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Date:      Wed, 13 Sep 2000 05:58:15 +1100 (EST)
From:      Bruce Evans <bde@zeta.org.au>
To:        Bruce Evans <bde@FreeBSD.org>
Cc:        cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject:   Re: cvs commit: src/sys/i386/i386 trap.c
Message-ID:  <Pine.BSF.4.21.0009130553450.252-100000@besplex.bde.org>
In-Reply-To: <200009121841.LAA30384@freefall.freebsd.org>

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On Tue, 12 Sep 2000, Bruce Evans wrote:

> bde         2000/09/12 11:41:56 PDT
> 
>   Modified files:
>     sys/i386/i386        trap.c 
>   Log:
>   Quick fix for hang on booting with -d.  mtx_enter() was called before
>   curproc was initialized.  curproc == NULL was interpreted as matching
>   the process holding Giant...  Just skip mtx_enter() and mtx_exit() in
>   trap() if (curproc == NULL && cold) (&& cold for safety).
>   
>   Revision  Changes    Path
>   1.154     +5 -3      src/sys/i386/i386/trap.c

Oops.  This was not quite the version that I tested, so it doesn't work.
It is a no-op.  init386() sets curproc early, and the hang is deeper in
mtx_enter().  Testing for (cold) works but is not obviously safe.  Fixes
tomorrow.

Bruce



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