Bug 206005 - KDB should give a more helpful error message for encrypted swap
Summary: KDB should give a more helpful error message for encrypted swap
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: bin (show other bugs)
Version: CURRENT
Hardware: Any Any
: --- Affects Only Me
Assignee: freebsd-bugs (Nobody)
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-01-07 16:04 UTC by Tony Narlock
Modified: 2016-01-09 00:38 UTC (History)
0 users

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Description Tony Narlock 2016-01-07 16:04:09 UTC 
On two systems running 11-CURRENT, I configured encrypted swap (both manually through shell and through the installer front end).  Both dumps I switched on the setting for dumping to dev, which added:

dumpdev="AUTO"

to /etc/rc.conf as expected.

However, when panics occur and dropped into KDB, 'dump' would not work:

   Cannot dump: no dump device specified

I ended up going around in circles for a while, until eventually I was explained it worked by dumping to swap, and I volunteered that my swap was an eli drive.

So since then, I reconfigured my system to use a swap drive without eli and now dump works.

I think KDB should give a more helpful message for encrypted swaps. KDB doesn't support dumping to encrypted swap. This confused me for quite a while, since there isn't much in handbooks / forums / lists about this shortcoming.