[linux-lvm] Linux 2.4.16+SMP+Ext3+LVM snapshots

[linux-lvm] Linux 2.4.16+SMP+Ext3+LVM snapshots

[Brian]

So I'm building a file server with a 3ware raid card (6800, maybe replaced 
with a 7800).

This is a dual-1.2 Athlon running 2.4.16 with LVM sitting below our ~700GB 
ext3 data partition.  At first, we used the lvm support included in the 
kernel.

After some copying, I tested
	lvcreate -s -l 200 -n test1 /dev/vol0/cobra
The snapshot was corrupt.  Known problem.  Fair enough.

So I grabbed lvm 1.0.1 (released a couple days ago).  I patched the kernel 
with the new lvm and the VFS-lock patch for 2.4.11.  There were quite a 
few offsets, but it otherwise applied cleanly.

I started a big cp off an NFS mount and ran
	lvcreate -s -l 200 -n test1 /dev/vol0/cobra
The cp and lvcreate deadlocked.  Both are frozen in D state and they're 
not coming out.

Snapshots were the big reason for us to use LVM, so this is not good.

Help!
	-- Brian

RE: [linux-lvm] Linux 2.4.16+SMP+Ext3+LVM snapshots

[Jean-Eric Cuendet]

> So I grabbed lvm 1.0.1 (released a couple days ago).  I 
> patched the kernel 
> with the new lvm and the VFS-lock patch for 2.4.11.  There 

Is VFS-lock patch necessary to run LVM? 
I have LVM 1.0.1 on some of our servers without any problem, but what is
the goal of this patch?

Thanks
-jec

Re: [linux-lvm] Linux 2.4.16+SMP+Ext3+LVM snapshots

[Andreas Dilger]

On Nov 30, 2001  08:24 +0100, Jean-Eric Cuendet wrote:
> > So I grabbed lvm 1.0.1 (released a couple days ago).  I 
> > patched the kernel 
> > with the new lvm and the VFS-lock patch for 2.4.11.  There 
> 
> Is VFS-lock patch necessary to run LVM? 
> I have LVM 1.0.1 on some of our servers without any problem, but what is
> the goal of this patch?

You only need it if you are making snapshots of journaled filesystems
(e.g. ext3, reiserfs, XFS).

Cheers, Andreas
--
Andreas Dilger
http://sourceforge.net/projects/ext2resize/
http://www-mddsp.enel.ucalgary.ca/People/adilger/