Date: Sat, 06 May 2000 00:13:34 -0600 From: Wes Peters <wes@softweyr.com> To: Warner Losh <imp@village.org> Cc: hackers@FreeBSD.ORG Subject: Re: Can NMI drop a hanging FreeBSD kernel into DDB? Message-ID: <3913B80E.F899DCE9@softweyr.com> References: <200005060453.WAA59241@harmony.village.org> <20000505122029.C29830@fw.wintelcom.net> <200005051831.LAA25307@george.lbl.gov> <200005060456.WAA59299@harmony.village.org>
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Warner Losh wrote:
>
> In message <200005060453.WAA59241@harmony.village.org> Warner Losh writes:
> : However, it won't work if you are hacking pci hardware and manage to
> : hang the PCI bus.
>
> Unless, of course, the trap handler is in cache as well as the
> debugger routines you need. On rare occasions this is true, but
> almsot all the time it isn't. There's not a good way to force it
> either since if you knew you were about to hang the pci bus, you'd not
> do the action that would hang it :-).
No cache-line-locking on x86? Sigh.
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
wes@softweyr.com http://softweyr.com/
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