GNU bug report logs - #47543
“Repeated allocation of very large block” during ‘guix pull’

Message received at submit <at> debbugs.gnu.org:

Received: (at submit) by debbugs.gnu.org; 1 Apr 2021 14:00:14 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Thu Apr 01 10:00:14 2021
Received: from localhost ([127.0.0.1]:58118 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.84_2)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1lRxrq-0005N6-5W
	for submit <at> debbugs.gnu.org; Thu, 01 Apr 2021 10:00:14 -0400
Received: from lists.gnu.org ([209.51.188.17]:60764)
 by debbugs.gnu.org with esmtp (Exim 4.84_2)
 (envelope-from <ludovic.courtes@HIDDEN>) id 1lRxro-0005LB-Cf
 for submit <at> debbugs.gnu.org; Thu, 01 Apr 2021 10:00:12 -0400
Received: from eggs.gnu.org ([2001:470:142:3::10]:50596)
 by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.90_1) (envelope-from <ludovic.courtes@HIDDEN>)
 id 1lRxro-0003C5-1v
 for bug-guix@HIDDEN; Thu, 01 Apr 2021 10:00:12 -0400
Received: from mail2-relais-roc.national.inria.fr ([192.134.164.83]:51052)
 by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.90_1) (envelope-from <ludovic.courtes@HIDDEN>)
 id 1lRxrl-0006uM-P0
 for bug-guix@HIDDEN; Thu, 01 Apr 2021 10:00:11 -0400
IronPort-HdrOrdr: =?us-ascii?q?A9a23=3AIOduCKrjp/UGHh3n+7D83ZkaV5tvL9V00zAX?=
 =?us-ascii?q?/kB9WHVpW+afkN2jm+le8BfyhioYVn1Io6H9BICrR3TA+ZlppbQAJLvKZniahE?=
 =?us-ascii?q?KEDqFHqbHjzTrpBjHk+odmuptIXqBiBLTLfCFHpOng5g3QKadF/PCm9+SSif7a?=
 =?us-ascii?q?3zNRS2hRGttdxiNYLireLUFsXglBAvMCZeGhz+5KvSCpd3hSTunTPAhiY8H5q9?=
 =?us-ascii?q?fGlI3rbHc9bnZMhWXu7Q+A07L0HwOV2R0TSVp0sNUf2FLYmA/07LjLiYDZ9jbg?=
 =?us-ascii?q?0QbonvFrsef6xsAGLMKBjdV9EESVti+YIKtmQKOLpz04raWK5EwxmNfB5zcsVv?=
 =?us-ascii?q?4DjE/5TyWIhV/G3gnt1ytrw3Lu0jaj6kfLkIjHRCknEY56j4pfdRfVgnBPgO1B?=
X-IronPort-AV: E=Sophos;i="5.81,296,1610406000"; d="scan'208";a="501146466"
Received: from 91-160-117-201.subs.proxad.net (HELO ribbon) ([91.160.117.201])
 by mail2-relais-roc.national.inria.fr with
 ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 Apr 2021 16:00:06 +0200
From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludovic.courtes@HIDDEN>
To: <bug-guix@HIDDEN>
Subject: =?utf-8?Q?=E2=80=9CRepeated?= allocation of very large
 =?utf-8?Q?block=E2=80=9D?= during =?utf-8?B?4oCYZ3VpeCBwdWxs4oCZ?=
X-URL: http://www.fdn.fr/~lcourtes/
X-Revolutionary-Date: 12 Germinal an 229 de la =?utf-8?Q?R=C3=A9volution?=
X-PGP-Key-ID: 0x090B11993D9AEBB5
X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc
X-PGP-Fingerprint: 3CE4 6455 8A84 FDC6 9DB4  0CFB 090B 1199 3D9A EBB5
X-OS: x86_64-pc-linux-gnu
Date: Thu, 01 Apr 2021 16:00:06 +0200
Message-ID: <87v9966r6h.fsf@HIDDEN>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux)
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Received-SPF: pass client-ip=192.134.164.83;
 envelope-from=ludovic.courtes@HIDDEN;
 helo=mail2-relais-roc.national.inria.fr
X-Spam_score_int: -41
X-Spam_score: -4.2
X-Spam_bar: ----
X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3,
 RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001,
 SPF_PASS=-0.001 autolearn=ham autolearn_force=no
X-Spam_action: no action
X-Spam-Score: -1.3 (-)
X-Debbugs-Envelope-To: submit
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -2.3 (--)

While running =E2=80=98guix pull=E2=80=99, sometime between the actual =E2=
=80=98git pull=E2=80=99 (via
Guile-Git) and channel authentication, I saw the dreaded libgc warning:

  Repeated allocation of very large block

I forgot to capture the command output though, and it does not seem to
be reproducible.  (This is with a recent Guix,
ca. 9098745b181b3022587a35afd255f7ff1d41ac86.)

Running the command below from a Guix checkout, which authenticates 15+K
commits, isn=E2=80=99t enough to trigger it:

  guix git authenticate --cache-key=3Dwhatever \
    "9edb3f66fd807b096b48283debdcddccfea34bad" \
    "BBB0 2DDF 2CEA F6A8 0D1D E643 A2A0 6DF2 A33A 54FA"

So it might rather be =E2=80=98update-cached-checkout=E2=80=99 that trigger=
s it.

If you experience it, please share the command line and command output!

Ludo=E2=80=99.