Date: Sun, 25 Apr 2010 23:40:04 GMT From: Garrett Cooper <gcooper@FreeBSD.org> To: freebsd-multimedia@FreeBSD.org Subject: Re: kern/146031: [snd_hda] race condition when kldunload snd_hda sound called Message-ID: <201004252340.o3PNe4QA070567@freefall.freebsd.org>
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The following reply was made to PR kern/146031; it has been noted by GNATS. From: Garrett Cooper <gcooper@FreeBSD.org> To: Alexander Best <alexbestms@wwu.de> Cc: bug-followup@freebsd.org Subject: Re: kern/146031: [snd_hda] race condition when kldunload snd_hda sound called Date: Sun, 25 Apr 2010 16:31:24 -0700 On Sun, Apr 25, 2010 at 4:26 AM, Alexander Best <alexbestms@wwu.de> wrote: > 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). Hi Alexander, 1. How many cores and processors does your machine have? 2. Do you have SMP enabled? Thanks, -Garrett
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