From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andres Freund <andres@anarazel.de>
Cc: Simon Riggs <simon@2ndquadrant.com>
Cc: Tomas Vondra <tv@fuzzy.cz>
Cc: pgsql-committers <pgsql-committers@postgresql.org>
Cc: Andrew Dunstan <andrew@dunslane.net>
Subject: Re: pgsql: Generational memory allocator
Date: Thu, 23 Nov 2017 15:06:42 -0500
Message-ID: <21043.1511467602@sss.pgh.pa.us> (raw)
In-Reply-To: <20171123193936.fncfnar5wkpx56mw@alap3.anarazel.de>
References: <E1eHa4J-0006hI-Q8@gemulon.postgresql.org>
<20171123001649.y2nf7422iay6cw3v@alap3.anarazel.de>
<CANP8+jKoT=Pg5W_3FcKiDf+FMrJhFYacxt_g5E0=tkmb5s8M6g@mail.gmail.com>
<20171123193936.fncfnar5wkpx56mw@alap3.anarazel.de>
Andres Freund <andres@anarazel.de> writes:
> On 2017-11-23 20:57:10 +1100, Simon Riggs wrote:
>> On 23 November 2017 at 11:16, Andres Freund <andres@anarazel.de> wrote:
>>> Looks like it's not quite valgrind clean:
>>> https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=skink&dt=2017-11-22%2022%3A30%3A01>> It doesn't report anything useful that would allow me to fix this.
> Uh. It reports a failure, and you can go from there. The error output
> actually is in postmaster.log but for some reason the buildfarm code
> didn't display that in this case.
I think it's a legitimate complaint that postmaster.log wasn't captured
in this failure, but that's a buildfarm script oversight and hardly
Andres' fault.
In any case, valgrind failures are generally easy enough to reproduce
locally.
Meanwhile, over on
https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=snapper&dt=2017-11-23%2013%3A56%3A17
we have
ccache gcc-4.7 -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -g -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -I../../../../src/include -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE -I/usr/include/libxml2 -I/usr/include/mit-krb5 -c -o generation.o generation.c
generation.c: In function ‘GenerationContextCreate’:
generation.c:206:7: error: static assertion failed: "padding calculation in GenerationChunk is wrong"
make[4]: *** [generation.o] Error 1
Looks to me like GenerationChunk imagines that 3*sizeof(pointer)
must be a maxaligned quantity, which is wrong on platforms where
MAXALIGN is bigger than sizeof(pointer).
regards, tom lane
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To: pgsql-committers@postgresql.org
Cc: tgl@sss.pgh.pa.us, andres@anarazel.de, simon@2ndquadrant.com, tv@fuzzy.cz, andrew@dunslane.net
Subject: Re: pgsql: Generational memory allocator
In-Reply-To: <21043.1511467602@sss.pgh.pa.us>
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