lkml.org 
[lkml]   [2018]   [Jul]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH V2 16/19] csky: SMP support
On Fri, Jul 06, 2018 at 02:07:40PM +0800, Guo Ren wrote:

> > Please explain those mb()'s... I'm thinking you meant to use smp_mb().
> Yes, smp_mb(). Current smp_mb()&mb() is the same: sync.is.
>
> In next version patch, I'll seperate smp_mb() and mb() and use ld/st.barrier
> instead of sync.is. Sync.is is expensive that it flush cpu's pipeline.

I'll second my own call for documentation, because now there's three
memory ordering instructions:

"SYNC", "SYNC.IS" and "LD/ST.BARRIER"

None of which have yet been explained.

\
 
 \ /
  Last update: 2018-07-06 11:40    [W:0.182 / U:0.984 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site