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    SubjectRe: [RFC PATCH -rt 1/2] RCU priority boosting that survives vicious testing

    * Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote:

    > Here is the RCU priority-boosting patch. Pretty close to the
    > http://lkml.org/lkml/2007/1/24/295 version. This patch prevents
    > preempted or blocked low-priority RCU readers from indefinitely
    > stalling RCU grace periods.

    thanks - i've applied both patches to -rt and it's looking good so far!
    Find a small cosmetic fix below.

    Ingo

    Index: linux/kernel/rcupreempt.c
    ===================================================================
    --- linux.orig/kernel/rcupreempt.c
    +++ linux/kernel/rcupreempt.c
    @@ -489,7 +489,7 @@ void init_rcu_boost_late(void)
    rcu_boost_task = kthread_run(rcu_booster, NULL, "RCU Prio Booster");
    if (IS_ERR(rcu_boost_task)) {
    printk(KERN_ALERT
    - "Unable to create RCU Priority Booster, errno %d\n",
    + "Unable to create RCU Priority Booster, errno %ld\n",
    -PTR_ERR(rcu_boost_task));

    /*
    -
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