* [GIT PULL] cgroup changes for v5.20-rc1
@ 2022-08-01 17:05 ` Tejun Heo
0 siblings, 0 replies; 4+ messages in thread
From: Tejun Heo @ 2022-08-01 17:05 UTC (permalink / raw)
To: Linus Torvalds; +Cc: linux-kernel, cgroups, Zefan Li, Johannes Weiner
The following changes since commit e71e60cd74df9386c3f684c54888f2367050b831:
Merge tag 'dma-mapping-5.19-2022-06-06' of git://git.infradead.org/users/hch/dma-mapping (2022-06-06 17:56:18 -0700)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git/ tags/cgroup-for-5.20
for you to fetch changes up to 265792d0dede9259f0ca56bb3efcc23eceee7d01:
cgroup: Skip subtree root in cgroup_update_dfl_csses() (2022-07-28 07:26:30 -1000)
----------------------------------------------------------------
Several core optimizations:
* threadgroup_rwsem write locking is skipped when configuring controllers in
empty subtrees. Combined with CLONE_INTO_CGROUP, this allows the common
static usage pattern to not grab threadgroup_rwsem at all (glibc still
doesn't seem ready for CLONE_INTO_CGROUP unfortunately).
* threadgroup_rwsem used to be put into non-percpu mode by default due to
latency concerns in specific use cases. There's no reason for everyone
else to pay for it. Make the behavior optional.
* psi no longer allocates memory when disabled.
along with some code cleanups.
----------------------------------------------------------------
Chen Wandun (1):
psi: dont alloc memory for psi by default
Lin Feng (2):
cgroup.c: add helper __cset_cgroup_from_root to cleanup duplicated codes
cgroup.c: remove redundant check for mixable cgroup in cgroup_migrate_vet_dst
Tejun Heo (4):
cgroup: Elide write-locking threadgroup_rwsem when updating csses on an empty subtree
cgroup: Add "no" prefixed mount options
cgroup: Make !percpu threadgroup_rwsem operations optional
cgroup: remove "no" prefixed mount options
Waiman Long (1):
cgroup: Skip subtree root in cgroup_update_dfl_csses()
Documentation/admin-guide/cgroup-v2.rst | 8 ++
include/linux/cgroup-defs.h | 21 ++++-
include/linux/cgroup.h | 2 +-
init/Kconfig | 10 +++
kernel/cgroup/cgroup-internal.h | 1 +
kernel/cgroup/cgroup-v1.c | 17 +++-
kernel/cgroup/cgroup.c | 136 ++++++++++++++++++++------------
kernel/sched/psi.c | 19 +++--
8 files changed, 151 insertions(+), 63 deletions(-)
^ permalink raw reply [flat|nested] 4+ messages in thread
* [GIT PULL] cgroup changes for v5.20-rc1
@ 2022-08-01 17:05 ` Tejun Heo
0 siblings, 0 replies; 4+ messages in thread
From: Tejun Heo @ 2022-08-01 17:05 UTC (permalink / raw)
To: Linus Torvalds
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA,
cgroups-u79uwXL29TY76Z2rM5mHXA, Zefan Li, Johannes Weiner
The following changes since commit e71e60cd74df9386c3f684c54888f2367050b831:
Merge tag 'dma-mapping-5.19-2022-06-06' of git://git.infradead.org/users/hch/dma-mapping (2022-06-06 17:56:18 -0700)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git/ tags/cgroup-for-5.20
for you to fetch changes up to 265792d0dede9259f0ca56bb3efcc23eceee7d01:
cgroup: Skip subtree root in cgroup_update_dfl_csses() (2022-07-28 07:26:30 -1000)
----------------------------------------------------------------
Several core optimizations:
* threadgroup_rwsem write locking is skipped when configuring controllers in
empty subtrees. Combined with CLONE_INTO_CGROUP, this allows the common
static usage pattern to not grab threadgroup_rwsem at all (glibc still
doesn't seem ready for CLONE_INTO_CGROUP unfortunately).
* threadgroup_rwsem used to be put into non-percpu mode by default due to
latency concerns in specific use cases. There's no reason for everyone
else to pay for it. Make the behavior optional.
* psi no longer allocates memory when disabled.
along with some code cleanups.
----------------------------------------------------------------
Chen Wandun (1):
psi: dont alloc memory for psi by default
Lin Feng (2):
cgroup.c: add helper __cset_cgroup_from_root to cleanup duplicated codes
cgroup.c: remove redundant check for mixable cgroup in cgroup_migrate_vet_dst
Tejun Heo (4):
cgroup: Elide write-locking threadgroup_rwsem when updating csses on an empty subtree
cgroup: Add "no" prefixed mount options
cgroup: Make !percpu threadgroup_rwsem operations optional
cgroup: remove "no" prefixed mount options
Waiman Long (1):
cgroup: Skip subtree root in cgroup_update_dfl_csses()
Documentation/admin-guide/cgroup-v2.rst | 8 ++
include/linux/cgroup-defs.h | 21 ++++-
include/linux/cgroup.h | 2 +-
init/Kconfig | 10 +++
kernel/cgroup/cgroup-internal.h | 1 +
kernel/cgroup/cgroup-v1.c | 17 +++-
kernel/cgroup/cgroup.c | 136 ++++++++++++++++++++------------
kernel/sched/psi.c | 19 +++--
8 files changed, 151 insertions(+), 63 deletions(-)
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [GIT PULL] cgroup changes for v5.20-rc1
@ 2022-08-03 17:48 ` pr-tracker-bot-DgEjT+Ai2ygdnm+yROfE0A
0 siblings, 0 replies; 4+ messages in thread
From: pr-tracker-bot @ 2022-08-03 17:48 UTC (permalink / raw)
To: Tejun Heo
Cc: Linus Torvalds, linux-kernel, cgroups, Zefan Li, Johannes Weiner
The pull request you sent on Mon, 1 Aug 2022 07:05:59 -1000:
> git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git/ tags/cgroup-for-5.20
has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/b6bb70f9ab80a11161252bf217993d2c40ea5eb2
Thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/prtracker.html
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [GIT PULL] cgroup changes for v5.20-rc1
@ 2022-08-03 17:48 ` pr-tracker-bot-DgEjT+Ai2ygdnm+yROfE0A
0 siblings, 0 replies; 4+ messages in thread
From: pr-tracker-bot-DgEjT+Ai2ygdnm+yROfE0A @ 2022-08-03 17:48 UTC (permalink / raw)
To: Tejun Heo
Cc: Linus Torvalds, linux-kernel-u79uwXL29TY76Z2rM5mHXA,
cgroups-u79uwXL29TY76Z2rM5mHXA, Zefan Li, Johannes Weiner
The pull request you sent on Mon, 1 Aug 2022 07:05:59 -1000:
> git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git/ tags/cgroup-for-5.20
has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/b6bb70f9ab80a11161252bf217993d2c40ea5eb2
Thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/prtracker.html
^ permalink raw reply [flat|nested] 4+ messages in thread
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2022-08-01 17:05 [GIT PULL] cgroup changes for v5.20-rc1 Tejun Heo
2022-08-01 17:05 ` Tejun Heo
2022-08-03 17:48 ` pr-tracker-bot
2022-08-03 17:48 ` pr-tracker-bot-DgEjT+Ai2ygdnm+yROfE0A
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