[PATCH 0/3] kdump: add support for ibm, dynamic-reconfiguration-memory for kexec/kdump

[PATCH 0/3] kdump: add support for ibm, dynamic-reconfiguration-memory for kexec/kdump

[Chandru]

/proc/device-tree on power6 machines has ibm,dynamic-reconfiguration-memory 
node which stores in it the memory representation for most part of the system 
memory. This memory was earlier represented in 'memory@' nodes of the device 
tree.  Following patch series makes kexec-tools aware of this dynamic 
reconfiguration memory node. These patches were sent earlier for RFC. In 
addition to this, a change in the kernel was also required. The kernel change 
has been accepted in powerpc git tree. 
http://git.kernel.org/?p=linux/kernel/git/paulus/powerpc.git;a=commit;h=cf00085d8045cddd80a8aabad97de96fa8131793
Some part of the patch here is re-organization of the existing code to 
accommodate dynamic reconf memory. 

Chandru


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Re: [PATCH 0/3] kdump: add support for ibm, dynamic-reconfiguration-memory for kexec/kdump

[Sachin P. Sant]

Chandru wrote:
> /proc/device-tree on power6 machines has ibm,dynamic-reconfiguration-memory 
> node which stores in it the memory representation for most part of the system 
> memory. This memory was earlier represented in 'memory@' nodes of the device 
> tree.  Following patch series makes kexec-tools aware of this dynamic 
> reconfiguration memory node. These patches were sent earlier for RFC. In 
> addition to this, a change in the kernel was also required. The kernel change 
> has been accepted in powerpc git tree. 
> http://git.kernel.org/?p=linux/kernel/git/paulus/powerpc.git;a=commit;h=cf00085d8045cddd80a8aabad97de96fa8131793
> Some part of the patch here is re-organization of the existing code to 
> accommodate dynamic reconf memory. 
>
>   
I tested this patch series on a ppc64 box and they work fine.
Without these patches i get a zero size vmcore on a power(power6)
box which has support for dynamic-reconfiguration-memory.

Horms could you please consider this patch series and merge them
if found suitable.

Regards
-Sachin


-- 

---------------------------------
Sachin Sant
IBM Linux Technology Center
India Systems and Technology Labs
Bangalore, India
---------------------------------


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Re: [PATCH 0/3] kdump: add support for ibm, dynamic-reconfiguration-memory for kexec/kdump

[Simon Horman]

On Tue, Sep 30, 2008 at 04:08:13PM +0530, Sachin P. Sant wrote:
> Chandru wrote:
>> /proc/device-tree on power6 machines has 
>> ibm,dynamic-reconfiguration-memory node which stores in it the memory 
>> representation for most part of the system memory. This memory was 
>> earlier represented in 'memory@' nodes of the device tree.  Following 
>> patch series makes kexec-tools aware of this dynamic reconfiguration 
>> memory node. These patches were sent earlier for RFC. In addition to 
>> this, a change in the kernel was also required. The kernel change has 
>> been accepted in powerpc git tree.  
>> http://git.kernel.org/?p=linux/kernel/git/paulus/powerpc.git;a=commit;h=cf00085d8045cddd80a8aabad97de96fa8131793
>> Some part of the patch here is re-organization of the existing code to  
>> accommodate dynamic reconf memory. 
>>
>>   
> I tested this patch series on a ppc64 box and they work fine.
> Without these patches i get a zero size vmcore on a power(power6)
> box which has support for dynamic-reconfiguration-memory.
>
> Horms could you please consider this patch series and merge them
> if found suitable.

Thanks for your review, it is most helpful.

Sorry to all for being a little slow with this.
Apart from some very minor nits about patch ordering
that I emailed about just now, I am also fine with this series.

-- 
Simon Horman
  VA Linux Systems Japan K.K., Sydney, Australia Satellite Office
  H: www.vergenet.net/~horms/             W: www.valinux.co.jp/en


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Re: [PATCH 0/3] kdump: add support for ibm, dynamic-reconfiguration-memory for kexec/kdump

[Simon Horman]

On Wed, Oct 08, 2008 at 12:59:28PM +1100, Simon Horman wrote:
> On Tue, Sep 30, 2008 at 04:08:13PM +0530, Sachin P. Sant wrote:
> > Chandru wrote:
> >> /proc/device-tree on power6 machines has 
> >> ibm,dynamic-reconfiguration-memory node which stores in it the memory 
> >> representation for most part of the system memory. This memory was 
> >> earlier represented in 'memory@' nodes of the device tree.  Following 
> >> patch series makes kexec-tools aware of this dynamic reconfiguration 
> >> memory node. These patches were sent earlier for RFC. In addition to 
> >> this, a change in the kernel was also required. The kernel change has 
> >> been accepted in powerpc git tree.  
> >> http://git.kernel.org/?p=linux/kernel/git/paulus/powerpc.git;a=commit;h=cf00085d8045cddd80a8aabad97de96fa8131793
> >> Some part of the patch here is re-organization of the existing code to  
> >> accommodate dynamic reconf memory. 
> >>
> >>   
> > I tested this patch series on a ppc64 box and they work fine.
> > Without these patches i get a zero size vmcore on a power(power6)
> > box which has support for dynamic-reconfiguration-memory.
> >
> > Horms could you please consider this patch series and merge them
> > if found suitable.
> 
> Thanks for your review, it is most helpful.
> 
> Sorry to all for being a little slow with this.
> Apart from some very minor nits about patch ordering
> that I emailed about just now, I am also fine with this series.

After some further discussion with Chandru I have applied this
series as is.

Thanks to all involved.

-- 
Simon Horman
  VA Linux Systems Japan K.K., Sydney, Australia Satellite Office
  H: www.vergenet.net/~horms/             W: www.valinux.co.jp/en


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