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From: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>
To: David Marchand <david.marchand@redhat.com>,
	"Richardson, Bruce" <bruce.richardson@intel.com>
Cc: dev <dev@dpdk.org>, Olivier Matz <olivier.matz@6wind.com>,
	"Stephen Hemminger" <stephen@networkplumber.org>,
	David Christensen <drc@linux.vnet.ibm.com>,
	Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
	"Ruifeng Wang (Arm Technology China)" <Ruifeng.Wang@arm.com>,
	nd <nd@arm.com>, Ray Kinsella <mdr@ashroe.eu>,
	"Neil Horman" <nhorman@tuxdriver.com>,
	"Mcnamara, John" <john.mcnamara@intel.com>,
	"Kovacevic, Marko" <marko.kovacevic@intel.com>,
	Phil Yang <phil.yang@arm.com>
Subject: Re: [dpdk-dev] [PATCH v5 2/2] doc: announce deprecation of refcnt atomic member
Date: Fri, 17 Jul 2020 16:06:56 +0000
Message-ID: <BYAPR11MB3301072F918935ED314D63479A7C0@BYAPR11MB3301.namprd11.prod.outlook.com> (raw)
In-Reply-To: <CAJFAV8wjnQ3-eF_GRBf_39-YfBUHpVb3PEVFdY3GcE2da1T=+g@mail.gmail.com>

Hi David,
 
> On Fri, Jul 17, 2020 at 4:32 PM David Marchand
> <david.marchand@redhat.com> wrote:
> >
> > On Fri, Jul 17, 2020 at 6:37 AM Phil Yang <phil.yang@arm.com> wrote:
> > >
> > > refcnt_atomic member in structures rte_mbuf and rte_mbuf_ext_shared_info
> > > will be deprecated in 20.11 release.
> > >
> > > Suggested-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
> > > Signed-off-by: Phil Yang <phil.yang@arm.com>
> > > Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> > > ---
> > >  doc/guides/rel_notes/deprecation.rst | 6 ++++++
> > >  1 file changed, 6 insertions(+)
> > >
> > > diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
> > > index a58a179..99c9806 100644
> > > --- a/doc/guides/rel_notes/deprecation.rst
> > > +++ b/doc/guides/rel_notes/deprecation.rst
> > > @@ -129,6 +129,12 @@ Deprecation Notices
> > >    in "rte_sched.h". These changes are aligned to improvements suggested in the
> > >    RFC https://mails.dpdk.org/archives/dev/2018-November/120035.html.
> > >
> > > +* mbuf: ``refcnt_atomic`` member in structures ``rte_mbuf`` and
> > > +  ``rte_mbuf_ext_shared_info`` is of type ``rte_atomic16_t``. Due to adoption
> > > +  of C11 atomic builtins it will be of type ``uint16_t``. ``refcnt_atomic``
> > > +  will be removed in 20.11. It will be replaced with ``refcnt`` of type
> > > +  ``uint16_t``.
> > > +
> > >  * metrics: The function ``rte_metrics_init`` will have a non-void return
> > >    in order to notify errors instead of calling ``rte_exit``.
> > >
> > > --
> > > 2.7.4
> > >
> >
> > Acked-by: David Marchand <david.marchand@redhat.com>
> 
> Bruce, Konstantin,
> 
> This precedes the first open source release so trying with you guys:
> what is the purpose of the RTE_MBUF_REFCNT_ATOMIC build flag?
> Thanks.
> 

As I remember it was possible to build/run DPDK with non-atomic refcnt,
i.e. each lcore manages/works with its own mempools.
Don't know does anyone yet rely on that feature.
  


  reply	other threads:[~2020-07-17 16:07 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-11 10:26 [dpdk-dev] [PATCH] mbuf: use c11 atomics for refcnt operations Phil Yang
2020-07-03 15:38 ` David Marchand
2020-07-06  8:03   ` Phil Yang
2020-07-07 10:10 ` [dpdk-dev] [PATCH v2] mbuf: use C11 " Phil Yang
2020-07-07 17:13   ` Stephen Hemminger
2020-07-08  4:48     ` Phil Yang
2020-07-08 11:43       ` Olivier Matz
2020-07-09  9:52         ` Phil Yang
2020-07-08  5:11   ` Phil Yang
2020-07-08 11:44   ` Olivier Matz
2020-07-09 10:00     ` Phil Yang
2020-07-09 10:10   ` [dpdk-dev] [PATCH v3] mbuf: use C11 atomic built-ins " Phil Yang
2020-07-09 11:03     ` Olivier Matz
2020-07-09 13:00       ` Phil Yang
2020-07-09 13:31         ` Honnappa Nagarahalli
2020-07-09 14:10           ` Phil Yang
2020-07-09 15:58     ` [dpdk-dev] [PATCH v4 1/2] " Phil Yang
2020-07-09 15:58       ` [dpdk-dev] [PATCH v4 2/2] doc: announce deprecation of refcnt atomic member Phil Yang
2020-07-10  2:55         ` Ruifeng Wang
2020-07-13 15:54           ` Phil Yang
2020-07-14 10:41         ` Ananyev, Konstantin
2020-07-15 12:29       ` [dpdk-dev] [PATCH v4 1/2] mbuf: use C11 atomic built-ins for refcnt operations David Marchand
2020-07-15 12:49         ` Aaron Conole
2020-07-15 16:29         ` Phil Yang
2020-07-16  4:16         ` Phil Yang
2020-07-16 11:30           ` David Marchand
2020-07-16 13:20             ` Dodji Seketeli
2020-07-16 19:11               ` David Marchand
2020-07-17  4:41                 ` Phil Yang
2020-07-16 11:32       ` Olivier Matz
2020-07-17  4:36       ` [dpdk-dev] [PATCH v5 1/2] mbuf: use C11 atomic builtins " Phil Yang
2020-07-17  4:36         ` [dpdk-dev] [PATCH v5 2/2] doc: announce deprecation of refcnt atomic member Phil Yang
2020-07-17 11:45           ` Olivier Matz
2020-07-17 14:32           ` David Marchand
2020-07-17 14:35             ` David Marchand
2020-07-17 16:06               ` Ananyev, Konstantin [this message]
2020-07-17 16:20               ` Bruce Richardson
2020-07-21  8:35                 ` David Marchand
2020-07-21  8:48                   ` Ananyev, Konstantin
2020-07-21  8:37         ` [dpdk-dev] [PATCH v5 1/2] mbuf: use C11 atomic builtins for refcnt operations David Marchand

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