Eric Lee / linux-smarc-t335x-v3.2

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Commit 61cbe54d9479ad98283b2dda686deae4c34b2d59

Authored by Mike Galbraith
Committed by Ingo Molnar
1 parent 172e082a91
Exists in master and in 4 other branches v3.2_AM335xPSP_04.06.00.11, v3.2_NEWT335xPSP_04.06.00.11, v3.2_SBC_SMARTMEN, v3.2_SMARCT335xPSP_04.06.00.11

sched: Keep kthreads at default priority 

Removes kthread/workqueue priority boost, they increase worst-case
desktop latencies.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1252486344.28645.18.camel@marge.simson.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

Showing 2 changed files with 0 additions and 6 deletions Side-by-side Diff

... ... @@ -16,8 +16,6 @@
16 16 #include <linux/mutex.h>
17 17 #include <trace/events/sched.h>
18 18  
19   -#define KTHREAD_NICE_LEVEL (-5)
20   -
21 19 static DEFINE_SPINLOCK(kthread_create_lock);
22 20 static LIST_HEAD(kthread_create_list);
23 21 struct task_struct *kthreadd_task;
... ... @@ -145,7 +143,6 @@
145 143 * The kernel thread should not inherit these properties.
146 144 */
147 145 sched_setscheduler_nocheck(create.result, SCHED_NORMAL, &param);
148   - set_user_nice(create.result, KTHREAD_NICE_LEVEL);
149 146 set_cpus_allowed_ptr(create.result, cpu_all_mask);
150 147 }
151 148 return create.result;
... ... @@ -221,7 +218,6 @@
221 218 /* Setup a clean context for our children to inherit. */
222 219 set_task_comm(tsk, "kthreadd");
223 220 ignore_signals(tsk);
224   - set_user_nice(tsk, KTHREAD_NICE_LEVEL);
225 221 set_cpus_allowed_ptr(tsk, cpu_all_mask);
226 222 set_mems_allowed(node_possible_map);
227 223  
... ... @@ -317,8 +317,6 @@
317 317 if (cwq->wq->freezeable)
318 318 set_freezable();
319 319  
320   - set_user_nice(current, -5);
321   -
322 320 for (;;) {
323 321 prepare_to_wait(&cwq->more_work, &wait, TASK_INTERRUPTIBLE);
324 322 if (!freezing(current) &&