From: Bruce Richardson <bruce.richardson@intel.com>
To: Tyler Retzlaff <roretzla@linux.microsoft.com>
Cc: <dev@dpdk.org>, Andrew Boyer <andrew.boyer@amd.com>,
Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>,
Chenbo Xia <chenbox@nvidia.com>,
"Konstantin Ananyev" <konstantin.v.ananyev@yandex.ru>,
Maxime Coquelin <maxime.coquelin@redhat.com>,
<mb@smartsharesystems.com>
Subject: Re: [PATCH v2] RFC: replace GCC marker extension with C11 anonymous unions
Date: Tue, 13 Feb 2024 08:57:19 +0000 [thread overview]
Message-ID: <Zcsu7_5vWqwhXSYn@bricha3-mobl1.ger.corp.intel.com> (raw)
In-Reply-To: <1707806741-29694-1-git-send-email-roretzla@linux.microsoft.com>
On Mon, Feb 12, 2024 at 10:45:40PM -0800, Tyler Retzlaff wrote:
> The zero sized RTE_MARKER<n> typedefs are a GCC extension unsupported by
> MSVC. Replace the use of the RTE_MARKER typedefs with anonymous unions.
>
> Note:
>
> v1 of the series tried to maintain the API after some study it has been
> discovered that some existing uses of the markers do not produce compilation
> failure but evaluate to unintended values in the absence of adaptation.
> For this reason the existing markers cannot be removed because it is too hard
> to identify what needs to be changed by consumers. While the ABI has been
> maintained the subtle API change is just too risky.
>
> The question I'm asking now is how to gracefully deprecate the markers
> while allowing consumption of the struct on Windows.
>
> I propose the following:
>
> * Introduce the unions as per-this series except instead of adding members
> that match the original RTE_MARKER field names provide *new* names.
> * Retain (conditionally compiled away on Windows) the existing RTE_MARKER
> fields with their original names.
> * Convert in-tree code to use the new names in the unions.
>
> The old names & markers would be announced for deprecation and eventually
> removed and when they are the conditional compilation would also go away.
>
> Thoughts?
>
This seems a good approach. +1 from me for the idea.
/Bruce
next prev parent reply other threads:[~2024-02-13 8:57 UTC|newest]
Thread overview: 171+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-30 23:26 [PATCH] " Tyler Retzlaff
2024-01-30 23:26 ` [PATCH] mbuf: " Tyler Retzlaff
2024-01-31 9:18 ` Morten Brørup
2024-01-31 21:09 ` Tyler Retzlaff
2024-01-31 22:39 ` Morten Brørup
2024-01-31 13:49 ` Bruce Richardson
2024-01-31 20:45 ` Tyler Retzlaff
2024-01-31 22:55 ` Morten Brørup
2024-02-13 6:45 ` [PATCH v2] RFC: " Tyler Retzlaff
2024-02-13 6:45 ` [PATCH v2] mbuf: " Tyler Retzlaff
2024-02-13 16:58 ` Morten Brørup
2024-02-13 18:48 ` Tyler Retzlaff
2024-02-13 19:27 ` Morten Brørup
2024-02-13 20:00 ` Tyler Retzlaff
2024-02-13 8:57 ` Bruce Richardson [this message]
2024-02-13 17:09 ` [PATCH v2] RFC: " Morten Brørup
2024-02-13 23:33 ` [PATCH v3] RFC deprecate RTE_MARKER in struct rte_mbuf Tyler Retzlaff
2024-02-13 23:33 ` [PATCH v3] mbuf: deprecate GCC marker in rte mbuf struct Tyler Retzlaff
2024-02-14 10:46 ` Morten Brørup
2024-02-14 20:16 ` Tyler Retzlaff
2024-02-14 10:49 ` [PATCH v3] RFC deprecate RTE_MARKER in struct rte_mbuf Morten Brørup
2024-02-26 1:18 ` Stephen Hemminger
2024-02-15 6:21 ` [PATCH v4 00/18] stop using zero sized marker fields Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 01/18] mbuf: deprecate GCC marker in rte mbuf struct Tyler Retzlaff
2024-02-18 2:28 ` fengchengwen
2024-02-18 12:39 ` Thomas Monjalon
2024-02-18 13:07 ` Morten Brørup
2024-02-18 15:22 ` Thomas Monjalon
2024-02-18 16:20 ` Morten Brørup
2024-02-20 17:24 ` Tyler Retzlaff
2024-02-20 17:20 ` Tyler Retzlaff
2024-02-20 17:53 ` Thomas Monjalon
2024-02-20 19:16 ` Thomas Monjalon
2024-02-20 19:37 ` Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 02/18] mbuf: stop using zero sized marker fields Tyler Retzlaff
2024-02-18 2:38 ` fengchengwen
