be able to replace the multiple userland
  implementations of "keep killing till empty".

* PSI can now be turned off at boot time to avoid overhead for
  configurations which don't care about PSI.

Thank you.

The following changes since commit 08b2b6fdf6b26032f025084ce2893924a0cdb4a2:

  cgroup: fix spelling mistakes (2021-05-24 12:45:26 -0400)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-5.14

for you to fetch changes up to 3958e2d0c34e18c41b60dc01832bd670a59ef70f:

  cgroup: make per-cgroup pressure stall tracking configurable (2021-06-08 14:59:02 -0400)

----------------------------------------------------------------
Christian Brauner (5):
      cgroup: introduce cgroup.kill
      docs/cgroup: add entry for cgroup.kill
      tests/cgroup: use cgroup.kill in cg_killall()
      tests/cgroup: move cg_wait_for(), cg_prepare_for_wait()
      tests/cgroup: test cgroup.kill

Roman Gushchin (1):
      cgroup: inline cgroup_task_freeze()

Suren Baghdasaryan (1):
      cgroup: make per-cgroup pressure stall tracking configurable

Tejun Heo (1):
      Merge branch 'for-5.13-fixes' into for-5.14

Yang Li (1):
      cgroup: Fix kernel-doc

 Documentation/admin-guide/cgroup-v2.rst         |  15 ++
 Documentation/admin-guide/kernel-parameters.txt |   9 +-
 include/linux/cgroup-defs.h                     |   4 +
 include/linux/cgroup.h                          |  25 +-
 kernel/cgroup/cgroup.c                          | 180 ++++++++++++--
 kernel/cgroup/rstat.c                           |   2 +-
 kernel/sched/psi.c                              |  30 +--
 tools/testing/selftests/cgroup/.gitignore       |   3 +-
 tools/testing/selftests/cgroup/Makefile         |   2 +
 tools/testing/selftests/cgroup/cgroup_util.c    |  51 ++++
 tools/testing/selftests/cgroup/cgroup_util.h    |   2 +
 tools/testing/selftests/cgroup/test_freezer.c   |  57 -----
 tools/testing/selftests/cgroup/test_kill.c      | 297 ++++++++++++++++++++++++
 13 files changed, 569 insertions(+), 108 deletions(-)
 create mode 100644 tools/testing/selftests/cgroup/test_kill.c

-- 
tejun

[GIT PULL] cgroup changes for v5.14-rc1

[Tejun Heo]

Hello, Linus.

* cgroup.kill is added which implements atomic killing of the whole subtree.
  Down the line, this should be able to replace the multiple userland
  implementations of "keep killing till empty".

* PSI can now be turned off at boot time to avoid overhead for
  configurations which don't care about PSI.

Thank you.

The following changes since commit 08b2b6fdf6b26032f025084ce2893924a0cdb4a2:

  cgroup: fix spelling mistakes (2021-05-24 12:45:26 -0400)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-5.14

for you to fetch changes up to 3958e2d0c34e18c41b60dc01832bd670a59ef70f:

  cgroup: make per-cgroup pressure stall tracking configurable (2021-06-08 14:59:02 -0400)

----------------------------------------------------------------
Christian Brauner (5):
      cgroup: introduce cgroup.kill
      docs/cgroup: add entry for cgroup.kill
      tests/cgroup: use cgroup.kill in cg_killall()
      tests/cgroup: move cg_wait_for(), cg_prepare_for_wait()
      tests/cgroup: test cgroup.kill

Roman Gushchin (1):
      cgroup: inline cgroup_task_freeze()

Suren Baghdasaryan (1):
      cgroup: make per-cgroup pressure stall tracking configurable

Tejun Heo (1):
      Merge branch 'for-5.13-fixes' into for-5.14

Yang Li (1):
      cgroup: Fix kernel-doc

 Documentation/admin-guide/cgroup-v2.rst         |  15 ++
 Documentation/admin-guide/kernel-parameters.txt |   9 +-
 include/linux/cgroup-defs.h                     |   4 +
 include/linux/cgroup.h                          |  25 +-
 kernel/cgroup/cgroup.c                          | 180 ++++++++++++--
 kernel/cgroup/rstat.c                           |   2 +-
 kernel/sched/psi.c                              |  30 +--
 tools/testing/selftests/cgroup/.gitignore       |   3 +-
 tools/testing/selftests/cgroup/Makefile         |   2 +
 tools/testing/selftests/cgroup/cgroup_util.c    |  51 ++++
 tools/testing/selftests/cgroup/cgroup_util.h    |   2 +
 tools/testing/selftests/cgroup/test_freezer.c   |  57 -----
 tools/testing/selftests/cgroup/test_kill.c      | 297 ++++++++++++++++++++++++
 13 files changed, 569 insertions(+), 108 deletions(-)
 create mode 100644 tools/testing/selftests/cgroup/test_kill.c

