From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: [GIT PULL] cgroup changes for v5.2-rc1 Date: Thu, 9 May 2019 10:36:42 -0700 Message-ID: <20190509173642.GA374014@devbig004.ftw2.facebook.com> Mime-Version: 1.0 Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:mime-version :content-disposition:user-agent; bh=iom6SqE2pGkNK9Z5BBYeoQQuW8YcGD2ELbPKlGymboM=; b=cs0FXI2lpYwghUSDOf097f2v6Rt4diQmigrD+c/Xo1713L8qT08oedAGfjEbWsJUYJ Y4uKJTdVdNlH5L2MyZL/0C5q/QLyE+ubVYeRFqZX8QwccR9HwEcpxshclYF2cqqOMnBL ArKHoK9IiybB9p/TBSc6izdky9KEgTCNrSG3YfvQ5t+M1AsJdSrAr23HIhrXJJ8a1+OZ 6DiXvnfAxygTWRdUtaronQth1170tRMp467SFEcmAwqwIOvJSO9k64YUc5qLMAbbjhDT KLFHGOIbXHgb3WyyF+MGnwAIvJejG1ZOLF7KZ4/O+H7WoXMreTJzTS7OfgJbDsYUqCGA 9WDQ== Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Linus Torvalds Cc: linux-kernel@vger.kernel.org, Li Zefan , Johannes Weiner , cgroups@vger.kernel.org, Roman Gushchin , Oleg Nesterov Hello, Linus. This pull request includes Roman's cgroup2 freezer implementation. It's a separate machanism from cgroup1 freezer. Instead of blocking user tasks in arbitrary uninterruptible sleeps, the new implementation extends jobctl stop - frozen tasks are trapped in jobctl stop until thawed and can be killed and ptraced. Lots of thanks to Oleg for sheperding the effort. Other than that, there are a few trivial changes. Thanks. The following changes since commit 145f47c7381d43c789cbad55d4dbfd28fc6c46a4: Merge tag '5.1-rc3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6 (2019-04-03 20:21:25 -1000) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-5.2 for you to fetch changes up to f2b31bb598248c04721cb8485e6091a9feb045ac: cgroup: never call do_group_exit() with task->frozen bit set (2019-05-09 07:56:47 -0700) ---------------------------------------------------------------- Fuqian Huang (1): kernel: cgroup: fix misuse of %x Roman Gushchin (12): cgroup: rename freezer.c into legacy_freezer.c cgroup: implement __cgroup_task_count() helper cgroup: protect cgroup->nr_(dying_)descendants by css_set_lock cgroup: cgroup v2 freezer kselftests: cgroup: don't fail on cg_kill_all() error in cg_destroy() kselftests: cgroup: add freezer controller self-tests cgroup: make TRACE_CGROUP_PATH irq-safe cgroup: add tracing points for cgroup v2 freezer cgroup: document cgroup v2 freezer interface cgroup: prevent spurious transition into non-frozen state cgroup: get rid of cgroup_freezer_frozen_exit() cgroup: never call do_group_exit() with task->frozen bit set Shakeel Butt (1): cgroup: remove extra cgroup_migrate_finish() call Shaokun Zhang (1): cgroup: Remove unused cgrp variable Documentation/admin-guide/cgroup-v2.rst | 27 + include/linux/cgroup-defs.h | 33 + include/linux/cgroup.h | 43 ++ include/linux/sched.h | 2 + include/linux/sched/jobctl.h | 2 + include/trace/events/cgroup.h | 55 ++ kernel/cgroup/Makefile | 4 +- kernel/cgroup/cgroup-internal.h | 8 +- kernel/cgroup/cgroup-v1.c | 16 - kernel/cgroup/cgroup.c | 152 ++++- kernel/cgroup/debug.c | 8 +- kernel/cgroup/freezer.c | 639 +++++++------------ kernel/cgroup/legacy_freezer.c | 481 +++++++++++++++ kernel/fork.c | 2 + kernel/signal.c | 66 +- tools/testing/selftests/cgroup/.gitignore | 1 + tools/testing/selftests/cgroup/Makefile | 2 + tools/testing/selftests/cgroup/cgroup_util.c | 58 +- tools/testing/selftests/cgroup/cgroup_util.h | 5 + tools/testing/selftests/cgroup/test_freezer.c | 851 ++++++++++++++++++++++++++ 20 files changed, 2012 insertions(+), 443 deletions(-) create mode 100644 kernel/cgroup/legacy_freezer.c create mode 100644 tools/testing/selftests/cgroup/test_freezer.c -- tejun