Date: Fri, 31 Aug 2018 13:46:08 -0600 From: Samuel Chow <cyschow@shaw.ca> To: Mark Johnston <markjdb@gmail.com>, Eugene Grosbein <eugen@grosbein.net> Cc: stable@freebsd.org Subject: Re: Cannot setup dumpdev on glabel disk Message-ID: <aa2610db-8cfa-697f-cd6e-0697e89fd245@shaw.ca> In-Reply-To: <20180831192103.GC54904@raichu> References: <19f80f48-5fea-e105-18b2-1a64e06acc79@shaw.ca> <6f6685d0-08c6-dbe2-62b5-3628f91917d9@grosbein.net> <20180831192103.GC54904@raichu>
next in thread | previous in thread | raw e-mail | index | archive | help
On 8/31/2018 1:21 PM, Mark Johnston wrote:
> On Sat, Sep 01, 2018 at 02:09:12AM +0700, Eugene Grosbein wrote:
>> 31.08.2018 23:08, Samuel Chow wrote:
>>
>>> I am running 11-STABLE, and I am experiencing kernel panics when I am destroying a VIMAGE-based jail. Naturally, I flipped to the chapter about 'Kernel Debugging' to learn about 'Obtaining a Kernel Crash Dump'.
>>>
>>> However, I am finding that my permanently glabel'ed disk partition cannot be used as dumpdev. Is that true, and why not? I mean, swap can use it just fine. I am unable to find this restriction in the documentation.
>>>
>>>
>>> # grep swap /etc/fstab
>>> /dev/label/boot01b none swap sw 0 0
>>> # swapinfo
>>> Device 1K-blocks Used Avail Capacity
>>> /dev/label/boot01b 41943040 0 41943040 0%
>>> # glabel status | grep boot
>>> label/boot01 N/A ada4s1
>>> label/boot02 N/A ada5s1
>>> # dumpon /dev/label/boot01b
>>> dumpon: ioctl(DIOCSKERNELDUMP): Operation not supported by device
>> That's not about label but underlying device that seems to be GEOM_PART_MBR
>> and it allows kernel dumps only if slice (MBR partition) type is 0xa5 for "freebsd"
>> or 0x82 ("linux swap"). Please show output of the command "gpart show ada4".
> Ah, right, please ignore my other reply. When I actually test it
> myself, dumpon /dev/label/foo seems to work; I assumed the lack of
> handling for GEOM::kerneldump in the glabel code was a problem. Sorry
> for the noise.
I wonder if you are testing the same thing as I am? It looks like you
are dumping to a glabel'ed device directly, whereas I am dumping to the
b partition of my glabel'ed disk.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?aa2610db-8cfa-697f-cd6e-0697e89fd245>