Red Hat Bugzilla – Bug 1286283
dmstats: support non-dm devices for stats create
Last modified: 2016-12-21 15:55:16 EST
Description of problem:
Device-mapper IO statistics can be used with any block device providing a dm-linear layer is mapped over the underlying device, e.g.:
# dmsetup create sda --table="0 2048 linear 8:0"
# dmstats create sda
# < ... do stuff ... >
# dmstats delete sda
# dmsetup remove sda
Doing so is tedious and requires the user to have knowledge of device-mapper targets and table syntax.
By providing the ability to automatically create the linear map when required (and when the requested device is idle) the use of device-mapper statistics with non device-mapper devices is considerably simplified.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. dmstats create /dev/sda
# dmstats create /dev/sda
Device sda not found
* creates dm device "sda"
* registers requested stats regions on dm device "sda"
*** This bug has been marked as a duplicate of bug 1286282 ***