Date: Tue, 24 Feb 2004 12:43:34 +0900 From: Jun Kuriyama <kuriyama@imgsrc.co.jp> To: cg@FreeBSD.org Cc: Current <freebsd-current@FreeBSD.org> Subject: exclusive sleep mutex pcm0 (sound cdev) r = 0 Message-ID: <7mwu6dgn15.wl@black.imgsrc.co.jp>
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I got this warning on my current box:
malloc() of "256" with the following non-sleepable locks held:
exclusive sleep mutex pcm0 (sound cdev) r = 0 (0xc73e63c0) locked @ dev/sound/pcm/dsp.c:213
I think there is no need to wait in vchan_create(). If kernel does
not have resources to return small 256 bytes memory for sound device,
we are not in the situation to care whether sound is played correctly
or not...
Index: vchan.c
===================================================================
RCS file: /home/ncvs/src/sys/dev/sound/pcm/vchan.c,v
retrieving revision 1.16
diff -u -r1.16 vchan.c
--- vchan.c 28 Jan 2004 08:02:15 -0000 1.16
+++ vchan.c 24 Feb 2004 03:35:19 -0000
@@ -255,7 +255,7 @@
CHN_UNLOCK(parent);
- pce = malloc(sizeof(*pce), M_DEVBUF, M_WAITOK | M_ZERO);
+ pce = malloc(sizeof(*pce), M_DEVBUF, M_NOWAIT | M_ZERO);
if (!pce) {
CHN_LOCK(parent);
return ENOMEM;
--
Jun Kuriyama <kuriyama@imgsrc.co.jp> // IMG SRC, Inc.
<kuriyama@FreeBSD.org> // FreeBSD Project
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