Re: dk for z/lvm volumes?

[Chavdar Ivanov <ci4ic4%gmail.com@localhost>]

On Sat, 29 Feb 2020 at 12:02, Michael van Elst <mlelstv%serpens.de@localhost> wrote:
>
> ci4ic4%gmail.com@localhost (Chavdar Ivanov) writes:
>
> >> gdb points to spec_read:
> >>
> >> (gdb) target kvm netbsd.12.core
> >> 0xffffffff80224225 in cpu_reboot ()
> >> (gdb) bt
> >> #0  0xffffffff80224225 in cpu_reboot ()
> >> #1  0xffffffff809fde2f in kern_reboot ()
> >> #2  0xffffffff80a40299 in vpanic ()
> >> #3  0xffffffff80a4035d in panic ()
> >> #4  0xffffffff8022669d in trap ()
> >> #5  0xffffffff8021ed43 in alltraps ()
> >> #6  0xffffffff80abd3bf in spec_read ()
>
> Got it. specfs relies on a sanitized pi_bsize value.
>
> I've updated the patch. Please try again.

It works fine, now I can both
...
[    87.984501] ccd0: Concatenating 1 components
[    87.984501] ccd0: /dev/zvol/dsk/tank/testu (4194304 blocks)
[    87.984501] ccd0: total 4194304 blocks
/home/xci [ disklabel ccd0

                 ] 1:59 pm
# /dev/rccd0:
type: ccd
disk: ccd
label: fictitious
flags:
bytes/sector: 512
sectors/track: 2048
tracks/cylinder: 1
sectors/cylinder: 2048
cylinders: 2048
total sectors: 4194304
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0

4 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 a:   4194304         0     4.2BSD      0     0     0  # (Cyl.      0 -   2047)
 d:   4194304         0     unused      0     0        # (Cyl.      0 -   2047)
disklabel: boot block size 0
disklabel: super block size 0
....

and  working net/istgt on a zvol.

It is interesting it it will work as a swap device; while since
yesterday it was possible to add a zvol as a swap device, it didn't
actually work - it just resets or hangs the system; here I am able to
change the ccd0a type to swap and add it:

# swapctl -l

       ] 2:06 pm
Device      512-blocks     Used    Avail Capacity  Priority
/dev/dk2       7221248        0  7221248     0%    0
/dev/ccd0a     4194304        0  4194304     0%    0
Total         11415552        0 11415552     0%
...
I'll see if it will work or hang when I put some load on the system.
presumably getting it to use it.


Thanks,


>
> --
> --
>                                 Michael van Elst
> Internet: mlelstv%serpens.de@localhost
>                                 "A potential Snark may lurk in every tree."



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