Date: Wed, 9 Jun 1999 15:11:43 -0300 (ADT) From: The Hermit Hacker <scrappy@hub.org> To: "David E. Cross" <crossd@cs.rpi.edu> Cc: freebsd-current@FreeBSD.ORG, freebsd-stable@FreeBSD.ORG Subject: Re: MMAP() in STABLE/CURRENT ... Message-ID: <Pine.BSF.4.05.9906091509450.49155-100000@thelab.hub.org> In-Reply-To: <199906091754.NAA34746@cs.rpi.edu>
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On Wed, 9 Jun 1999, David E. Cross wrote:
> I believe I stumbled over this as well. (As a side note, you can run DDB
> over a serial console too, just compile with DDB, and DDB_UNATTENDED so your
> system will come back if it unexpectedly panics; on the serial console send
> a 'break').
And today's trick question...how do you send a break? :( I'm telnet'd
into a Livingston Portmaster, with 'telnet -E' to disable the telnet
break...I have DDB and DDB_UNATTENDED enabled and running right now, so if
I can get this break issue working, then I'm all set for the next time if
it happens :)
> Anyway, I have a simple program that mmap()s a 1Gig file into memory,
> madvise()s it that it will be doing random access. If I quit and restart
> this program a couple of times (yes, it close()s and munmap()s the segment),
> my system will hard lock. By dropping into DDB once I found that it was
> stuck in 'vm_somethingorother_choosepage'. Does this ring any bells? Should
> I try to stop my system again?
Just to prepare myself, if/when I get that break to work...you just did a
'trace', or is there something else I'll want to do in DDB?
Marc G. Fournier ICQ#7615664 IRC Nick: Scrappy
Systems Administrator @ hub.org
primary: scrappy@hub.org secondary: scrappy@{freebsd|postgresql}.org
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