Fix ~42 single-word typos in scheduler code comments.
We have accumulated a few fun ones over the years. :-)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ben Segall <bsegall@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: linux-kernel@vger.kernel.org
#ifdef CONFIG_CPUSETS
/* Protected by ->alloc_lock: */
nodemask_t mems_allowed;
- /* Seqence number to catch updates: */
+ /* Sequence number to catch updates: */
seqcount_spinlock_t mems_allowed_seq;
int cpuset_mem_spread_rotor;
int cpuset_slab_spread_rotor;
* Otherwise it tries to create a semi stable clock from a mixture of other
* clocks, including:
*
- * - GTOD (clock monotomic)
+ * - GTOD (clock monotonic)
* - sched_clock()
* - explicit idle events
*
return -EINVAL;
/*
- * Likewise, bound things on the otherside by preventing insane quota
+ * Likewise, bound things on the other side by preventing insane quota
* periods. This also allows us to normalize in computing quota
* feasibility.
*/
/*
* We allow index == CPUACCT_STAT_NSTATS here to read
- * the sum of suages.
+ * the sum of usages.
*/
BUG_ON(index > CPUACCT_STAT_NSTATS);
/*
* Hold sg_policy->update_lock shortly to handle the case where:
- * incase sg_policy->next_freq is read here, and then updated by
+ * in case sg_policy->next_freq is read here, and then updated by
* sugov_deferred_update() just before work_in_progress is set to false
* here, we may miss queueing the new update.
*
* When looking at the vector, we need to read the counter,
* do a memory barrier, then read the mask.
*
- * Note: This is still all racey, but we can deal with it.
+ * Note: This is still all racy, but we can deal with it.
* Ideally, we only want to look at masks that are set.
*
* If a mask is not set, then the only thing wrong is that we
* The cost of this trade-off is not entirely clear and will probably
* be good for some workloads and bad for others.
*
- * The main idea here is that if some CPUs were overcommitted, we try
+ * The main idea here is that if some CPUs were over-committed, we try
* to spread which is what the scheduler traditionally did. Sys admins
* must do proper RT planning to avoid overloading the system if they
* really care.
/*
* If either stime or utime are 0, assume all runtime is userspace.
- * Once a task gets some ticks, the monotonicy code at 'update:'
+ * Once a task gets some ticks, the monotonicity code at 'update:'
* will ensure things converge to the observed ratio.
*/
if (stime == 0) {
p->dl.dl_non_contending = 0;
/*
* If the timer handler is currently running and the
- * timer cannot be cancelled, inactive_task_timer()
+ * timer cannot be canceled, inactive_task_timer()
* will see that dl_not_contending is not set, and
* will not touch the rq's active utilization,
* so we are still safe.
* fires.
*
* If the task wakes up again before the inactive timer fires,
- * the timer is cancelled, whereas if the task wakes up after the
+ * the timer is canceled, whereas if the task wakes up after the
* inactive timer fired (and running_bw has been decreased) the
* task's utilization has to be added to running_bw again.
* A flag in the deadline scheduling entity (dl_non_contending)
dl_se->dl_non_contending = 0;
/*
* If the timer handler is currently running and the
- * timer cannot be cancelled, inactive_task_timer()
+ * timer cannot be canceled, inactive_task_timer()
* will see that dl_not_contending is not set, and
* will not touch the rq's active utilization,
* so we are still safe.
* Since rq->dl.running_bw and rq->dl.this_bw contain utilizations
* multiplied by 2^BW_SHIFT, the result has to be shifted right by
* BW_SHIFT.
- * Since rq->dl.bw_ratio contains 1 / Umax multipled by 2^RATIO_SHIFT,
+ * Since rq->dl.bw_ratio contains 1 / Umax multiplied by 2^RATIO_SHIFT,
* dl_bw is multiped by rq->dl.bw_ratio and shifted right by RATIO_SHIFT.
* Since delta is a 64 bit variable, to have an overflow its value
* should be larger than 2^(64 - 20 - 8), which is more than 64 seconds.
p->dl.dl_non_contending = 0;
/*
* If the timer handler is currently running and the
- * timer cannot be cancelled, inactive_task_timer()
+ * timer cannot be canceled, inactive_task_timer()
* will see that dl_not_contending is not set, and
* will not touch the rq's active utilization,
* so we are still safe.
