[patch] allow crash dumps to Linux swap partitions

[Doug Barton]

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On 02/17/2012 02:46, Andrey V. Elsukov wrote:
> On 17.02.2012 14:16, Doug Barton wrote:
>> So I gave this a try, and I'm getting this:
>> 
>> 
>> GEOM_PART:dumpon:  ioctl(DIOCSKERNELDUMP)P: artition 'ad0s4' not 
>> suitable for kernel dumps (wrong type?) Operation not supported
>> by device /etc/rc: WARNING: unable to specify /dev/ad0s7 as a
>> dump device
>> 
>> I'm guessing that this is due to ad0s7 being in an extended
>> partition. So I take it we have no support for dumping to logical
>> partition?
> 
> EBR scheme serves logical partitions. Your extended partition is
> ad0s4, EBR's consumer is attached to MBR's ad0s4 provider. ad0s7 is
> EBR's provider.
> 
> When you are trying to configure ad0s7 as dump device, GEOM_PART
> asks EBR scheme: is kernel dump allowed or not? After r230064 it
> answers that dumping is allowed to partition with type
> DOSPTYP_386BSD and DOSPTYP_LINSWP. But, since ad0s7 has parent
> provider it forwards this request to MBR's ad0s4. MBR scheme also
> allows dumping only to the same partition types. But ad0s4
> partition has type DOSPTYP_EXT. And you got this error message.

Right, I assumed something like this from the mixture of ad0s4 and
ad0s7 in the error message, but thanks for the detailed explanation.

So that leads me to my next question ... can this be fixed?


Doug

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