Date: Tue, 6 Jan 2004 12:01:57 -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: <200401062002.i06K1v7E014699@gw.catspoiler.org> In-Reply-To: <1073418560.873.11.camel@shoeserv.freebsd>
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On 6 Jan, Stefan Ehmann wrote: > On Tue, 2004-01-06 at 20:05, Don Lewis wrote: >> On 6 Jan, Stefan Ehmann wrote: >> >> > I'm also still not sure why I got three "bad bufsize" panics in a row >> > all of the sudden instead of page faults. (Most of the previous kernels >> > were built without INVARIANTS - but at least some with). >> >> I forgot that historially the kernel options were not used when building >> modules. I think they are used right now, and were used for a while in >> the recent past. > > Finally found out in the handbook why debugging of the modules didn't > work and now got it right it seems. > > #0 doadump () at /usr/src/sys/kern/kern_shutdown.c:240 > #1 0xc04e5178 in boot (howto=256) at > /usr/src/sys/kern/kern_shutdown.c:372 > #2 0xc04e5507 in panic () at /usr/src/sys/kern/kern_shutdown.c:550 > #3 0xc07eb648 in feed_vchan_s16 (f=0xc3967c00, c=0x0, b=0xc37d0000 "", > count=2048, source=0xc3741500) at > /usr/src/sys/dev/sound/pcm/vchan.c:80 It is somewhat worrysome that c is 0x0 here, since it should be the same as channel in frame #4. Maybe a gdb oops? Print *src in this frame, the KASSERT is apparently failing because the bufsize member of this structure is not the same as the count parameter. > #4 0xc07e1c6d in sndbuf_feed (from=0xc3741500, to=0xc3741600, > channel=0xc37a8880, feeder=0xc3967c00, count=3279164672) at > feeder_if.h:60 Also, print *channel in this frame. I'd like to see what flags are set.
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