[lkml]   [2009]   [Nov]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH 2.6.32-rc6] sched, kvm: fix race condition involving sched_in_preempt_notifers

    * Tejun Heo <> wrote:

    > In finish_task_switch(), fire_sched_in_preempt_notifiers() is called
    > after finish_lock_switch(). However, depending on architecture,
    > preemption can be enabled after finish_lock_switch() which breaks the
    > semantics of preempt notifiers. Move it before finish_arch_switch().
    > This also makes in notifiers symmetric to out notifiers in terms of
    > locking - now both are called under rq lock.
    > Cc: Ingo Molnar <>
    > Cc: Avi Kivity <>
    > ---
    > Avi, I think kvm should be fine with this but I haven't tested it.
    > Does this look okay to you? If so, can you please route this through
    > kvm tree with my signoff?

    I'd like to have Avi's Ack for it, but we want to do sched.c changes via
    the scheduler tree.


     \ /
      Last update: 2009-11-13 10:59    [W:0.022 / U:3.304 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site