[Lustre-discuss] 1.8.2 Patchless Client

[CHU, STEPHEN H (ATTSI)]

Hi Brian,

For RHEL 5.3, yes I was attempting to use the 1.8.2 lustre modules with kernel 2.6.18-128.el5. I have not thought of upgrading the -128 kernel to 2.6.18_164.11.1.el5 as you have suggested. I shall experiment on that and see how it works. Thanks for the reminder.

Steve

-----Original Message-----
From: Brian J. Murrell [mailto:Brian.Murrell at Sun.COM] 
Sent: Wednesday, February 17, 2010 10:55 AM
To: lustre-discuss at lists.lustre.org
Subject: Re: [Lustre-discuss] 1.8.2 Patchless Client

On Tue, 2010-02-16 at 14:18 -0500, CHU, STEPHEN H (ATTSI) wrote: 
> Hi Brian,

Hi,

> We are using RHEL 5.3 kernel-2.6.18-128.el5. Since we are not using the latest kernel, we have, in the past, used rsync to reconcile the differences and it worked fine.

So just to be clear, you are attempting to use the lustre modules built
for RedHat kernel 2.6.18_164.11.1.el5 with kernel 2.6.18-128.el5, right?

> This is how we can get the patchless clients to work between out of sync kernel and the patchless client modules.

Sometimes, perhaps.  I don't think there are any guarantees though, and
you appear to have run into a case where it just isn't going to work.

> We will have to go with the patched clients if this is not working out.

TBH, I'm not sure how patched clients are going to help here either
given that you seem to have a need to remain on kernel 2.6.18-128.el5
(or else you would have just upgrade it to match the 1.8.2 lustre
modules) and the kernel that was released with 1.8.2 is
2.6.18_164.11.1.el5 for both patched and patchless releases.

If you are willing to upgrade the kernel to our patched
2.6.18_164.11.1.el5 (which you MUST do to use the patched client) why
not just upgrade to the stock RH 2.6.18_164.11.1.el5 and use the 1.8.2.
patchless client modules with the kernel they were meant for?

b.