lkml.org 
[lkml]   [2017]   [Sep]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v3 08/13] xen/pvcalls: implement accept command
On Mon, 14 Aug 2017, Boris Ostrovsky wrote:
> > > +
> > > + ret = bedata->rsp[req_id].ret;
> >
> > You can just return bedata->rsp[req_id].ret;
>
> Or maybe not. The slot may get reused by the time you get to the end.

Right!

> >
> > -boris
> >
> > > + /* read ret, then set this rsp slot to be reused */
> > > + smp_mb();
> > > + WRITE_ONCE(bedata->rsp[req_id].req_id, PVCALLS_INVALID_ID);
> > > + WRITE_ONCE(map->passive.inflight_req_id, PVCALLS_INVALID_ID);
> > > + return ret;
> > > +}
>

\
 
 \ /
  Last update: 2017-09-08 23:59    [W:0.123 / U:0.180 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site