[Lustre-devel] oldest lustre supported SUSE kernel

[tao....@emc.com]

Hi,

As I know, the oldest lustre supported RHEL kernel is 2.6.18-latest. What is the oldest SUSE kernel? 2.6.32-latest?

Best Regards,
Tao

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[Andreas Dilger]

On 2012-02-06, at 2:53, <tao....@emc.com> wrote:
>
> As I know, the oldest lustre supported RHEL kernel is 2.6.18-latest. What is the oldest SUSE kernel? 2.6.32-latest?

That depends on which version of Lustre you are asking about, and whether you are asking about the client or server.

For Lustre 2.2+ servers it will be SLES11 SP1 (2.6.32), since it matches RHEL6 (2.6.32).

For clients it is RHEL5 (2.6.18) and SLES11 SP0 (2.6.27).

Cheers, Andreas

[Peng Tao]

On Feb 7, 2012 12:36 AM, "Andreas Dilger" <adi...@whamcloud.com> wrote:
>
> On 2012-02-06, at 2:53, <tao....@emc.com> wrote:
> >
> > As I know, the oldest lustre supported RHEL kernel is 2.6.18-latest. What is the oldest SUSE kernel? 2.6.32-latest?
>
> That depends on which version of Lustre you are asking about, and whether you are asking about the client or server.
>
> For Lustre 2.2+ servers it will be SLES11 SP1 (2.6.32), since it matches RHEL6 (2.6.32).
>
> For clients it is RHEL5 (2.6.18) and SLES11 SP0 (2.6.27).
>

I see. Thank you!

Best,
Tao

[tao....@emc.com]

Hi Andreas,

> -----Original Message-----
> From: Andreas Dilger [mailto:adi...@whamcloud.com]
> Sent: Tuesday, February 07, 2012 12:36 AM
> To: Peng, Tao
> Cc: <lustre...@lists.lustre.org>
> Subject: Re: [Lustre-devel] oldest lustre supported SUSE kernel
>
> On 2012-02-06, at 2:53, <tao....@emc.com> wrote:
> >
> > As I know, the oldest lustre supported RHEL kernel is 2.6.18-latest. What is the oldest SUSE kernel?
> 2.6.32-latest?
>
> That depends on which version of Lustre you are asking about, and whether you are asking about the
> client or server.
>
> For Lustre 2.2+ servers it will be SLES11 SP1 (2.6.32), since it matches RHEL6 (2.6.32).
>
> For clients it is RHEL5 (2.6.18) and SLES11 SP0 (2.6.27).
>

We found that latest master branch doesn't build client for SLES11 SP0 (2.6.27). Does it mean master has moved on dropping SLES11 SP0 or it should be fixed?

Thanks,
Tao

From: Zhang, Kelly
Sent: Thursday, March 08, 2012 6:44 PM
To: Peng, Tao
Cc: China COE FastData
Subject: RE: Conversation with Zhang, Kelly

The latest Lustre code also fails on suse11SP0(kernel version linux-2.6.27.19-5.1), when building Lustre:
cc1: warnings being treated as errors
/home/master/kernel/rpmbuild/BUILD/lustre-2.2.50/lustre/llite/llite_mmap.c:585: error: initialization from incompatible pointer type
make[8]: *** [/home/master/kernel/rpmbuild/BUILD/lustre-2.2.50/lustre/llite/llite_mmap.o] Error 1
make[7]: *** [/home/master/kernel/rpmbuild/BUILD/lustre-2.2.50/lustre/llite] Error 2
make[6]: *** [/home/master/kernel/rpmbuild/BUILD/lustre-2.2.50/lustre] Error 2
make[5]: *** [_module_/home/master/kernel/rpmbuild/BUILD/lustre-2.2.50] Error 2
make[5]: Leaving directory `/var/tmp/kernel-source-2.6.27.19-build/usr/src/linux-2.6.27.19-5.1'
make[4]: *** [modules] Error 2
make[4]: Leaving directory `/home/master/kernel/rpmbuild/BUILD/lustre-2.2.50'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/home/master/kernel/rpmbuild/BUILD/lustre-2.2.50'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/master/kernel/rpmbuild/BUILD/lustre-2.2.50'
error: Bad exit status from /var/tmp/rpm-tmp.76807 (%build)

[James Simmons]

> > On 2012-02-06, at 2:53, <tao....@emc.com> wrote:
> > >
> > > As I know, the oldest lustre supported RHEL kernel is 2.6.18-latest. What is the oldest SUSE kernel?
> > 2.6.32-latest?
> >
> > That depends on which version of Lustre you are asking about, and whether you are asking about the
> > client or server.
> >
> > For Lustre 2.2+ servers it will be SLES11 SP1 (2.6.32), since it matches RHEL6 (2.6.32).
> >
> > For clients it is RHEL5 (2.6.18) and SLES11 SP0 (2.6.27).
> >
> We found that latest master branch doesn't build client for SLES11 SP0 (2.6.27). Does it mean master has moved on dropping SLES11 SP0 or it should be fixed?

