From owner-freebsd-current  Thu Aug 16  3:39:53 2001
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Date: Thu, 16 Aug 2001 20:39:47 +1000 (EST)
From: Bruce Evans <bde@zeta.org.au>
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To: "David O'Brien" <obrien@FreeBSD.ORG>
Cc: <current@FreeBSD.ORG>
Subject: Re: mutex Giant not owned
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On Wed, 15 Aug 2001, David O'Brien wrote:

> panic: mutex Giant not owned at ../../../kern/vfs_subr.c:2363
> ...
> #7  0xfffffc00003d6090 in panic (
>     fmt=0xfffffc00005a9096 "mutex %s not owned at %s:%d")
>     at ../../../kern/kern_shutdown.c:600
> #8  0xfffffc00003ca404 in _mtx_assert (m=0x0, what=0, file=0x0, line=0)
>     at ../../../kern/kern_mutex.c:570
> #9  0xfffffc00005303c8 in vm_map_growstack (p=0xfffffe001fb7ad00,
>     addr=301969984) at ../../../vm/vm_map.c:2473
> #10 0xfffffc00005612d8 in grow_stack (p=0x0, sp=0)
>     at ../../../alpha/alpha/vm_machdep.c:412
> #11 0xfffffc0000553bb0 in sendsig (catcher=0, sig=11, mask=0xfffffe001fb7aec8,
>     code=5905801216) at ../../../alpha/alpha/machdep.c:1388
> #12 0xfffffc00003da534 in trapsignal (p=0xfffffe001fb7ad00, sig=11,
>     code=5905801216) at ../../../kern/kern_sig.c:1060
> #13 0xfffffc000055eecc in trap (a0=5905801216, a1=1, a2=1, entry=2,
>     framep=0xfffffe0023819ed8) at ../../../alpha/alpha/trap.c:617
> #14 0xfffffc000054ccdc in XentMM ()

alpha/trap.c seems to be missing the necessary aquiral of Giant before
calling trapsignal().

Bruce


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