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From: Tom Lane <[email protected]>
To: Andres Freund <[email protected]>
Cc: Michael Paquier <[email protected]>
Cc: Niyas Sait <[email protected]>
Cc: Ian Lawrence Barwick <[email protected]>
Cc: Thomas Munro <[email protected]>
Cc: Julien Rouhaud <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Cc: [email protected]
Cc: Jonathan S. Katz <[email protected]>
Cc: Alvaro Herrera <[email protected]>
Cc: Amit Kapila <[email protected]>
Subject: Re: [PATCH] Add native windows on arm64 support
Date: Mon, 08 May 2023 15:58:41 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
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Andres Freund <[email protected]> writes:
> I don't really have feelings either way - but haven't we gone further and even
> backpatched things like spinlock support for new arches in the past?

Mmmm ... don't really think those cases were comparable.  We weren't
adding support for a whole new OS.  Now, you might argue that Windows
on arm64 will be just like Windows on x86_64, but I think the jury
is still out on that.  Microsoft was so Intel-only for so many years
that I bet they've had to change quite a bit to make it go on ARM.

Also, the cases of back-patched spinlock support that I can find
in the last few years were pretty low-risk.  I'll grant that
c32fcac56 was a bit blue-sky because hardly anybody had RISC-V
at that point, but by the same token anybody relying on it at the
time would be dealing with a beta-grade OS too.  On the other hand,
1c72d82c2 was immediately testable in the buildfarm, and f3bd00c01
was importing code already verified by our OpenBSD packagers.

As I said upthread, this seems like something to put in at the
beginning of a dev cycle, not post-feature-freeze.

			regards, tom lane

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