[lkml]   [2009]   [Apr]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH UPDATED] percpu: use dynamic percpu allocator as the default percpu allocator
    On Thu, 2 Apr 2009, Ingo Molnar wrote:

    > You didnt really answer to my suggestion(s) though. You only stated
    > that:
    > "problem XYZ is something normal that comes with the cpu caching
    > schemes. As long as there is no significant impact on
    > performance weare fine with it."
    > Which i'd proffer is true for any given value of XYZ ;-)

    Nope. If XYZ is a significant performance issue then we are not fine with
    XYZ. __read_mostly was introduced to deal with signficant false aliasing

    False aliasing can be set to occur anytime you place two variables in the
    same cacheline. That is by design in the current cacheline schemes. One
    would not place a variable in a separate cacheline without good

     \ /
      Last update: 2009-04-02 05:37    [W:0.020 / U:0.844 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site