2024-02-15 6:21 ` [PATCH v4 03/18] net/i40e: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 04/18] net/iavf: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 05/18] net/ice: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 06/18] net/ixgbe: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 07/18] net/mlx5: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 08/18] net/sfc: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 09/18] net/bnxt: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 10/18] net/enic: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 11/18] net/fm10k: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 12/18] net/hns3: " Tyler Retzlaff
2024-02-18 3:00 ` fengchengwen
2024-02-15 6:21 ` [PATCH v4 13/18] net/ionic: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 14/18] net/thunderx: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 15/18] net/virtio: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 16/18] net/cnxk: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 17/18] common/idpf: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 18/18] examples/dma: " Tyler Retzlaff
2024-02-15 9:37 ` [PATCH v4 00/18] " Morten Brørup
2024-02-24 8:21 ` [PATCH v5 00/22] stop using RTE_MARKER extensions Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 01/22] eal: provide macro to expand marker extensions Tyler Retzlaff
2024-02-24 10:51 ` Thomas Monjalon
2024-02-24 11:18 ` Thomas Monjalon
2024-02-24 8:21 ` [PATCH v5 02/22] mbuf: expand rte markers empty when building with MSVC Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 03/22] security: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 04/22] cryptodev: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 05/22] mbuf: stop using mbuf cacheline marker fields Tyler Retzlaff
2024-02-24 10:58 ` Thomas Monjalon
2024-02-26 18:20 ` Stephen Hemminger
2024-02-24 8:21 ` [PATCH v5 06/22] mbuf: add mbuf descriptor accessors Tyler Retzlaff
2024-02-24 11:01 ` Thomas Monjalon
2024-02-24 8:21 ` [PATCH v5 07/22] common/idpf: use " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 08/22] net/bnxt: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 09/22] net/cnxk: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 10/22] net/enic: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 11/22] net/fm10k: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 12/22] net/hns3: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 13/22] net/i40e: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 14/22] net/iavf: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 15/22] net/ice: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 16/22] net/ionic: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 17/22] net/ixgbe: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 18/22] net/mlx5: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 19/22] net/octeon_ep: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 20/22] net/sfc: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 21/22] net/thunderx: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 22/22] net/virtio: " Tyler Retzlaff
2024-02-24 10:42 ` [PATCH v5 00/22] stop using RTE_MARKER extensions Morten Brørup
2024-02-24 11:13 ` Thomas Monjalon
2024-02-24 11:23 ` Morten Brørup
2024-02-27 5:41 ` [PATCH v6 00/23] stop and remove RTE_MARKER typedefs Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 01/23] mbuf: add accessors for rearm and Rx descriptor fields Tyler Retzlaff
2024-02-27 9:10 ` Morten Brørup
2024-02-27 17:17 ` Tyler Retzlaff
2024-02-28 8:28 ` Morten Brørup
2024-02-28 16:20 ` Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 02/23] mbuf: consolidate driver asserts for mbuf struct Tyler Retzlaff
2024-02-27 10:02 ` Konstantin Ananyev