/*
* Default limits for DL period; on the top end we guard against small util
- * tasks still getting rediculous long effective runtimes, on the bottom end we
+ * tasks still getting ridiculously long effective runtimes, on the bottom end we
* guard against timer DoS.
*/
unsigned int sysctl_sched_dl_period_max = 1 << 22; /* ~4 seconds */
}
/*
- * This itererator needs some explanation.
+ * This iterator needs some explanation.
* It returns 1 for the header position.
* This means 2 is CPU 0.
* In a hotplugged system some CPUs, including CPU 0, may be missing so we have
return rss / nr_scan_pages;
}
-/* For sanitys sake, never scan more PTEs than MAX_SCAN_WINDOW MB/sec. */
+/* For sanity's sake, never scan more PTEs than MAX_SCAN_WINDOW MB/sec. */
#define MAX_SCAN_WINDOW 2560
static unsigned int task_scan_min(struct task_struct *p)
}
/*
- * Get rid of NUMA staticstics associated with a task (either current or dead).
+ * Get rid of NUMA statistics associated with a task (either current or dead).
* If @final is set, the task is dead and has reached refcount zero, so we can
* safely free all relevant data structures. Otherwise, there might be
* concurrent reads from places like load balancing and procfs, and we should
*
* abs(x) < y := (unsigned)(x + y - 1) < (2 * y - 1)
*
- * NOTE: this only works when value + maring < INT_MAX.
+ * NOTE: this only works when value + margin < INT_MAX.
*/
static inline bool within_margin(int value, int margin)
{
/*
* When bandwidth control is enabled, cfs might have been removed
* because of a parent been throttled but cfs->nr_running > 1. Try to
- * add it unconditionnally.
+ * add it unconditionally.
*/
if (cfs_rq->nr_running == 1 || cfs_bandwidth_used())
list_add_leaf_cfs_rq(cfs_rq);
* bits doesn't do much.
*/
-/* cpu online calback */
+/* cpu online callback */
static void __maybe_unused update_runtime_enabled(struct rq *rq)
{
struct task_group *tg;
/*
* This is possible from callers such as attach_tasks(), in which we
- * unconditionally check_prempt_curr() after an enqueue (which may have
+ * unconditionally check_preempt_curr() after an enqueue (which may have
* lead to a throttle). This both saves work and prevents false
* next-buddy nomination below.
*/
return 0;
}
- /* Record that we found atleast one task that could run on dst_cpu */
+ /* Record that we found at least one task that could run on dst_cpu */
env->flags &= ~LBF_ALL_PINNED;
if (task_running(env->src_rq, p)) {
* load to given_cpu. In rare situations, this may cause
* conflicts (balance_cpu and given_cpu/ilb_cpu deciding
* _independently_ and at _same_ time to move some load to
- * given_cpu) causing exceess load to be moved to given_cpu.
+ * given_cpu) causing excess load to be moved to given_cpu.
* This however should not happen so much in practice and
* moreover subsequent load balance cycles should correct the
* excess load moved.
/*
* newidle_balance() disregards balance intervals, so we could
* repeatedly reach this code, which would lead to balance_interval
- * skyrocketting in a short amount of time. Skip the balance_interval
+ * skyrocketing in a short amount of time. Skip the balance_interval
* increase logic to avoid that.
*/
if (env.idle == CPU_NEWLY_IDLE)
SCHED_FEAT(LAST_BUDDY, true)
/*
- * Consider buddies to be cache hot, decreases the likelyness of a
+ * Consider buddies to be cache hot, decreases the likeliness of a
* cache buddy being migrated away, increases cache locality.
*/
SCHED_FEAT(CACHE_HOT_BUDDY, true)
*
* NOTE: no locks or semaphores should be used here
*
- * On archs that support TIF_POLLING_NRFLAG, is called with polling
+ * On architectures that support TIF_POLLING_NRFLAG, is called with polling
* set, and it returns with polling set. If it ever stops polling, it
* must clear the polling bit.
*/
* Suspend-to-idle ("s2idle") is a system state in which all user space
* has been frozen, all I/O devices have been suspended and the only
* activity happens here and in interrupts (if any). In that case bypass
- * the cpuidle governor and go stratight for the deepest idle state
+ * the cpuidle governor and go straight for the deepest idle state
* available. Possibly also suspend the local tick and the entire
* timekeeping to prevent timer interrupts from kicking us out of idle
* until a proper wakeup interrupt happens.
* w:0 1 1 0 0 1 1 0 0
*
* This ensures we'll fold the old NO_HZ contribution in this window while
- * accumlating the new one.
