[7.0-R] Possible ufs livelock during coredump path?

[Peter Holm]

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> Hi,
>
> It seems that we have a potential livelock during coredump on 7.0-R, the
> case was that two processes trying to coredump in the same time (e.g. if
> I configure kern.corefile=/var/tmp/%N.core and a lot of instances
> coredump in the same time), perhaps when paging involved with it.  Upon
> reboot, it would not recover but wait infinitely.  The box is running
> 7.0-R/i386, UP (Origin = "GenuineIntel"  Id = 0xf34  Stepping = 4).
>
> Is this an known issue?  This is my own server but I do not have my
> hands on it because it is in China, however I can provide some help if
> the experiment can be recovered with a power-cycle :)
>

AFAIK it is an old problem. I have some test where I had to disable core
dumps for the same reason. I seem to remember that the problem is related
to running out of VM?

- Peter



> Cheers,
> - --
> Xin LI <delphij at delphij.net>	http://www.delphij.net/
> FreeBSD - The Power to Serve!
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