svn commit: r351188 - in head/sys: kern sys

[Hans Petter Selasky]

On 2019-08-18 13:43, Jeff Roberson wrote:
> Author: jeff
> Date: Sun Aug 18 11:43:58 2019
> New Revision: 351188
> URL: https://svnweb.freebsd.org/changeset/base/351188
> 
> Log:
>    Add a blocking wait bit to refcount.  This allows refs to be used as a simple
>    barrier.
>    
>    Reviewed by:	markj, kib
>    Discussed with:	jhb
>    Sponsored by:	Netflix
>    Differential Revision:	https://reviews.freebsd.org/D21254
> 
> Modified:
>    head/sys/kern/kern_synch.c
>    head/sys/sys/refcount.h
> 

Hi,

I would like to decouple the wait/wakeup logic from the release 
function, if possible. The main objection here is that we are woken up 
before any destructor is executed. Also this function is not Giant safe 
and does neither assert that it can sleep.

--HPS