[dm-devel] how to load dm-multisnapshot [with LVM patch]

[Busby]

Hi,
     I have debug the lvm2.02.64 (with the shared-snapshot patches).
     In the last email I mentioned the 'Cannot update volume group vg00 with
unknown segments in it!'
     The debug mesg: " vg_has_unknown_segments  function: snapshot0 has
unknown seg."
      I don't know when the snapshot0 has been created?why its segtype
unkown?
     Hope for your help.
     Thank you.


Best regards,
Busby

在 2010年5月24日 下午5:04，Busby <chaimvy at gmail.com>写道：

> Hi All,
>
> I get the patches from:
> Linux kernel 2.6.34 patch:
> http://people.redhat.com/mpatocka/patches/kernel/new-snapshots/r19/
>
> LVM2-2.02.64 patch:
> http://people.redhat.com/msnitzer/patches/multisnap/lvm2/LVM2-2.02.64/
>
>
>
> but when I used it, the segment type can not find, can anyone help me?
>
>
>
> [root at new-host-34 ~]# pvcreate /dev/sd[bcdef]
>
> [root at new-host-34 ~]# vgcreate vg00 /dev/sd[bcdef]
>
> [root at new-host-34 ~]# lvcreate -L 100G -n lv_test /dev/vg00
>
> [root at new-host-34 ~]# lvcreate -L 200G -c 256 --sharedstore  mikulas -s
> /dev/vg00/lv_test
>
>   *WARNING: Unrecognised segment type multisnapshot*
>
> *  Cannot update volume group vg00 with unknown segments in it!*
>
> [root at new-host-34 ~]# lvscan
>
> ACTIVE         '/dev/vg00/lv_test' [100.00 GiB] inherit
>
>   inactive          '/dev/vg00/lv_test-shared' [200.00 GiB] inherit
>
> [root at new-host-34 ~]# lvcreate -s -n lv_test_ss1 /dev/vg00/lv_test
>
>   *Unable to create new logical volume with no extents*
>
>
>
>
>
> The dm modules in the system:
>
>
>
> [root at new-host-34 LVM2.2.02.64]# lsmod |grep dm
> dm_snapshot            25583  0
> dm_store_daniel        11304  0
> dm_store_mikulas       43265  0
> dm_multisnapshot       20276  2 dm_store_daniel,dm_store_mikulas
> dm_mirror              11564  0
> dm_multipath           14594  0
> scsi_dh                 5480  1 dm_multipath
> dm_region_hash          8233  1 dm_mirror
> dm_log                  8158  2 dm_mirror,dm_region_hash
> dm_mod                 58855  9 dm_snapshot,*
> dm_store_daniel,dm_store_mikulas,dm_multisnapshot*
> ,dm_mirror,dm_multipath,dm_log
>
>
>
>
>
>         I just want to use the multisnap by LVM2 command. But I don't know
> is there any document about HOW-TO?
>
>         Thank you very much.
>
>
>
>
>
>
>
> Best regards,
>
> Busby
>
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