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Don't bother exiting storming mode once a second to see if it has gone

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away, instead only exit storming mode when an interrupt stops firing long
enough for the ithread to exit the loop and go back to sleep.

Tested by:	macrus (cruder version)
This commit is contained in:
John Baldwin 2004-11-17 14:39:41 +00:00
parent 8b099b734b
commit d0b4135e00
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=137818
1 changed files with 6 additions and 12 deletions
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18
sys/kern/kern_intr.c
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@ -554,22 +554,14 @@ ithread_loop(void *arg)
*
* If this interrupt source is currently storming,
* then throttle it to only fire the handler once
* per clock tick. Each second we go out of storming
* mode to see if the storm has subsided.
* per clock tick.
*
* If this interrupt source is not currently
* storming, but the number of back to back
* interrupts exceeds the storm threshold, then
* enter storming mode.
*/
if (storming) {
tsleep(&count, td->td_priority, "istorm", 1);
if (count > hz) {
storming = 0;
count = 0;
} else
count++;
} else if (intr_storm_threshold != 0 &&
if (!storming && intr_storm_threshold != 0 &&
count >= intr_storm_threshold) {
if (!warned) {
printf(
@ -578,8 +570,10 @@ ithread_loop(void *arg)
warned = 1;
}
storming = 1;
count = 0;
} else
}
if (storming)
tsleep(&count, td->td_priority, "istorm", 1);
else
count++;
if (ithd->it_enable != NULL)