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
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