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    SubjectRe: [patch 3/9] mempool - Make mempools NUMA aware
    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?


    -Matt
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