Messages in this thread | | | Date | Thu, 26 Jan 2006 16:44:56 -0800 | From | Matthew Dobson <> | Subject | Re: [patch 3/9] mempool - Make mempools NUMA aware |
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Christoph Lameter wrote: > On Thu, 26 Jan 2006, Matthew Dobson wrote: > > >>That seems a bit beyond the scope of what I'd hoped for this patch series, >>but if an approach like this is believed to be generally useful, it's >>something I'm more than willing to work on... > > > We need this for other issues as well. f.e. to establish memory allocation > policies for the page cache, tmpfs and various other needs. Look at > mempolicy.h which defines a subset of what we need. Currently there is no > way to specify a policy when invoking the page allocator or slab > allocator. The policy is implicily fetched from the current task structure > which is not optimal.
I agree that the current, task-based policies are subobtimal. Having to allocate and fill in even a small structure for each allocation is going to be a tough sell, though. I suppose most allocations could get by with a small handfull of static generic "policy structures"... This seems like it will turn into a signifcant rework of all the kernel's allocation routines, no small task. Certainly not something that I'd even start without response from some other major players in the VM area... Anyone?
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