From: Tom Lane <tgl@sss.pgh.pa.us>
To: Thomas Munro <thomas.munro@enterprisedb.com>
Cc: Amit Kapila <amit.kapila16@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Cc: Heikki Linnakangas <hlinnaka@iki.fi>
Subject: Re: SerializeParamList vs machines with strict alignment
Date: Mon, 01 Oct 2018 20:01:54 -0400
Message-ID: <4694.1538438514@sss.pgh.pa.us> (raw)
In-Reply-To: <CAEepm=1QkD_udoP3sxc_fci7x3PXQu3-Q-E-oempRuciSNp05Q@mail.gmail.com>
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Thomas Munro <thomas.munro@enterprisedb.com> writes:
> On Tue, Oct 2, 2018 at 9:49 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Apparently the only somewhat-modern architecture that is resolutely
>> unaligned-unfriendly is MIPS.
> It's been a few years now since I worked on that architecture, but
> Sparc is somewhat-modern and resolutely unaligned-unfriendly. It's
> just that you can optionally install a trap handler that will do super
> slow non-atomic misaligned access in software instead of blowing up
> with SIGBUS. With the Sun toolchain you did that explicitly by
> building with -misalign (though it's possible that more recent
> compilers might be doing that without being asked?).
Interesting ... I suppose we'd have seen that on the Sparc critters,
except that they weren't running with force_parallel_mode = regress
like chipmunk is.
Now I'm tempted to propose that Amit commit *just* the test case
and not the fix, and wait a day to see which buildfarm critters fail.
regards, tom lane
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, thomas.munro@enterprisedb.com, amit.kapila16@gmail.com, pgsql-hackers@lists.postgresql.org, hlinnaka@iki.fi
Subject: Re: SerializeParamList vs machines with strict alignment
In-Reply-To: <4694.1538438514@sss.pgh.pa.us>
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