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| author | Ingo Molnar <mingo@kernel.org> | 2016-11-11 08:27:11 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-11-11 08:27:11 +0100 |
| commit | bfdd5537dcc857eaa04c055ef8afcb8a80dea831 (patch) | |
| tree | 6336969fb04fcd0db4bcbef529f318a86dc9f7c8 /kernel/sched/core.c | |
| parent | a225023828038a1aaea876a65313c863ec23fa44 (diff) | |
| parent | 27bcd37e0240bbe33f0efe244b5aad52104115b3 (diff) | |
| download | linux-bfdd5537dcc857eaa04c055ef8afcb8a80dea831.tar.gz linux-bfdd5537dcc857eaa04c055ef8afcb8a80dea831.tar.bz2 linux-bfdd5537dcc857eaa04c055ef8afcb8a80dea831.zip | |
Merge branch 'linus' into sched/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/core.c')
| -rw-r--r-- | kernel/sched/core.c | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index b8c86ba44ca9..f3cfa0dd5b34 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5193,21 +5193,14 @@ void sched_show_task(struct task_struct *p) int ppid; unsigned long state = p->state; + if (!try_get_task_stack(p)) + return; if (state) state = __ffs(state) + 1; printk(KERN_INFO "%-15.15s %c", p->comm, state < sizeof(stat_nam) - 1 ? stat_nam[state] : '?'); -#if BITS_PER_LONG == 32 - if (state == TASK_RUNNING) - printk(KERN_CONT " running "); - else - printk(KERN_CONT " %08lx ", thread_saved_pc(p)); -#else if (state == TASK_RUNNING) printk(KERN_CONT " running task "); - else - printk(KERN_CONT " %016lx ", thread_saved_pc(p)); -#endif #ifdef CONFIG_DEBUG_STACK_USAGE free = stack_not_used(p); #endif @@ -5222,6 +5215,7 @@ void sched_show_task(struct task_struct *p) print_worker_info(KERN_INFO, p); show_stack(p, NULL); + put_task_stack(p); } void show_state_filter(unsigned long state_filter) @@ -7516,11 +7510,27 @@ static struct kmem_cache *task_group_cache __read_mostly; DECLARE_PER_CPU(cpumask_var_t, load_balance_mask); DECLARE_PER_CPU(cpumask_var_t, select_idle_mask); +#define WAIT_TABLE_BITS 8 +#define WAIT_TABLE_SIZE (1 << WAIT_TABLE_BITS) +static wait_queue_head_t bit_wait_table[WAIT_TABLE_SIZE] __cacheline_aligned; + +wait_queue_head_t *bit_waitqueue(void *word, int bit) +{ + const int shift = BITS_PER_LONG == 32 ? 5 : 6; + unsigned long val = (unsigned long)word << shift | bit; + + return bit_wait_table + hash_long(val, WAIT_TABLE_BITS); +} +EXPORT_SYMBOL(bit_waitqueue); + void __init sched_init(void) { int i, j; unsigned long alloc_size = 0, ptr; + for (i = 0; i < WAIT_TABLE_SIZE; i++) + init_waitqueue_head(bit_wait_table + i); + #ifdef CONFIG_FAIR_GROUP_SCHED alloc_size += 2 * nr_cpu_ids * sizeof(void **); #endif |