A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-28 18:51:56 -04:00
Code Issues Projects Releases Packages Wiki Activity

softirq: defer softirq processing to ksoftirqd if CPU is busy with RT

Browse source 
Defer the softirq processing to ksoftirqd if a RT task is running
or queued on the current CPU. This complements the RT task placement
algorithm which tries to find a CPU that is not currently busy with
softirqs.

Currently NET_TX, NET_RX, BLOCK and TASKLET softirqs are only deferred
as they can potentially run for long time.

Change-Id: Id7665244af6bbd5a96d9e591cf26154e9eaa860c
Signed-off-by: Pavankumar Kondeti <[email protected]>
[[email protected]: trivial merge conflict resolution.]
Signed-off-by: Satya Durga Srinivasu Prabhala <[email protected]>
This commit is contained in:
Pavankumar Kondeti 2017-06-28 12:00:31 +05:30 • committed by Gerrit - the friendly Code Review server
commit db6940d546
3 changed files with 20 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

5
kernel/softirq.c
View file

@ -253,6 +253,8 @@ static inline bool lockdep_softirq_start(void) { return false; }
static inline void lockdep_softirq_end(bool in_hardirq) { }
#endif
#define long_softirq_pending() (local_softirq_pending() & LONG_SOFTIRQ_MASK)
#define defer_for_rt() (long_softirq_pending() && cpupri_check_rt())
asmlinkage __visible void __softirq_entry __do_softirq(void)
{
unsigned long end = jiffies + MAX_SOFTIRQ_TIME;
@ -317,6 +319,7 @@ restart:
pending = local_softirq_pending();
if (pending) {
if (time_before(jiffies, end) && !need_resched() &&
!defer_for_rt() &&
--max_restart)
goto restart;
@ -372,7 +375,7 @@ static inline void invoke_softirq(void)
if (ksoftirqd_running(local_softirq_pending()))
return;
if (!force_irqthreads) {
if (!force_irqthreads && !defer_for_rt()) {
#ifdef CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK
/*
* We can safely execute softirq on the current stack if