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From: Thomas Monjalon <thomas@monjalon.net>
To: Luca Boccassi <bluca@debian.org>, Eelco Chaudron <echaudro@redhat.com>
Cc: Ferruh Yigit <ferruh.yigit@intel.com>,
	Neil Horman <nhorman@tuxdriver.com>,
	Cristian Dumitrescu <cristian.dumitrescu@intel.com>,
	dev@dpdk.org, David Marchand <david.marchand@redhat.com>,
	Bruce Richardson <bruce.richardson@intel.com>,
	Ian Stokes <ian.stokes@intel.com>,
	Andrzej Ostruszka <amo@semihalf.com>
Subject: Re: [dpdk-dev] [RFC v2] meter: fix ABI break due to experimental tag removal
Date: Thu, 30 Jan 2020 21:20:02 +0100	[thread overview]
Message-ID: <2254274.n0HT0TaD9V@xps> (raw)
In-Reply-To: <7465A5AB-87B6-465F-B794-799D562566BE@redhat.com>

30/01/2020 17:15, Eelco Chaudron:
> On 30 Jan 2020, at 17:04, Luca Boccassi wrote:
> > On Thu, 2020-01-30 at 16:55 +0100, Thomas Monjalon wrote:
> >> 30/01/2020 15:21, Luca Boccassi:
> >>> On Thu, 2020-01-30 at 15:17 +0100, Thomas Monjalon wrote:
> >>>> 30/01/2020 13:57, Luca Boccassi:
> >>>>> On Thu, 2020-01-30 at 13:33 +0100, Thomas Monjalon wrote:
> >>>>>> Hi,
> >>>>>>
> >>>>>> I disagree with the need of this patch.
> >>>>>> The symbol was experimental, meaning we can change it.
> >>>>>> Removing experimental tag is not an ABI break.
> >>>>>
> >>>>> Hi,
> >>>>>
> >>>>> This symbol change was requested for backport in 19.11.x, and
> >>>>> experimental or not I'm not too keen on backward incompatible
> >>>>> changes
> >>>>> to the public interface in an _LTS point release_. The
> >>>>> compromise
> >>>>> was
> >>>>> to see if we could support both symbols version, which makes
> >>>>> the
> >>>>> change
> >>>>> backward compatible.
> >>>>>
> >>>>> If you prefer not to have this patch in mainline I'm also fine
> >>>>> in
> >>>>> taking it just for the LTS. I agree with you that it is not
> >>>>> required
> >>>>> for mainline releases (although nicer for me if it's a backport
> >>>>> rather
> >>>>> than a new change).
> >>>>
> >>>> I would like to avoid opening the door for maintaining the
> >>>> experimental ABI
> >>>> in the mainline. Please take it directly in the LTS.
> >>>>
> >>>> The next question is to know whether we really want to have such
> >>>> patch in LTS.
> >>>> Anyway, 19.11.0 has this symbol as experimental.
> >>>> How adding a non-experimental version of the function in 19.11.1
> >>>> will
> >>>> change
> >>>> the ABI status of the whole 19.11 branch?
> >>>
> >>> The problem is not adding the new symbol, but removing the
> >>> experimental
> >>> one. Changing the version of the symbol was requested by OVS for
> >>> inclusion in 19.11.
> >>
> >> Yes, sorry, this is what I meant.
> >> Given 19.11.0 already has the symbol as experimental,
> >> and that applications like OVS had to accept it as experimental,
> >> why removing experimental tag in 19.11.1?
> >
> > I think it was mentioned that it was preferred not to suppress the
> > compiler warning to avoid any accidental use in the future, but the 
> > OVS
> > maintainer(s) should answer as I might remember wrongly.
> 
> Yes this is the reason, OVS compiles with -Werror so we would like to 
> avoid the warnings. You can not disable them per include, it’s global 
> for all of DPDK.

