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Mon, 18 Jan 2021 17:48:33 -0500 (EST) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.120.23.2.4\)) From: Carl Dong In-Reply-To: <87a6u529nl.fsf@gnu.org> Date: Mon, 18 Jan 2021 17:48:32 -0500 Content-Transfer-Encoding: quoted-printable Message-Id: <5846BC15-6BDE-4ACB-9194-AFC76ABBBCE3@carldong.me> References: <1C1332EB-3389-416F-A8A7-0CF6A469AE29@carldong.me> <3FFC3D46-B961-479D-BCA9-273C150BF9CC@carldong.me> <87a6ukkg1r.fsf@gnu.org> <58F8D6E0-B15D-47D2-A468-8620B9DBD90D@carldong.me> <1CB66010-F81E-447B-9715-B1A79415EAA6@carldong.me> <87a6u529nl.fsf@gnu.org> X-Mailer: Apple Mail (2.3608.120.23.2.4) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-guix@gnu.org List-Id: Bug reports for GNU Guix List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guix-bounces+larch=yhetil.org@gnu.org Sender: "bug-Guix" X-Migadu-Flow: FLOW_IN X-Migadu-Spam-Score: -0.85 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=carldong.me header.s=fm3 header.b=OO2+Fwu3; dkim=fail ("headers rsa verify failed") header.d=messagingengine.com header.s=fm1 header.b=LfTqYv2d; dmarc=none; spf=pass (aspmx1.migadu.com: domain of bug-guix-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=bug-guix-bounces@gnu.org X-Migadu-Queue-Id: 9DCCC940111 X-Spam-Score: -0.85 X-Migadu-Scanner: scn1.migadu.com X-TUID: BFMz9BXUu/gn Hi all, I was able to bisect this down to a few kernel configuration options, so = perhaps those with more kernel experience can help me track down = what=E2=80=99s going on. The two Kconfig options which seem to influence the behavior are: 1. CONFIG_EXPERT 2. CONFIG_UID16 CONFIG_EXPERT=3Dy, CONFIG_UID16=3Dy -> status code =3D 0 CONFIG_EXPERT=3Dy, CONFIG_UID16=3Dn -> status code =3D 1 CONFIG_EXPERT=3Dy, CONFIG_UID16 not set -> status code =3D 1 CONFIG_EXPERT=3Dn, any CONFIG_UID16 -> status code =3D 0 This is somewhat perplexing to me, as looking at the entry for = CONFIG_UID16, I see that the default value is =E2=80=9Cy=E2=80=9D, so I = would expect there not to be a difference between CONFIG_UID16=3Dy and = CONFIG_UID16 not being set when CONFIG_EXPERT=3Dy. This configuration option investigation originated from when I bisected = across Arch Linux=E2=80=99s kernel configuration and found that this = recent commit fixed our problem: = https://github.com/archlinux/svntogit-packages/commit/1b26b3445354ccdb92b4= 361e772fb9f246143d0b#diff-3e341d2d9c67be01819b25b25d5e53ea3cdf3a38d28846cd= a85a195eb9b7203a Note that this above config has CONFIG_HAVE_UID16=3Dy and = CONFIG_MULTIUSER=3Dy Let me know how best to approach this! Cheers, Carl Dong