Re: [Xen-devel] [PATCH v4 5/8] spinlock: Introduce spin_lock_cb()

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 19.05.17 at 17:50, <boris.ostrovsky@xxxxxxxxxx> wrote:
> @@ -140,6 +140,8 @@ void _spin_lock(spinlock_t *lock)
>      while ( tickets.tail != observe_head(&lock->tickets) )
>      {
>          LOCK_PROFILE_BLOCK;
> +        if ( unlikely(cb) )
> +            cb(data);

The description says "periodically", which to me implies every once
in a while, not on every iteration. Not a big problem, bit I wanted to
mention it anyway.

Jan


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