summaryrefslogtreecommitdiff
path: root/include/linux/sched.h
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2019-09-17 12:35:15 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-17 12:35:15 -0700
commit7f2444d38f6bbfa12bc15e2533d8f9daa85ca02b (patch)
tree6506ec79036890edfd9797b001391a350b5ac10f /include/linux/sched.h
parentc5f12fdb8bd873aa3ffdb79512e6bdac92b257b0 (diff)
parent77b4b5420422fc037d00b8f3f0e89b2262e4ae29 (diff)
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core timer updates from Thomas Gleixner: "Timers and timekeeping updates: - A large overhaul of the posix CPU timer code which is a preparation for moving the CPU timer expiry out into task work so it can be properly accounted on the task/process. An update to the bogus permission checks will come later during the merge window as feedback was not complete before heading of for travel. - Switch the timerqueue code to use cached rbtrees and get rid of the homebrewn caching of the leftmost node. - Consolidate hrtimer_init() + hrtimer_init_sleeper() calls into a single function - Implement the separation of hrtimers to be forced to expire in hard interrupt context even when PREEMPT_RT is enabled and mark the affected timers accordingly. - Implement a mechanism for hrtimers and the timer wheel to protect RT against priority inversion and live lock issues when a (hr)timer which should be canceled is currently executing the callback. Instead of infinitely spinning, the task which tries to cancel the timer blocks on a per cpu base expiry lock which is held and released by the (hr)timer expiry code. - Enable the Hyper-V TSC page based sched_clock for Hyper-V guests resulting in faster access to timekeeping functions. - Updates to various clocksource/clockevent drivers and their device tree bindings. - The usual small improvements all over the place" * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (101 commits) posix-cpu-timers: Fix permission check regression posix-cpu-timers: Always clear head pointer on dequeue hrtimer: Add a missing bracket and hide `migration_base' on !SMP posix-cpu-timers: Make expiry_active check actually work correctly posix-timers: Unbreak CONFIG_POSIX_TIMERS=n build tick: Mark sched_timer to expire in hard interrupt context hrtimer: Add kernel doc annotation for HRTIMER_MODE_HARD x86/hyperv: Hide pv_ops access for CONFIG_PARAVIRT=n posix-cpu-timers: Utilize timerqueue for storage posix-cpu-timers: Move state tracking to struct posix_cputimers posix-cpu-timers: Deduplicate rlimit handling posix-cpu-timers: Remove pointless comparisons posix-cpu-timers: Get rid of 64bit divisions posix-cpu-timers: Consolidate timer expiry further posix-cpu-timers: Get rid of zero checks rlimit: Rewrite non-sensical RLIMIT_CPU comment posix-cpu-timers: Respect INFINITY for hard RTTIME limit posix-cpu-timers: Switch thread group sampling to array posix-cpu-timers: Restructure expiry array posix-cpu-timers: Remove cputime_expires ...
Diffstat (limited to 'include/linux/sched.h')
-rw-r--r--include/linux/sched.h29
1 files changed, 4 insertions, 25 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index f0edee94834a..b75b28287005 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -25,9 +25,11 @@
#include <linux/resource.h>
#include <linux/latencytop.h>
#include <linux/sched/prio.h>
+#include <linux/sched/types.h>
#include <linux/signal_types.h>
#include <linux/mm_types_task.h>
#include <linux/task_io_accounting.h>
+#include <linux/posix-timers.h>
#include <linux/rseq.h>
/* task_struct member predeclarations (sorted alphabetically): */
@@ -244,27 +246,6 @@ struct prev_cputime {
#endif
};
-/**
- * struct task_cputime - collected CPU time counts
- * @utime: time spent in user mode, in nanoseconds
- * @stime: time spent in kernel mode, in nanoseconds
- * @sum_exec_runtime: total time spent on the CPU, in nanoseconds
- *
- * This structure groups together three kinds of CPU time that are tracked for
- * threads and thread groups. Most things considering CPU time want to group
- * these counts together and treat all three of them in parallel.
- */
-struct task_cputime {
- u64 utime;
- u64 stime;
- unsigned long long sum_exec_runtime;
-};
-
-/* Alternate field names when used on cache expirations: */
-#define virt_exp utime
-#define prof_exp stime
-#define sched_exp sum_exec_runtime
-
enum vtime_state {
/* Task is sleeping or running in a CPU with VTIME inactive: */
VTIME_INACTIVE = 0,
@@ -881,10 +862,8 @@ struct task_struct {
unsigned long min_flt;
unsigned long maj_flt;
-#ifdef CONFIG_POSIX_TIMERS
- struct task_cputime cputime_expires;
- struct list_head cpu_timers[3];
-#endif
+ /* Empty if CONFIG_POSIX_CPUTIMERS=n */
+ struct posix_cputimers posix_cputimers;
/* Process credentials: */