vm_map.c lock up (Was: Re: NFS Locking Issue)

[Anish Mistry]

On Saturday 15 July 2006 00:08, User Freebsd wrote:
> On Sat, 15 Jul 2006, Kostik Belousov wrote:
> > On Sat, Jul 15, 2006 at 12:10:29AM -0300, User Freebsd wrote:
> >> On Wed, 5 Jul 2006, Robert Watson wrote:
> >>> If you can get into DDB when the hang has occurred, output via
> >>> serial console for the following commands would be very
> >>> helpful:
> >>>
> >>> show pcpu
> >>> show allpcpu
> >>> ps
> >>> trace
> >>> traceall
> >>> show locks
> >>> show alllocks
> >>> show uma
> >>> show malloc
> >>> show lockedvnods
> >>
> >> 'k, after 16 days uptime, the server that I got all the
> >> debugging turned on for finally hung up solid ... I was able to
> >> break into DDB over the serial link, and have run all of the
> >> above on it ... and the output is attached ...
> >>
> >> One thing to note is that the ps listing is not complete ...
> >> there are >6k processes running at the time, and I don't know
> >> how to get rid of the '--more--' prompt :(  After 1k processes,
> >> I just hit 'q' and went onto the other commands ...
> >
> > set lines=0
> >
> >> Also, traceall gave me a 'No such command' error ... now that I
> >> think about it, my luck, it was supposed to be 'trace all'?
> >
> > It is alltrace.
> >
> >> If this doesn't provide enough information, please let me know
> >> what else I should do the next time through, besides the above
> >> commands ...
> >
> > Missing alltrace output seems to be critical. If this is not
> > feasible, please, provide at least the output of the bt <pid> for
> > each pid shown in the "show lockedvnods" and "show alllocks". In
> > you case, bt 64880 was the most interesting. It is pity that you
> > had reset the machine.
>
> Was down for too long as it was ... it, of course, happened while I
> was out with the family :(
>
> Will keep all of this in mind next time I get a chance to run
> through things ...
>
> Any idea why 'panic' doesn't produce core like it used to?
call doadump
Should force a core dump.

-- 
Anish Mistry
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 187 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20060715/f8e60949/attachment.pgp