`pvmove stuck" in RH bugzilla

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Hello,

I think we just trapped into the same trouble with pvmove as described in=
=20

https://bugzilla.redhat.com/show_bug.cgi?id=3D602516
https://bugzilla.redhat.com/show_bug.cgi?id=3D706036
etc.

Comment says, that
> I found a series of problems with pvmove which I have fixed in the upstre=
am
> repository. However, I would like to wait some time to see that no unint=
ended
> side-effects show up before seeing the change back-ported to RHEL. An au=
dit
> for similar bugs found a problem in lvremove, which I have also fixed.=20
> lvconvert still needs to be audited.


Alasdair, could you please point are those patches in vanilla kernel=20
(3.0-rc*) or linux-next, or some RH internal tree?=20
This is not critical, though I'd like to try out patches.


Thanks,
Sergey

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Re: `pvmove stuck" in RH bugzilla

On Wed, Jul 06, 2011 at 12:53:10PM +0300, Sergey Senozhatsky wrote:
> I think we just trapped into the same trouble with pvmove as described in
> https://bugzilla.redhat.com/show_bug.cgi?id=602516
> https://bugzilla.redhat.com/show_bug.cgi?id=706036
>
> Alasdair, could you please point are those patches in vanilla kernel
> (3.0-rc*) or linux-next, or some RH internal tree?
> This is not critical, though I'd like to try out patches.

This is a userspace bug not a kernel one.
There is a workaround, which is to perform the pvmove one LV at a time
using the --name option. (For each LV, run pvmove -n .)

The patched code is in the upstream lvm2 repository:
git://sources.redhat.com/git/lvm2
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/doc/?cvsroot=l vm2
http://sourceware.org/lvm2/

It was only last night that the code incorporating these changes passed
our public testsuite for the first time, so I think it is still
premature to be using this on production systems. But this means I hope
to be in a position to make the first development release containing a
fix for the problems quite soon. (I added assertions to catch other
instances of the related problems - it was more than just pvmove
affected.)

Alasdair

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Re: `pvmove stuck" in RH bugzilla

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On (07/06/11 12:23), Alasdair G Kergon wrote:
> On Wed, Jul 06, 2011 at 12:53:10PM +0300, Sergey Senozhatsky wrote:
> > I think we just trapped into the same trouble with pvmove as described =
in=20
> > https://bugzilla.redhat.com/show_bug.cgi?id=3D602516
> > https://bugzilla.redhat.com/show_bug.cgi?id=3D706036
> >=20
> > Alasdair, could you please point are those patches in vanilla kernel=20
> > (3.0-rc*) or linux-next, or some RH internal tree?=20
> > This is not critical, though I'd like to try out patches.
> =20
> This is a userspace bug not a kernel one.
> There is a workaround, which is to perform the pvmove one LV at a time
> using the --name option. (For each LV, run pvmove -n .)
>=20
> The patched code is in the upstream lvm2 repository:
> git://sources.redhat.com/git/lvm2
> http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/doc/?cvsroot=3 Dlvm2
> http://sourceware.org/lvm2/
>=20
> It was only last night that the code incorporating these changes passed
> our public testsuite for the first time, so I think it is still
> premature to be using this on production systems. But this means I hope
> to be in a position to make the first development release containing a
> fix for the problems quite soon. (I added assertions to catch other
> instances of the related problems - it was more than just pvmove
> affected.)
>=20

Thanks a lot for your reply.
We don't have a production machines here (just internal servers),
so I guess I could give it a try.


Best,
Sergey

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