forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

sched: convert nohz_cpu_mask to cpumask_var_t.

Browse source 
Impact: (future) size reduction for large NR_CPUS.

Dynamically allocating cpumasks (when CONFIG_CPUMASK_OFFSTACK) saves
space for small nr_cpu_ids but big CONFIG_NR_CPUS.  cpumask_var_t
is just a struct cpumask for !CONFIG_CPUMASK_OFFSTACK.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Rusty Russell 2008-11-25 02:35:04 +10:30 • committed by Ingo Molnar
commit 6a7b3dc344
4 changed files with 12 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/linux/sched.h
View file

@ -249,7 +249,7 @@ extern void init_idle_bootup_task(struct task_struct *idle);
extern int runqueue_is_locked(void);
extern void task_rq_unlock_wait(struct task_struct *p);
extern cpumask_t nohz_cpu_mask;
extern cpumask_var_t nohz_cpu_mask;
#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ)
extern int select_nohz_load_balancer(int cpu);
#else