Horton

Re: Proposal for Updating CRC32C with AVX-512 Algorithm.

Bruce Momjian <bruce@momjian.us>

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From: Bruce Momjian <bruce@momjian.us>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: "Amonson, Paul D" <paul.d.amonson@intel.com>, Daniel Gustafsson <daniel@yesql.se>, "pgsql-hackers@lists.postgresql.org" <pgsql-hackers@lists.postgresql.org>, Nathan Bossart <nathandbossart@gmail.com>, "Shankaran, Akash" <akash.shankaran@intel.com>
Date: 2024-06-12T18:24:57Z
Lists: pgsql-hackers

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  1. Compute CRC32C using AVX-512 instructions where available

On Wed, Jun 12, 2024 at 02:08:02PM -0400, Tom Lane wrote:
> "Amonson, Paul D" <paul.d.amonson@intel.com> writes:
> > I had our OSS internal team, who are experts in OSS licensing, review possible conflicts between the PostgreSQL license and the BSD-Clause 3-like license for the CRC32C AVX-512 code, and they found no issues. Therefore, including the new license into the PostgreSQL codebase should be acceptable.
> 
> Maybe you should get some actual lawyers to answer this type of
> question.  The Chromium license this code cites is 3-clause-BSD
> style, which is NOT compatible: the "advertising" clause is
> significant.
> 
> In any case, writing copyright notices that are pointers to
> external web pages is not how it's done around here.  We generally
> operate on the assumption that the Postgres source code will
> outlive any specific web site.  Dead links to incidental material
> might be okay, but legally relevant stuff not so much.

Agreed.  The licenses are compatible in the sense that they can be
combined to create a unified work, but they cannot be combined without
modifying the license of the combined work.  You would need to combine
the Postgres and Chrome license for this, and I highly doubt we are
going to be modifying the Postgres for this.

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EDB                                      https://enterprisedb.com

  Only you can decide what is important to you.