2024-03-14 16:51 ` Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 03/23] common/idpf: use mbuf descriptor accessors Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 04/23] net/bnxt: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 05/23] net/cnxk: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 06/23] net/enic: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 07/23] net/fm10k: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 08/23] net/hns3: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 09/23] net/i40e: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 10/23] net/iavf: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 11/23] net/ice: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 12/23] net/ionic: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 13/23] net/ixgbe: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 14/23] net/mlx5: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 15/23] net/octeon_ep: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 16/23] net/sfc: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 17/23] net/thunderx: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 18/23] net/virtio: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 19/23] examples/dma: use mbuf descriptor accessor Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 20/23] mbuf: remove and stop using rte marker fields Tyler Retzlaff
2024-02-27 9:15 ` Morten Brørup
2024-02-27 10:03 ` Konstantin Ananyev
2024-02-27 15:18 ` David Marchand
2024-02-27 16:04 ` Morten Brørup
2024-02-27 17:23 ` Tyler Retzlaff
2024-02-28 10:42 ` David Marchand
2024-02-28 14:03 ` Dodji Seketeli
2024-02-28 14:43 ` David Marchand
2024-02-29 14:50 ` Dodji Seketeli
2024-02-28 14:18 ` David Marchand
2024-02-28 15:01 ` Morten Brørup
2024-02-28 15:33 ` David Marchand
2024-02-28 17:20 ` Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 21/23] security: remove " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 22/23] cryptodev: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 23/23] devtools: forbid new use of rte marker typedefs Tyler Retzlaff
2024-03-20 22:01 ` [PATCH v7 0/4] remove use of RTE_MARKER fields in libraries Tyler Retzlaff
2024-03-20 22:01 ` [PATCH v7 1/4] net/i40e: use inline prefetch function Tyler Retzlaff
2024-03-26 10:16 ` Morten Brørup
2024-03-27 18:14 ` Tyler Retzlaff
2024-03-27 19:45 ` Morten Brørup
2024-03-20 22:01 ` [PATCH v7 2/4] mbuf: remove rte marker fields Tyler Retzlaff
2024-03-21 10:32 ` Bruce Richardson
2024-03-21 15:31 ` Tyler Retzlaff
2024-03-21 16:19 ` Morten Brørup
2024-03-26 11:12 ` Morten Brørup
2024-03-20 22:01 ` [PATCH v7 3/4] security: " Tyler Retzlaff
2024-03-26 10:28 ` Morten Brørup
2024-03-27 19:59 ` Tyler Retzlaff
2024-03-20 22:01 ` [PATCH v7 4/4] cryptodev: " Tyler Retzlaff
2024-03-26 10:31 ` Morten Brørup
2024-03-27 19:56 ` [PATCH v8 0/4] remove use of RTE_MARKER fields in libraries Tyler Retzlaff
2024-03-27 19:56 ` [PATCH v8 1/4] net/i40e: use inline prefetch function Tyler Retzlaff
2024-03-27 19:56 ` [PATCH v8 2/4] mbuf: remove rte marker fields Tyler Retzlaff
2024-03-27 19:56 ` [PATCH v8 3/4] security: " Tyler Retzlaff
2024-03-27 19:56 ` [PATCH v8 4/4] cryptodev: " Tyler Retzlaff
2024-04-02 20:08 ` [PATCH v9 0/4] remove use of RTE_MARKER fields in libraries Tyler Retzlaff
2024-04-02 20:08 ` [PATCH v9 1/4] net/i40e: use inline prefetch function Tyler Retzlaff
2024-04-02 20:08 ` [PATCH v9 2/4] mbuf: remove rte marker fields Tyler Retzlaff
2024-04-02 20:45 ` Stephen Hemminger
2024-04-02 20:51 ` Tyler Retzlaff
2024-04-02 20:08 ` [PATCH v9 3/4] security: " Tyler Retzlaff
2024-04-02 20:08 ` [PATCH v9 4/4] cryptodev: " Tyler Retzlaff
2024-04-03 17:53 ` [PATCH v10 0/4] remove use of RTE_MARKER fields in libraries Tyler Retzlaff
2024-04-03 17:53 ` [PATCH v10 1/4] net/i40e: use inline prefetch function Tyler Retzlaff
2024-04-03 21:49 ` Stephen Hemminger
2024-04-03 17:53 ` [PATCH v10 2/4] mbuf: remove rte marker fields Tyler Retzlaff
2024-04-03 19:32 ` Morten Brørup
2024-04-03 22:45 ` Tyler Retzlaff
2024-04-03 21:49 ` Stephen Hemminger
2024-04-03 17:53 ` [PATCH v10 3/4] security: " Tyler Retzlaff
2024-04-03 21:50 ` Stephen Hemminger
2024-04-03 17:53 ` [PATCH v10 4/4] cryptodev: " Tyler Retzlaff
2024-04-03 21:50 ` Stephen Hemminger
2024-04-04 17:51 ` [PATCH v11 0/4] remove use of RTE_MARKER fields in libraries Tyler Retzlaff
2024-04-04 17:51 ` [PATCH v11 1/4] net/i40e: use inline prefetch function Tyler Retzlaff
2024-04-04 17:51 ` [PATCH v11 2/4] mbuf: remove rte marker fields Tyler Retzlaff
2024-04-04 17:51 ` [PATCH v11 3/4] security: " Tyler Retzlaff
2024-04-04 17:51 ` [PATCH v11 4/4] cryptodev: " Tyler Retzlaff
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