I build and use lustre on SLES11 SP1 clients and routers (using server
version). It works fine. Is there a reason you use SP0?

[tao....@emc.com]

> -----Original Message-----
> From: James Simmons [mailto:jsim...@infradead.org]
> Sent: Friday, March 09, 2012 12:49 AM
> To: Peng, Tao
> Cc: adi...@whamcloud.com; wc-di...@whamcloud.com; lustre...@lists.lustre.org
> Subject: Re: [Lustre-devel] oldest lustre supported SUSE kernel
>
>

> > > On 2012-02-06, at 2:53, <tao....@emc.com> wrote:
> > > >
> > > > As I know, the oldest lustre supported RHEL kernel is 2.6.18-latest. What is the oldest SUSE
> kernel?
> > > 2.6.32-latest?
> > >
> > > That depends on which version of Lustre you are asking about, and whether you are asking about the
> > > client or server.
> > >
> > > For Lustre 2.2+ servers it will be SLES11 SP1 (2.6.32), since it matches RHEL6 (2.6.32).
> > >
> > > For clients it is RHEL5 (2.6.18) and SLES11 SP0 (2.6.27).
> > >
> > We found that latest master branch doesn't build client for SLES11 SP0 (2.6.27). Does it mean master
> has moved on dropping SLES11 SP0 or it should be fixed?
>
> I build and use lustre on SLES11 SP1 clients and routers (using server
> version). It works fine. Is there a reason you use SP0?

We are not using SP0. Just that we are working on cleaning up some old code and would like to make sure Lustre works as it says in the lustre/kernel_patches/which_patch
2.6.27.19-5 (SLES11)

Thanks,
Tao

[Andreas Dilger]

On 2012-03-08, at 10:55 PM, <tao....@emc.com> <tao....@emc.com> wrote:

>> Andreas Dilger <adi...@whamcloud.com> wrote:
>> On 2012-02-06, at 2:53, <tao....@emc.com> wrote:
>>> As I know, the oldest lustre supported RHEL kernel is 2.6.18-latest. What is the oldest SUSE kernel?
>>
>> 2.6.32-latest?
>>
>> That depends on which version of Lustre you are asking about, and whether you are asking about the client or server.
>>
>> For Lustre 2.2+ servers it will be SLES11 SP1 (2.6.32), since it matches RHEL6 (2.6.32).
>>
>> For clients it is RHEL5 (2.6.18) and SLES11 SP0 (2.6.27).
>
> We found that latest master branch doesn't build client for SLES11 SP0 (2.6.27). Does it mean master has moved on dropping SLES11 SP0 or it should be fixed?

This looks like the page_mkwrite() prototype changing from "struct page *" (which is in kernels before 2.6.29) to "struct vm_fault *" (which is used in later kernels). I don't have a SLES11 SP0 kernel available to check which one it is using, but it should be the "struct page *" based on the kernel version. This should already be handled by the check for HAVE_VM_OP_FAULT, but possibly this is broken in newer versions of the SP0 kernel?

It often happens that vendor kernels backport code/APIs from newer kernels in order to make porting other drivers/filesystem code easier.

As you can tell, we do not build the SLES11 SP0 client ourselves automatically, only the SP1 client, but if the effort is not huge it would be preferable to keep this client working. We typically try to keep the range of working clients as large as possible, since administrators may not have as much control over the running clients as they do over the servers.

I would guess (without having looked at the SP0 kernel) that it may just be possible to change lustre/autoconf/lustre-core.m4 to check this prototype, and move the two ll_page_mkwrite() helpers into their own "#ifdef HAVE_PAGE_MKWRITE_VM_FAULT" section separate from HAVE_VM_OP_FAULT.

If this analysis is incorrect, I apologize, but I'm travelling and unable to download the whole kernel at this time.