+ * accumulating the new one.
*
* - When we wake up from NO_HZ during the window, we push up our
* contribution, since we effectively move our sample point to a known
* runnable = running = 0;
*
* clause from ___update_load_sum(); this results in
- * the below usage of @contrib to dissapear entirely,
+ * the below usage of @contrib to disappear entirely,
* so no point in calculating it.
*/
contrib = __accumulate_pelt_segments(periods,
* Reflecting stolen time makes sense only if the idle
* phase would be present at max capacity. As soon as the
* utilization of a rq has reached the maximum value, it is
- * considered as an always runnig rq without idle time to
+ * considered as an always running rq without idle time to
* steal. This potential idle time is considered as lost in
* this case. We keep track of this lost idle time compare to
* rq's clock_task.
* states, we would have to conclude a CPU SOME pressure number of
* 100%, since *somebody* is waiting on a runqueue at all
* times. However, that is clearly not the amount of contention the
- * workload is experiencing: only one out of 256 possible exceution
+ * workload is experiencing: only one out of 256 possible execution
* threads will be contended at any given time, or about 0.4%.
*
* Conversely, consider a scenario of 4 tasks and 4 CPUs where at any
* we have to base our calculation on the number of non-idle tasks in
* conjunction with the number of available CPUs, which is the number
* of potential execution threads. SOME becomes then the proportion of
- * delayed tasks to possibe threads, and FULL is the share of possible
+ * delayed tasks to possible threads, and FULL is the share of possible
* threads that are unproductive due to delays:
*
* threads = min(nr_nonidle_tasks, nr_cpus)
mutex_unlock(&group->avgs_lock);
}
-/* Trigger tracking window manupulations */
+/* Trigger tracking window manipulations */
static void window_reset(struct psi_window *win, u64 now, u64 value,
u64 prev_growth)
{
/*
* Either all rqs have inf runtime and there's nothing to steal
* or __disable_runtime() below sets a specific rq to inf to
- * indicate its been disabled and disalow stealing.
+ * indicate its been disabled and disallow stealing.
*/
if (iter->rt_runtime == RUNTIME_INF)
goto next;
*
* Each root domain has its own irq work function that can iterate over
* all CPUs with RT overloaded tasks. Since all CPUs with overloaded RT
- * tassk must be checked if there's one or many CPUs that are lowering
+ * task must be checked if there's one or many CPUs that are lowering
* their priority, there's a single irq work iterator that will try to
* push off RT tasks that are waiting to run.
*
/*
* There's a chance that p is higher in priority
* than what's currently running on its CPU.
- * This is just that p is wakeing up and hasn't
+ * This is just that p is waking up and hasn't
* had a chance to schedule. We only pull
* p if it is lower in priority than the
* current task on the run queue
*
* if (rq-clock_update_flags >= RQCF_UPDATED)
*
- * to check if %RQCF_UPADTED is set. It'll never be shifted more than
+ * to check if %RQCF_UPDATED is set. It'll never be shifted more than
* one position though, because the next rq_unpin_lock() will shift it
* back.
*/
/*
* See rt task throttling, which is the only time a skip
- * request is cancelled.
+ * request is canceled.
*/
static inline void rq_clock_cancel_skipupdate(struct rq *rq)
{
/*
* The switched_from() call is allowed to drop rq->lock, therefore we
- * cannot assume the switched_from/switched_to pair is serliazed by
+ * cannot assume the switched_from/switched_to pair is serialized by
* rq->lock. They are however serialized by p->pi_lock.
*/
void (*switched_from)(struct rq *this_rq, struct task_struct *task);
/*
* Returns the irqtime minus the softirq time computed by ksoftirqd.
- * Otherwise ksoftirqd's sum_exec_runtime is substracted its own runtime
+ * Otherwise ksoftirqd's sum_exec_runtime is subtracted its own runtime
* and never move forward.
*/
static inline u64 irq_time_read(int cpu)
}
/*
- * This itererator needs some explanation.
+ * This iterator needs some explanation.
* It returns 1 for the header position.
* This means 2 is cpu 0.
* In a hotplugged system some CPUs, including cpu 0, may be missing so we have
/* Number of sched domains in 'doms_cur': */
static int ndoms_cur;
-/* Attribues of custom domains in 'doms_cur' */
+/* Attributes of custom domains in 'doms_cur' */
static struct sched_domain_attr *dattr_cur;
/*
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