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Re: [PATCH] staging: lustre: Handle nodemask on UMP machines

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  Re: [PATCH] staging: lustre: Handle nodemask on UMP machines Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-12-21 23:10 +0100
    Re: [lustre-devel] [PATCH] staging: lustre: Handle nodemask on UMP  machines "Dilger, Andreas" <andreas.dilger@intel.com> - 2015-12-22 01:40 +0100

#1296245 — Re: [PATCH] staging: lustre: Handle nodemask on UMP machines

On Sun, Nov 08, 2015 at 11:34:55AM -0500, James Simmons wrote:
> For UMP and SMP machines the struct cfs_cpt_table are
> defined differently. In the case handled by this patch
> nodemask is defined as a integer for the UMP case and
> as a pointer for the SMP case. This will cause a problem
> for ost_setup which reads the nodemask directly. Instead
> we create a UMP version of cfs_cpt_nodemask and use that
> in ost_setup.
> 
> Signed-off-by: James Simmons <uja.ornl@gmail.com>
> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4199
> Reviewed-on: http://review.whamcloud.com/9219
> Reviewed-by: Liang Zhen <liang.zhen@intel.com>
> Reviewed-by: Li Xi <pkuelelixi@gmail.com>
> Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
> 
> Starting in 3.14 kernels nodemask_t was changed from a
> a unsigned long to a linux bitmap so more than 32 cores
> could be supported. Using set_bit in cfs_cpt_table_alloc
> no longer compiles so this patch backports bits of the
> node management function that use a linux bitmap back
> end. Cleaned up libcfs bitmap.h to use the libcfs layers
> memory allocation function. This was pulling in lustre
> related code that was not defined.
> 
> Signed-off-by: James Simmons <uja.ornl@gmail.com>
> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4993
> Reviewed-on: http://review.whamcloud.com/10332
> Reviewed-by: Liang Zhen <liang.zhen@intel.com>
> Reviewed-by: Bob Glossman <bob.glossman@intel.com>
> Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>

What is with this crazy two sections of signed-off-by?  If this was 2
patches, make it two patches.

If not, then don't do this.

Also, this whole series had no numbering, so I don't know how to apply
them, please fix and resend it.

thanks,

greg k-h
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#1296400 — Re: [lustre-devel] [PATCH] staging: lustre: Handle nodemask on UMP machines

On 2015/12/21, 15:08, "lustre-devel on behalf of Greg Kroah-Hartman"
<lustre-devel-bounces@lists.lustre.org on behalf of
gregkh@linuxfoundation.org> wrote:

>On Sun, Nov 08, 2015 at 11:34:55AM -0500, James Simmons wrote:
>> For UMP and SMP machines the struct cfs_cpt_table are
>> defined differently. In the case handled by this patch
>> nodemask is defined as a integer for the UMP case and
>> as a pointer for the SMP case. This will cause a problem
>> for ost_setup which reads the nodemask directly. Instead
>> we create a UMP version of cfs_cpt_nodemask and use that
>> in ost_setup.
>> 
>> Signed-off-by: James Simmons <uja.ornl@gmail.com>
>> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4199
>> Reviewed-on: http://review.whamcloud.com/9219
>> Reviewed-by: Liang Zhen <liang.zhen@intel.com>
>> Reviewed-by: Li Xi <pkuelelixi@gmail.com>
>> Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
>> 
>> Starting in 3.14 kernels nodemask_t was changed from a
>> a unsigned long to a linux bitmap so more than 32 cores
>> could be supported. Using set_bit in cfs_cpt_table_alloc
>> no longer compiles so this patch backports bits of the
>> node management function that use a linux bitmap back
>> end. Cleaned up libcfs bitmap.h to use the libcfs layers
>> memory allocation function. This was pulling in lustre
>> related code that was not defined.
>> 
>> Signed-off-by: James Simmons <uja.ornl@gmail.com>
>> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4993
>> Reviewed-on: http://review.whamcloud.com/10332
>> Reviewed-by: Liang Zhen <liang.zhen@intel.com>
>> Reviewed-by: Bob Glossman <bob.glossman@intel.com>
>> Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
>
>What is with this crazy two sections of signed-off-by?  If this was 2
>patches, make it two patches.
>
>If not, then don't do this.
>
>Also, this whole series had no numbering, so I don't know how to apply
>them, please fix and resend it.

I suspect that this is merging two separate patches so that they do not
introduce a regression when landed to master.  In the past you've said
you wanted fix patches merged into the original patch for this reason.

I guess the right thing to do is to merge the Signed-off-by: lines at
the end of the combined patch, rather than just mashing the commit
messages together.

Cheers, Andreas
-- 
Andreas Dilger

Lustre Principal Architect
Intel High Performance Data Division


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