GNU logs - #67535, boring messages

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Subject: bug#67535: ci.guix.gnu.org 'Cannot allocate memory' while building for i686-linux
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Date: Wed, 29 Nov 2023 15:55:15 -0500
From: Leo Famulari <leo@HIDDEN>
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I see that ci.guix.gnu.org's builders seem to run out of memory while
building kernel headers for i686-linux:

------
xz: (stdin): Cannot allocate memory
/gnu/store/ns71xxkb3fzr37934bim9l8xiv68kc7w-tar-1.34/bin/tar: /gnu/store/536ifp75wv8i1kb1k0szv7zd57ygpg0n-linux-libre-6.5.13-guix.tar.xz: Wrote only 2048 of 10240 bytes
/gnu/store/ns71xxkb3fzr37934bim9l8xiv68kc7w-tar-1.34/bin/tar: Child returned status 1
/gnu/store/ns71xxkb3fzr37934bim9l8xiv68kc7w-tar-1.34/bin/tar: Error is not recoverable: exiting now
------

https://ci.guix.gnu.org/build/2736161/details

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Subject: bug#67535: Acknowledgement (ci.guix.gnu.org 'Cannot allocate
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Subject: bug#67535: ci.guix.gnu.org 'Cannot allocate memory' while building for i686-linux
Resent-From: Efraim Flashner <efraim@HIDDEN>
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On Wed, Nov 29, 2023 at 03:55:15PM -0500, Leo Famulari wrote:
> I see that ci.guix.gnu.org's builders seem to run out of memory while
> building kernel headers for i686-linux:
>=20
> ------
> xz: (stdin): Cannot allocate memory
> /gnu/store/ns71xxkb3fzr37934bim9l8xiv68kc7w-tar-1.34/bin/tar: /gnu/store/=
536ifp75wv8i1kb1k0szv7zd57ygpg0n-linux-libre-6.5.13-guix.tar.xz: Wrote only=
 2048 of 10240 bytes
> /gnu/store/ns71xxkb3fzr37934bim9l8xiv68kc7w-tar-1.34/bin/tar: Child retur=
ned status 1
> /gnu/store/ns71xxkb3fzr37934bim9l8xiv68kc7w-tar-1.34/bin/tar: Error is no=
t recoverable: exiting now
> ------
>=20
> https://ci.guix.gnu.org/build/2736161/details

This looks like more of the too-many-cores while decompressing tarballs
issues we've had in the past on i686-linux.  Can we change that phase to
use a maximum of 4 cores or would that cause everything to rebuild?

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