Re: [PATCH]: Support dynamic resizing of vbds

["Pasi Kärkkäinen" <pasik@iki.fi>]

On Mon, Mar 22, 2010 at 10:42:48AM +0100, J. Roeleveld wrote:
> On Monday 22 March 2010 10:23:41 Jan Beulich wrote:
> > >>> "J. Roeleveld" <joost@antarean.org> 22.03.10 10:15 >>>
> > >
> > >On Monday 22 March 2010 09:47:40 Jan Beulich wrote:
> > >> Based on the location of the file patched, it this would seem to be
> > >> targeted at the 2.6.18 tree, but then 2.6.18 does not have a
> > >> revalidate_disk() function (introduced only in .28). What's the deal
> > >> here? Should this perhaps be carried out by open coding in blkfront
> > >> what .28 does?
> > >>
> > >> Thanks, Jan
> > >
> > >Hi Jan,
> > >
> > >These patches are based on the Suse Xen-kernel, which are based on the
> > > 2.6.30 kernel (or in that range)
> > >This patch applies cleanly to the xen-kernel for Gentoo which is based on
> > >2.6.29.
> > 
> > I understand that. But if the original patch has an issue, fixed by the
> > subsequently submitted one, then 2.6.18 (and other pre-.28 forward
> > ported kernels that would make use of the original patch) supposedly
> > also suffers from it, and hence also would need a respective fix.
> 
> True, as this patch uses a function that wasn't introduced before 2.6.28, then 
> the patch would need to be applied to 2.6.28+ or one that has that function 
> back-ported.
> 

RHEL5 2.6.18 kernels do have SCSI online resizing support. 
Redhat guys backported it for RHEL 5.3 (2.6.18-128).

Grabbing the patches from the latest el5 kernel might help.

-- Pasi