Module Name: src
Committed By: nat
Date: Sat Jan 6 23:15:36 UTC 2018
Modified Files:
src/sys/dev: audio.c
Log Message:
Only signal a pause change on a transition of a pause change.
This addresses a problem found in audio/sox causing high cpu usage.
Path and analysis by Onno van der Linden.
To generate a diff of this commit:
cvs rdiff -u -r1.446 -r1.447 src/sys/dev/audio.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/dev/audio.c
diff -u src/sys/dev/audio.c:1.446 src/sys/dev/audio.c:1.447
--- src/sys/dev/audio.c:1.446 Sat Jan 6 21:16:36 2018
+++ src/sys/dev/audio.c Sat Jan 6 23:15:36 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: audio.c,v 1.446 2018/01/06 21:16:36 nat Exp $ */
+/* $NetBSD: audio.c,v 1.447 2018/01/06 23:15:36 nat Exp $ */
/*-
* Copyright (c) 2016 Nathanial Sloss <nathanialsl...@yahoo.com.au>
@@ -148,7 +148,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.446 2018/01/06 21:16:36 nat Exp $");
+__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.447 2018/01/06 23:15:36 nat Exp $");
#ifdef _KERNEL_OPT
#include "audio.h"
@@ -4762,14 +4762,18 @@ audiosetinfo(struct audio_softc *sc, str
}
if (SPECIFIED_CH(p->pause)) {
- vc->sc_mpr.pause = p->pause;
pbus = !p->pause;
- pausechange = true;
+ if (pbus != !vc->sc_mpr.pause) {
+ vc->sc_mpr.pause = p->pause;
+ pausechange = true;
+ }
}
if (SPECIFIED_CH(r->pause)) {
- vc->sc_mrr.pause = r->pause;
rbus = !r->pause;
- pausechange = true;
+ if (rbus != !vc->sc_mrr.pause) {
+ vc->sc_mrr.pause = r->pause;
+ pausechange = true;
+ }
}
if (SPECIFIED(ai->mode)) {
