[CentOS] LVM: Shrinking a physical partition

[Johnny Hughes]

On Wed, 2006-01-18 at 00:20 -0600, Les Mikesell wrote:
> On Tue, 2006-01-17 at 20:28, Collins Richey wrote:
> 
> > Just for the record, are you up to 4.2 level? AFAIK, lvm(2) support
> > was quite broken prior to that. Waiting for others to comment.
> 
> Does that mean it is no longer broken, or just not quite as
> broken as it used to be?  Are snapshots reliable now?
> 
Snapshots are not reliable yet, in my experience. (In the currently
released code from EL4u2).

There are more improvements in the u3 kernel: 

------
-set of device mapper changes: (Alasdair G Kergon)
 -fix dm_swap_table error cases
 -device-mapper multipath: Use private workqueue [154432]
 -device-mapper dm-emc: Fix a memset [154435]
 -device-mapper multipath: Flush workqueue when destroying [156412]
 -dm-raid1: Limit bios to size of mirror region
 -device-mapper snapshots: Handle origin extension
 -device-mapper dm.c - set of locking fixes [156569]
 -device-mapper multipath: Clean up presuspend hook
 -device-mapper multipath: Not every error is EIO [155427 151324]
 -device-mapper multipath: Fix pg initialisation races [154442]
 -device-mapper multipath: Default to SCSI error handler
------

and in the u3 LVM2

------
* Fri Dec 02 2005 Alasdair Kergon <agk at redhat.com> - 2.02.01-1.1

- Build against latest device-mapper package.

* Wed Nov 23 2005 Alasdair Kergon <agk at redhat.com> - 2.02.01-1.0

- Fix lvdisplay command line for snapshots; fix open file promotion
  to read/write; fix an lvcreate error path.
- Update package dependencies.

* Thu Nov 10 2005 Alasdair Kergon <agk at redhat.com> - 2.02.00-1.0

- Lots of fixes and new activation code.
------

We shall see if this is any better, so far it seems to be ... but I am
not running this in production yet.
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