[lkml]   [2011]   [Feb]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH RFC tip/core/rcu 11/11] rcu: move TREE_RCU from softirq to kthread
    On Wed, 23 Feb 2011, Paul E. McKenney wrote:

    > These do introduce redundant preempt_disable()/preempt_enable() calls, but
    > this is not on a fastpath, so should be OK, and the improved readability
    > is certainly nice. The read and the write do need to happen on the same
    > CPU, FWIW.

    this_cpu_xxx only use preempt_enable/disable() on platforms that do not
    support per cpu atomic instructions. On x86 no preempt enable/disable will
    be inserted.

    You can also use the __this_cpu_xxx operations which never add preempt
    disable/enable because they expect the caller to deal with preemption.

     \ /
      Last update: 2011-02-23 20:25    [W:0.032 / U:7.956 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site