Yes but anyway OVS must accept the experimental function as the next release
will use it with DPDK 19.11.0.



  reply	other threads:[~2020-01-30 20:20 UTC|newest]

Thread overview: 71+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-29 12:29 [dpdk-dev] [RFC] " Ferruh Yigit
2020-01-29 14:46 ` Bruce Richardson
2020-01-29 14:57 ` Andrzej Ostruszka
2020-01-29 16:25   ` Ferruh Yigit
2020-01-29 16:30     ` Andrzej Ostruszka
2020-01-29 16:40       ` Ferruh Yigit
2020-01-29 16:43 ` [dpdk-dev] [RFC v2] " Ferruh Yigit
2020-01-29 17:49   ` Andrzej Ostruszka
2020-01-30 12:33   ` Thomas Monjalon
2020-01-30 12:57     ` Luca Boccassi
2020-01-30 14:17       ` Thomas Monjalon
2020-01-30 14:21         ` Luca Boccassi
2020-01-30 15:55           ` Thomas Monjalon
2020-01-30 16:04             ` Luca Boccassi
2020-01-30 16:15               ` Eelco Chaudron
2020-01-30 20:20                 ` Thomas Monjalon [this message]
2020-02-03 11:10                   ` Eelco Chaudron
2020-01-31  9:25     ` Ferruh Yigit
2020-05-13 12:11   ` [dpdk-dev] [PATCH] meter: provide experimental alias of API for old apps Ferruh Yigit
2020-05-13 16:30     ` Thomas Monjalon
2020-05-13 17:37       ` Ferruh Yigit
2020-05-13 18:05     ` [dpdk-dev] [PATCH v2] " Ferruh Yigit
2020-05-14  8:44       ` Ray Kinsella
2020-05-14 11:53         ` [dpdk-dev] [dpdk-stable] " Ferruh Yigit
2020-05-14 11:52     ` [dpdk-dev] [PATCH v3] " Ferruh Yigit
2020-05-14 15:10       ` Ray Kinsella
2020-05-14 15:32       ` David Marchand
2020-05-14 15:56         ` Ray Kinsella
2020-05-14 16:07         ` Ferruh Yigit
2020-05-14 16:30           ` David Marchand
2020-05-14 16:11     ` [dpdk-dev] [PATCH v4] " Ferruh Yigit
2020-05-15 13:31       ` Thomas Monjalon
2020-05-15 14:41         ` Ray Kinsella
2020-05-15 15:03         ` Ray Kinsella
2020-05-15 14:36       ` [dpdk-dev] [PATCH v5] abi: " Ray Kinsella
2020-05-15 15:01       ` [dpdk-dev] [PATCH v6] " Ray Kinsella
2020-05-16 11:53         ` Neil Horman
2020-05-18 17:18           ` Thomas Monjalon
2020-05-18 17:34             ` Ferruh Yigit
2020-05-18 17:51               ` Thomas Monjalon
2020-05-18 18:32                 ` Ferruh Yigit
2020-05-19 14:13                   ` Ray Kinsella
2020-05-19 14:14             ` Ray Kinsella
2020-05-17 19:52       ` [dpdk-dev] [PATCH v4] meter: " Dumitrescu, Cristian
2020-05-18  6:29         ` Ray Kinsella
2020-05-18  9:22           ` Thomas Monjalon
2020-05-18  9:30             ` Ray Kinsella
2020-05-18 10:46               ` Thomas Monjalon
2020-05-18 11:18                 ` Dumitrescu, Cristian
2020-05-18 11:49                   ` Ray Kinsella
2020-05-18 11:48                 ` Ray Kinsella
2020-05-18 12:13                   ` Thomas Monjalon
2020-05-18 13:06                     ` Ray Kinsella
2020-05-18 18:30     ` [dpdk-dev] [PATCH v5] " Ferruh Yigit
2020-05-19 12:16     ` [dpdk-dev] [PATCH v6] " Ferruh Yigit
2020-05-19 13:26       ` Dumitrescu, Cristian
2020-05-19 14:24         ` Thomas Monjalon
2020-05-19 14:22       ` Ray Kinsella
2020-02-02 18:53 ` [dpdk-dev] [RFC] meter: fix ABI break due to experimental tag removal Neil Horman
2020-02-03 12:53   ` Ferruh Yigit
2020-02-04 12:02     ` Neil Horman
2020-02-05 10:04       ` Luca Boccassi
2020-02-05 11:32         ` Neil Horman
2020-02-13 17:40           ` Ray Kinsella
2020-02-14  2:40             ` Neil Horman
2020-02-14 11:36               ` Bruce Richardson
2020-02-14 20:48                 ` Neil Horman
2020-02-14 21:52                   ` Bruce Richardson
2020-02-15 13:43                     ` Neil Horman
2020-02-17 14:23                   ` Ray Kinsella
2020-02-17 15:37                     ` Neil Horman

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