[lkml]   [2009]   [Jul]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [RFC PATCH] kmemleak: Scan all thread stacks
    On Fri, 2009-07-17 at 18:43 +0200, Ingo Molnar wrote:
    > * Catalin Marinas <> wrote:
    > > 2. Is it safe to use rcu_read_lock() and task_lock() when scanning the
    > > corresponding kernel stack (thread_info structure)? The loop doesn't
    > > do any modification to the task list. The reason for this is to
    > > allow kernel preemption when scanning the stacks.
    > you cannot generally preempt while holding the RCU read-lock.

    This may work with rcupreempt enabled. But, with classic RCU is it safe
    to call schedule (or cond_resched) while holding the RCU read-lock?



     \ /
      Last update: 2009-07-17 18:59    [W:0.020 / U:19.408 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site