Date: Sun, 25 Apr 2010 11:30:04 GMT From: Alexander Best <alexbestms@wwu.de> To: freebsd-multimedia@FreeBSD.org Subject: Re: kern/146031: [snd_hda] race condition when kldunload snd_hda sound called Message-ID: <201004251130.o3PBU4NL036472@freefall.freebsd.org>
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The following reply was made to PR kern/146031; it has been noted by GNATS. From: Alexander Best <alexbestms@wwu.de> To: Garrett Cooper <gcooper@FreeBSD.org> Cc: <bug-followup@FreeBSD.org> Subject: Re: kern/146031: [snd_hda] race condition when kldunload snd_hda sound called Date: Sun, 25 Apr 2010 13:26:33 +0200 (CEST) running sh -c 'i=1; while [ 1 ] ; do echo "Try $i"; kldload snd_hda; kldunload snd_hda sound; : $(( i += 1 )); done' complains about sound.ko not being loaded, since unloading snd_hda.ko also unloads sound.ko. is this what you got too? i'm not sure this logic is correct. loading snd_hda.ko also loads sound.ko, since it depends on it. however i don't see why unloading snd_hda.ko also unloads sound.ko, since sound.ko has no dependencies and can exist without any snd_*.ko module. i wasn't able to trigger the panic however (command cancelled with i=350 or so). i'm running 9-CURRENT (r207154). -- Alexander Best
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