Re: [patch 0/9] Critical Mempools

[Matthew Dobson <colpatch@us.ibm.com>]

Christoph Lameter wrote:
> On Wed, 25 Jan 2006, Matthew Dobson wrote:
> 
> 
>>Using this new approach, a subsystem can create a mempool and then pass a
>>pointer to this mempool on to all its slab allocations.  Anytime one of its
>>slab allocations needs to allocate memory that memory will be allocated
>>through the specified mempool, rather than through alloc_pages_node() directly.
> 
> 
> All subsystems will now get more complicated by having to add this 
> emergency functionality?

Certainly not.  Only subsystems that want to use emergency pools will get
more complicated.  If you have a suggestion as to how to implement a
similar feature that is completely transparent to its users, I would *love*
to hear it.  I have tried to keep the changes to implement this
functionality to a minimum.  As the patches currently stand, existing slab
allocator and mempool users can continue using these subsystems without
modification.


>>Feedback on these patches (against 2.6.16-rc1) would be greatly appreciated.
> 
> 
> There surely must be a better way than revising all subsystems for 
> critical allocations.

Again, I could not find any way to implement this functionality without
forcing the users of the functionality to make some, albeit very minor,
changes.  Specific suggestions are more than welcome! :)

Thanks!

-Matt