Lustre discuss - May 2009 - "Building Lustre, Protocol Basics, and Debugging" presentation

Hello All,

I was intrigued by this slide show
http://wiki.lustre.org/images/1/1f/Lug_johann.pdf


I have a question on slide 5

Kernel patches needed
> Re-add journal callback support in jbd
> Jbd fixes & statistics
> scsi disk statistics
    ? could be removed if blktrace enabled
> Export some symbols used by lustre
> API for setting block device read-only
> ...

What is the purpose of these extra kernel patches? I was under the
impression on Lustre patch for the kernel is needed for the MDS/OSS.
Where can I find a full list the patches I need to "enchance" our
OSS/MDS?

TIA

On May 7, 2009, at 1:07 PM, Mag Gam wrote:
> What is the purpose of these extra kernel patches?
Add things (ability to register journal callbacks, export some symbols  
which are not available to
modules by default, ...) which are needed by Lustre.
> I was under the impression on Lustre patch for the kernel is needed  
> for the MDS/OSS.
Yes, those patches are needed on the server side (OSS/MDS) only.
> Where can I find a full list the patches I need to "enchance" our
> OSS/MDS?
hm, not sure to understand what you mean by "enchance", but those  
patches are listed
in the series files, under lustre/kernel_patches/series.

Johann

Thanks for the response John.



On Thu, May 7, 2009 at 8:54 AM, Johann Lombardi <johann at sun.com>
wrote:
> On May 7, 2009, at 1:07 PM, Mag Gam wrote:
>>
>> What is the purpose of these extra kernel patches?
>
> Add things (ability to register journal callbacks, export some symbols
which
> are not available to
> modules by default, ...) which are needed by Lustre.
>
>> I was under the impression on Lustre patch for the kernel is needed for
>> the MDS/OSS.
>
> Yes, those patches are needed on the server side (OSS/MDS) only.
>
>> Where can I find a full list the patches I need to "enchance"
our OSS/MDS?
>
> hm, not sure to understand what you mean by "enchance", but those
patches
> are listed
> in the series files, under lustre/kernel_patches/series.
>
> Johann
>