Date: Sun, 4 Jan 2004 14:24:25 -0800 (PST) From: Don Lewis <truckman@FreeBSD.org> To: shoesoft@gmx.net Cc: current@FreeBSD.org Subject: Re: page fault panic tracked down (selwakeuppri()) Message-ID: <200401042224.i04MOP7E009799@gw.catspoiler.org> In-Reply-To: <1073227819.1764.13.camel@shoeserv.freebsd>
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On 4 Jan, Stefan Ehmann wrote: > On Sat, 2004-01-03 at 05:01, Don Lewis wrote: >> I wouldn't rule out the dsp, since you audio player software may be >> calling select() on the fd for the audio device. You might want to back >> out Bruce's quick hack and change the second argument to selwakeuppri() >> to -1 in chn_wakeup() in dev/sound/pcm/channel.c. >> >> Is your kernel compiled with the INVARIANTS and INVARIANTS_SUPPORT >> options? >> >> Something else that I noticed is that the CHN_LOCKASSERT macro has an >> empty definition in dev/sound/pcm/channel.h. You might want to try >> defining it as >> mtx_assert((struct mtx *)((c)->lock), MA_OWNED) >> >> I still don't see any obvious cause for this problem. > > I took out the debug options because it was just too slow. Put back > INVARIANTS (but no WITNESS) now and speed is nice again. This problem is more likely to be caught by INVARIANTS than WITNESS. > Applied your suggested changes which resulted in a panic. No > assertations were triggered though. Bummer!
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