-- 
tejun

Re: [GIT PULL] cgroup changes for v5.14-rc1

[Linus Torvalds]

On Thu, Jul 1, 2021 at 1:55 PM Tejun Heo <tj@kernel.org> wrote:
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-5.14

I've pulled it, but let me vent about this history a bit.

Look at commit c2a11971549b ("Merge branch 'for-5.13-fixes' into for-5.14").

Now tell me how that commit explains why it exists.

Merge commits need commit messages too.

In particular, they need commit messages that *explain* why they exist
in the first place, not just a one-liner that says what it does (and
does so badly at that).

                    Linus

Re: [GIT PULL] cgroup changes for v5.14-rc1

[Linus Torvalds]

On Thu, Jul 1, 2021 at 1:55 PM Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-5.14

I've pulled it, but let me vent about this history a bit.

Look at commit c2a11971549b ("Merge branch 'for-5.13-fixes' into for-5.14").

Now tell me how that commit explains why it exists.

Merge commits need commit messages too.

In particular, they need commit messages that *explain* why they exist
in the first place, not just a one-liner that says what it does (and
does so badly at that).

                    Linus

Re: [GIT PULL] cgroup changes for v5.14-rc1

[Tejun Heo]

Hello,

On Thu, Jul 01, 2021 at 05:25:59PM -0700, Linus Torvalds wrote:
> On Thu, Jul 1, 2021 at 1:55 PM Tejun Heo <tj@kernel.org> wrote:
> >
> >   git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-5.14
> 
> I've pulled it, but let me vent about this history a bit.
> 
> Look at commit c2a11971549b ("Merge branch 'for-5.13-fixes' into for-5.14").
> 
> Now tell me how that commit explains why it exists.
> 
> Merge commits need commit messages too.
> 
> In particular, they need commit messages that *explain* why they exist
> in the first place, not just a one-liner that says what it does (and
> does so badly at that).

for-5.13-fixes had comment updates across the file and I pulled them into
for-5.14 to avoid trivial context conflicts down the line. Yeah, I should
have commented on the rationale. Will add explanations from now on.

Thanks.

-- 
tejun

Re: [GIT PULL] cgroup changes for v5.14-rc1

[Tejun Heo]

Hello,

On Thu, Jul 01, 2021 at 05:25:59PM -0700, Linus Torvalds wrote:
> On Thu, Jul 1, 2021 at 1:55 PM Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
> >
> >   git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-5.14
> 
> I've pulled it, but let me vent about this history a bit.
> 
> Look at commit c2a11971549b ("Merge branch 'for-5.13-fixes' into for-5.14").
> 
> Now tell me how that commit explains why it exists.
> 
> Merge commits need commit messages too.
> 
> In particular, they need commit messages that *explain* why they exist
> in the first place, not just a one-liner that says what it does (and
> does so badly at that).

for-5.13-fixes had comment updates across the file and I pulled them into
for-5.14 to avoid trivial context conflicts down the line. Yeah, I should
have commented on the rationale. Will add explanations from now on.

Thanks.

-- 
tejun

Re: [GIT PULL] cgroup changes for v5.14-rc1

[pr-tracker-bot]

The pull request you sent on Thu, 1 Jul 2021 10:55:40 -1000:

> git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-5.14

has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/3dbdb38e286903ec220aaf1fb29a8d94297da246

Thank you!

-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/prtracker.html

Re: [GIT PULL] cgroup changes for v5.14-rc1

[pr-tracker-bot-DgEjT+Ai2ygdnm+yROfE0A]

The pull request you sent on Thu, 1 Jul 2021 10:55:40 -1000:

> git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-5.14

has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/3dbdb38e286903ec220aaf1fb29a8d94297da246

Thank you!

-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/prtracker.html