kybaaz/linux-xiaomi-chiron
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Scheduler updates:

Browse source 
- migrate_disable/enable() support which originates from the RT tree and
    is now a prerequisite for the new preemptible kmap_local() API which aims
    to replace kmap_atomic().
 
  - A fair amount of topology and NUMA related improvements
 
  - Improvements for the frequency invariant calculations
 
  - Enhanced robustness for the global CPU priority tracking and decision
    making
 
  - The usual small fixes and enhancements all over the place
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAl/XwK4THHRnbHhAbGlu
 dXRyb25peC5kZQAKCRCmGPVMDXSYoX28D/9cVrvziSQGfBfuQWnUiw8iOIq1QBa2
 Me+Tvenhfrlt7xU6rbP9ciFu7eTN+fS06m5uQPGI+t22WuJmHzbmw1bJVXfkvYfI
 /QoU+Hg7DkDAn1p7ZKXh0dRkV0nI9ixxSHl0E+Zf1ATBxCUMV2SO85flg6z/4qJq
 3VWUye0dmR7/bhtkIjv5rwce9v2JB2g1AbgYXYTW9lHVoUdGoMSdiZAF4tGyHLnx
 sJ6DMqQ+k+dmPyYO0z5MTzjW/fXit4n9w2e3z9TvRH/uBu58WSW1RBmQYX6aHBAg
 dhT9F4lvTs6lJY23x5RSFWDOv6xAvKF5a0xfb8UZcyH5EoLYrPRvm42a0BbjdeRa
 u0z7LbwIlKA+RFdZzFZWz8UvvO0ljyMjmiuqZnZ5dY9Cd80LSBuxrWeQYG0qg6lR
 Y2povhhCepEG+q8AXIe2YjHKWKKC1s/l/VY3CNnCzcd21JPQjQ4Z5eWGmHif5IED
 CntaeFFhZadR3w02tkX35zFmY3w4soKKrbI4EKWrQwd+cIEQlOSY7dEPI/b5BbYj
 MWAb3P4EG9N77AWTNmbhK4nN0brEYb+rBbCA+5dtNBVhHTxAC7OTWElJOC2O66FI
 e06dREjvwYtOkRUkUguWwErbIai2gJ2MH0VILV3hHoh64oRk7jjM8PZYnjQkdptQ
 Gsq0rJW5iiu/OQ==
 =Oz1V
 -----END PGP SIGNATURE-----

Merge tag 'sched-core-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler updates from Thomas Gleixner:

 - migrate_disable/enable() support which originates from the RT tree
   and is now a prerequisite for the new preemptible kmap_local() API
   which aims to replace kmap_atomic().

 - A fair amount of topology and NUMA related improvements

 - Improvements for the frequency invariant calculations

 - Enhanced robustness for the global CPU priority tracking and decision
   making

 - The usual small fixes and enhancements all over the place

* tag 'sched-core-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (61 commits)
  sched/fair: Trivial correction of the newidle_balance() comment
  sched/fair: Clear SMT siblings after determining the core is not idle
  sched: Fix kernel-doc markup
  x86: Print ratio freq_max/freq_base used in frequency invariance calculations
  x86, sched: Use midpoint of max_boost and max_P for frequency invariance on AMD EPYC
  x86, sched: Calculate frequency invariance for AMD systems
  irq_work: Optimize irq_work_single()
  smp: Cleanup smp_call_function*()
  irq_work: Cleanup
  sched: Limit the amount of NUMA imbalance that can exist at fork time
  sched/numa: Allow a floating imbalance between NUMA nodes
  sched: Avoid unnecessary calculation of load imbalance at clone time
  sched/numa: Rename nr_running and break out the magic number
  sched: Make migrate_disable/enable() independent of RT
  sched/topology: Condition EAS enablement on FIE support
  arm64: Rebuild sched domains on invariance status changes
  sched/topology,schedutil: Wrap sched domains rebuild
  sched/uclamp: Allow to reset a task uclamp constraint value
  sched/core: Fix typos in comments
  Documentation: scheduler: fix information on arch SD flags, sched_domain and sched_debug
  ...
This commit is contained in:
Linus Torvalds 2020-12-14 18:29:11 -08:00
commit adb35e8dc9
59 changed files with 1929 additions and 642 deletions
Download patch file Download diff file Expand all files Collapse all files

21
include/linux/kernel.h
View file

@ -204,6 +204,7 @@ extern int _cond_resched(void);
extern void ___might_sleep(const char *file, int line, int preempt_offset);
extern void __might_sleep(const char *file, int line, int preempt_offset);
extern void __cant_sleep(const char *file, int line, int preempt_offset);
extern void __cant_migrate(const char *file, int line);
/**
* might_sleep - annotation for functions that can sleep
@ -227,6 +228,18 @@ extern void __cant_sleep(const char *file, int line, int preempt_offset);
# define cant_sleep() \
do { __cant_sleep(__FILE__, __LINE__, 0); } while (0)
# define sched_annotate_sleep() (current->task_state_change = 0)
/**
* cant_migrate - annotation for functions that cannot migrate
*
* Will print a stack trace if executed in code which is migratable
*/
# define cant_migrate() \
do { \
if (IS_ENABLED(CONFIG_SMP)) \
__cant_migrate(__FILE__, __LINE__); \
} while (0)
/**
* non_block_start - annotate the start of section where sleeping is prohibited
*
@ -251,6 +264,7 @@ extern void __cant_sleep(const char *file, int line, int preempt_offset);
int preempt_offset) { }
# define might_sleep() do { might_resched(); } while (0)
# define cant_sleep() do { } while (0)
# define cant_migrate() do { } while (0)
# define sched_annotate_sleep() do { } while (0)
# define non_block_start() do { } while (0)
# define non_block_end() do { } while (0)
@ -258,13 +272,6 @@ extern void __cant_sleep(const char *file, int line, int preempt_offset);
#define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0)
#ifndef CONFIG_PREEMPT_RT
# define cant_migrate() cant_sleep()
#else
/* Placeholder for now */
# define cant_migrate() do { } while (0)
#endif
/**
* abs - return absolute value of an argument
* @x: the value. If it is unsigned type, it is converted to signed type first.