[lkml]   [2017]   [Oct]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH V8 5/8] percpu-refcount: introduce __percpu_ref_tryget_live
On Tue, Oct 03, 2017 at 06:40:24PM +0000, Bart Van Assche wrote:
> On Tue, 2017-10-03 at 22:04 +0800, Ming Lei wrote:
> > Block layer need to call this function after holding
> > rcu lock in a real hot path, so introduce this helper.
> Since it is allowed to nest rcu_read_lock_sched() calls I don't think
> that this patch is necessary.

Yeah, I know that, with this patch, we can avoid the nest RCU lock.
As I mentioned, it is a real hot path, so maybe better to not
introduce the extra RCU read lock/unlock.

If you guys doesn't care the little cost, I can remove that.


 \ /
  Last update: 2017-10-03 21:24    [W:0.065 / U:0.544 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site