Patrick Bellasi
7274a5c1bb
sched/uclamp: Propagate system defaults to the root group ...
The clamp values are not tunable at the level of the root task group.
That's for two main reasons:
- the root group represents "system resources" which are always
entirely available from the cgroup standpoint.
- when tuning/restricting "system resources" makes sense, tuning must
be done using a system wide API which should also be available when
control groups are not.
When a system wide restriction is available, cgroups should be aware of
its value in order to know exactly how much "system resources" are
available for the subgroups.
Utilization clamping supports already the concepts of:
- system defaults: which define the maximum possible clamp values
usable by tasks.
- effective clamps: which allows a parent cgroup to constraint (maybe
temporarily) its descendants without losing the information related
to the values "requested" from them.
Exploit these two concepts and bind them together in such a way that,
whenever system default are tuned, the new values are propagated to
(possibly) restrict or relax the "effective" value of nested cgroups.
When cgroups are in use, force an update of all the RUNNABLE tasks.
Otherwise, keep things simple and do just a lazy update next time each
task will be enqueued.
Do that since we assume a more strict resource control is required when
cgroups are in use. This allows also to keep "effective" clamp values
updated in case we need to expose them to user-space.
Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Michal Koutny <mkoutny@suse.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Alessio Balsini <balsini@android.com>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Joel Fernandes <joelaf@google.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Morten Rasmussen <morten.rasmussen@arm.com>
Cc: Paul Turner <pjt@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Perret <quentin.perret@arm.com>
Cc: Rafael J . Wysocki <rafael.j.wysocki@intel.com>
Cc: Steve Muckle <smuckle@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Todd Kjos <tkjos@google.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lkml.kernel.org/r/20190822132811.31294-4-patrick.bellasi@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-09-03 09:17:38 +02:00
Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-07-20 10:45:15 -07:00
sched/core: Prevent race condition between cpuset and __sched_setscheduler()
2019-07-25 15:55:04 +02:00
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
dma-mapping fixes for 5.3-rc1
2019-07-20 12:09:52 -07:00
sched/core: Convert get_task_struct() to return the task
2019-07-25 15:51:54 +02:00
gcov: no need to check return value of debugfs_create functions
2019-06-03 16:18:12 +02:00
sched/core: Convert get_task_struct() to return the task
2019-07-25 15:51:54 +02:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching
2019-07-11 15:30:05 -07:00
sched/core: Convert get_task_struct() to return the task
2019-07-25 15:51:54 +02:00
pci-v5.3-changes
2019-07-15 20:44:49 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
rcu/tree: Fix SCHED_FIFO params
2019-08-08 09:09:30 +02:00
sched/uclamp: Propagate system defaults to the root group
2019-09-03 09:17:38 +02:00
timekeeping/vsyscall: Use __iter_div_u64_rem()
2019-07-10 20:37:49 +02:00
sched/core: Convert get_task_struct() to return the task
2019-07-25 15:51:54 +02:00
Provide in-kernel headers to make extending kernel easier
2019-04-29 16:48:03 +02:00
acct_on(): don't mess with freeze protection
2019-04-04 21:04:13 -04:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
audit/stable-5.3 PR 20190702
2019-07-08 18:55:42 -07:00
audit/stable-5.3 PR 20190702
2019-07-08 18:55:42 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
2019-05-30 11:26:37 -07:00
fsnotify: switch send_to_group() and ->handle_event to const struct qstr *
2019-04-26 13:51:03 -04:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
audit/stable-5.3 PR 20190702
2019-07-08 18:55:42 -07:00
audit: enforce op for string fields
2019-05-28 17:46:43 -04:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
kernel/configs: use .incbin directive to embed config_data.gz
2019-03-07 18:32:02 -08:00
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-07-08 10:39:56 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282
2019-06-05 17:36:37 +02:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230
2019-06-19 17:09:06 +02:00
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
