Re: URGENT: [diagnostic] cache_lock: blocked on 0xda5265a8 ""

["Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>]

Hello YONETANI-san,

nice to hear from you again!

YONETANI Tomokazu wrote:
> I wrote a patch some time ago to dump core without panicking
>   http://les.ath.cx/DragonFly/dumpnow.diff.gz
>
> It starts dumping if you set `sysctl debug.dumpnow=1'.  The network and
> other things become unresponsive during the dump(as they do during the
> panic) If dumping takes more than several minutes, you probably need to
> make another ssh connection to the server.

This sounds very nice!  Would you mind committing this?

I didn't look at the code, but you probably check for the dumpdev to be used?  Overwriting swap with memory contents would be disastrous.

cheers
 simon

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