On Wed, Sep 06, 2017 at 04:19:04PM +0200, David Sterba wrote:
> On Fri, Sep 01, 2017 at 04:14:27PM -0600, Liu Bo wrote:
> > wake_up() will go to check whether someone is on the waiting list with
> > holding spin_lock().
> >
> > Around some btrfs code, we don't check waitqueue_active() firstly, so
>
On Fri, Sep 01, 2017 at 04:14:27PM -0600, Liu Bo wrote:
> wake_up() will go to check whether someone is on the waiting list with
> holding spin_lock().
>
> Around some btrfs code, we don't check waitqueue_active() firstly, so
> the spin_lock() pair in wake_up() is called even if no one is waiting
>
wake_up() will go to check whether someone is on the waiting list with
holding spin_lock().
Around some btrfs code, we don't check waitqueue_active() firstly, so
the spin_lock() pair in wake_up() is called even if no one is waiting
on the queue.
There are more wake_up()s without waitqueue_active(