request_key improvements
2019-07-08 19:19:37 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 25
2019-05-21 11:52:39 +02:00
pidfd: fix a poll race when setting exit_state
2019-07-22 16:02:03 +02:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
fail_function: no need to check return value of debugfs_create functions
2019-06-03 15:49:06 +02:00
sched/fair: Don't free p->numa_faults with concurrent readers
2019-07-25 15:37:04 +02:00
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
Linux 5.2-rc3
2019-06-03 11:50:18 +02:00
kheaders: include only headers into kheaders_data.tar.xz
2019-07-09 10:10:52 +09:00
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
mm/nvdimm: add is_ioremap_addr and use that to check ioremap address
2019-07-12 11:05:40 -07:00
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
jump_label: Batch updates if arch supports it
2019-06-17 12:09:22 +02:00
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
sched/rt, Kconfig: Unbreak def/oldconfig with CONFIG_PREEMPT=y
2019-07-22 18:05:11 +02:00
kcov: convert kcov.refcount to refcount_t
2019-03-07 18:32:02 -08:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230
2019-06-19 17:09:06 +02:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230
2019-06-19 17:09:06 +02:00
Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
2019-07-08 20:28:59 -07:00
kheaders: Move from proc to sysfs
2019-05-24 20:16:01 +02:00
The main changes in this release include:
2019-07-18 11:51:00 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 170
2019-05-30 11:26:39 -07:00
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
kheaders: Move from proc to sysfs
2019-05-24 20:16:01 +02:00
mm/devm_memremap_pages: enable sub-section remap
2019-07-18 17:08:07 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
Modules updates for v5.3
2019-07-18 12:06:57 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
padata: use smp_mb in padata_reorder to avoid orphaned padata jobs
2019-07-18 13:39:54 +08:00
docs: admin-guide: move sysctl directory to it
2019-07-15 11:03:01 -03:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
kernel/pid.c: convert struct pid count to refcount_t
2019-07-16 19:23:24 -07:00
proc/sysctl: add shared variables for range check
2019-07-18 17:08:07 -07:00
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
ptrace: add PTRACE_GET_SYSCALL_INFO request
2019-07-16 19:23:24 -07:00
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-03-12 13:27:20 -07:00
resource: avoid unnecessary lookups in find_next_iomem_res()
2019-07-18 17:08:06 -07:00
signal: Remove task parameter from force_sig
2019-05-27 09:36:28 -05:00
signal: Remove the signal number and task parameters from force_sig_info
2019-05-29 09:31:44 -05:00
signal: simplify set_user_sigmask/restore_user_sigmask
2019-07-16 19:23:24 -07:00
smp: Warn on function calls from softirq context
2019-07-20 11:27:16 +02:00
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-07-08 11:01:13 -07:00
stacktrace: Force USER_DS for stack_trace_save_user()
2019-07-18 16:47:24 +02:00
stop_machine: Fix stop_cpus_in_progress ordering
2019-08-08 09:09:30 +02:00
prctl_set_mm: downgrade mmap_sem to read lock
2019-06-01 15:51:31 -07:00
arch: handle arches who do not yet define clone3
2019-06-21 01:54:53 +02:00
proc/sysctl: add shared variables for range check
2019-07-18 17:08:07 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
2019-05-30 11:26:37 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 25
2019-05-21 11:52:39 +02:00
torture: Allow inter-stutter interval to be specified
2019-05-28 09:06:09 -07:00
The main changes in this release include:
2019-07-18 11:51:00 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
2019-05-30 11:26:37 -07:00
proc/sysctl: add shared variables for range check
2019-07-18 17:08:07 -07:00
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
smp: Remove smp_call_function() and on_each_cpu() return values
2019-06-23 14:26:26 +02:00
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
Keyrings namespacing
2019-07-08 19:36:47 -07:00
Keyrings namespacing
2019-07-08 19:36:47 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
watchdog: Fix typo in comment
2019-04-18 14:05:51 +02:00
kernel/watchdog_hld.c: hard lockup message should end with a newline
2019-04-19 09:46:05 -07:00
workqueue: Remove GPF argument from alloc_workqueue_attrs()
2019-06-27 14:12:19 -07:00
sched/core, workqueues: Distangle worker accounting from rq lock
2019-04-16 16:55:15 +02:00
7274a5c1bb