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    SubjectRe: [RFC 00/15] x86_64: Optimize percpu accesses
    Eric W. Biederman wrote:
    > Christoph Lameter <cl@linux-foundation.org> writes:
    >
    >> H. Peter Anvin wrote:
    >>
    >>> but there is a distinct lack of wiggle room, which can be resolved
    >>> either by using negative offsets, or by moving the kernel text area up a
    >>> bit from -2 GB.
    >> Lets say we reserve 256MB of cpu alloc space per processor.
    >
    > First off right now reserving more than about 64KB is ridiculous. We rightly
    > don't have that many per cpu variables.

    Almost half a megabyte in current allyesconfig, and that is not
    including dynamic allocations at all.

    -hpa


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