Re: Can NMI drop a hanging FreeBSD kernel into DDB?

[Wes Peters]

Warner Losh wrote:
> 
> In message <[EMAIL PROTECTED]> 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
[EMAIL PROTECTED]                                           http://softweyr.com/


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