Cheers, Andreas

> From: Zhang, Kelly
> Sent: Thursday, March 08, 2012 6:44 PM
> To: Peng, Tao
> Cc: China COE FastData
> Subject: RE: Conversation with Zhang, Kelly
>
> The latest Lustre code also fails on suse11SP0(kernel version linux-2.6.27.19-5.1), when building Lustre:
> cc1: warnings being treated as errors
> /home/master/kernel/rpmbuild/BUILD/lustre-2.2.50/lustre/llite/llite_mmap.c:585: error: initialization from incompatible pointer type
> make[8]: *** [/home/master/kernel/rpmbuild/BUILD/lustre-2.2.50/lustre/llite/llite_mmap.o] Error 1
> make[7]: *** [/home/master/kernel/rpmbuild/BUILD/lustre-2.2.50/lustre/llite] Error 2
> make[6]: *** [/home/master/kernel/rpmbuild/BUILD/lustre-2.2.50/lustre] Error 2
> make[5]: *** [_module_/home/master/kernel/rpmbuild/BUILD/lustre-2.2.50] Error 2
> make[5]: Leaving directory `/var/tmp/kernel-source-2.6.27.19-build/usr/src/linux-2.6.27.19-5.1'
> make[4]: *** [modules] Error 2
> make[4]: Leaving directory `/home/master/kernel/rpmbuild/BUILD/lustre-2.2.50'
> make[3]: *** [all-recursive] Error 1
> make[3]: Leaving directory `/home/master/kernel/rpmbuild/BUILD/lustre-2.2.50'
> make[2]: *** [all] Error 2
> make[2]: Leaving directory `/home/master/kernel/rpmbuild/BUILD/lustre-2.2.50'
> error: Bad exit status from /var/tmp/rpm-tmp.76807 (%build)
>

Cheers, Andreas
--
Andreas Dilger Whamcloud, Inc.
Principal Lustre Engineer http://www.whamcloud.com/

[tao....@emc.com]

> -----Original Message-----
> From: Andreas Dilger [mailto:adi...@whamcloud.com]

> Sent: Friday, March 09, 2012 3:37 PM
> To: Peng, Tao

> Cc: lustre...@lists.lustre.org; wc-di...@whamcloud.com
> Subject: Re: [Lustre-devel] oldest lustre supported SUSE kernel
>

Thanks for confirming that it is still supported. And I verified it can be fixed as you described. I created LU-1200 and attached the fix there.

Cheers,
Tao

[James Simmons]

> > As you can tell, we do not build the SLES11 SP0 client ourselves automatically, only the SP1 client,
> > but if the effort is not huge it would be preferable to keep this client working. We typically try to
> > keep the range of working clients as large as possible, since administrators may not have as much
> > control over the running clients as they do over the servers.
> >
> > I would guess (without having looked at the SP0 kernel) that it may just be possible to change
> > lustre/autoconf/lustre-core.m4 to check this prototype, and move the two ll_page_mkwrite() helpers
> > into their own "#ifdef HAVE_PAGE_MKWRITE_VM_FAULT" section separate from HAVE_VM_OP_FAULT.
> Thanks for confirming that it is still supported. And I verified it can be fixed as you described. I created LU-1200 and attached the fix there.

Sorry to nit pick but can you push your patch with gerrit instead of just
posting it to the Jira ticket.

[tao....@emc.com]

________________________________________
From: James Simmons [jsim...@infradead.org]
Sent: Friday, March 09, 2012 8:56 PM
To: Peng, Tao
Cc: adi...@whamcloud.com; wc-di...@whamcloud.com; lustre...@lists.lustre.org
Subject: [wc-discuss] Re: [Lustre-devel] oldest lustre supported SUSE kernel

> > As you can tell, we do not build the SLES11 SP0 client ourselves automatically, only the SP1 client,
> > but if the effort is not huge it would be preferable to keep this client working. We typically try to
> > keep the range of working clients as large as possible, since administrators may not have as much
> > control over the running clients as they do over the servers.
> >
> > I would guess (without having looked at the SP0 kernel) that it may just be possible to change
> > lustre/autoconf/lustre-core.m4 to check this prototype, and move the two ll_page_mkwrite() helpers
> > into their own "#ifdef HAVE_PAGE_MKWRITE_VM_FAULT" section separate from HAVE_VM_OP_FAULT.
> Thanks for confirming that it is still supported. And I verified it can be fixed as you described. I created LU-1200 and attached the fix there.

Sorry to nit pick but can you push your patch with gerrit instead of just
posting it to the Jira ticket.

[PT] Here it is:
http://review.whamcloud.com/#change,2277