From mboxrd@z Thu Jan 1 00:00:00 1970 From: myglc2 Subject: bug#26706: mingetty consumes 40% CPU printing the login prompt over and over Date: Fri, 28 Apr 2017 21:11:06 -0400 Message-ID: <86shksj9w5.fsf@gmail.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="=-=-=" Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:45453) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d4Gvf-0000M9-A2 for bug-guix@gnu.org; Fri, 28 Apr 2017 21:12:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d4Gva-0007ie-BP for bug-guix@gnu.org; Fri, 28 Apr 2017 21:12:07 -0400 Received: from debbugs.gnu.org ([208.118.235.43]:47070) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1d4Gva-0007iY-7k for bug-guix@gnu.org; Fri, 28 Apr 2017 21:12:02 -0400 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1d4Gva-0004FB-3s for bug-guix@gnu.org; Fri, 28 Apr 2017 21:12:02 -0400 Sender: "Debbugs-submit" Resent-Message-ID: Received: from eggs.gnu.org ([2001:4830:134:3::10]:45340) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d4Guq-0000C2-14 for bug-guix@gnu.org; Fri, 28 Apr 2017 21:11:16 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d4Gul-0007Z0-2p for bug-guix@gnu.org; Fri, 28 Apr 2017 21:11:16 -0400 Received: from mail-qt0-x22a.google.com ([2607:f8b0:400d:c0d::22a]:34917) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1d4Guk-0007Yo-Sb for bug-guix@gnu.org; Fri, 28 Apr 2017 21:11:11 -0400 Received: by mail-qt0-x22a.google.com with SMTP id y33so62497202qta.2 for ; Fri, 28 Apr 2017 18:11:10 -0700 (PDT) Received: from g1 (c-73-167-118-254.hsd1.ma.comcast.net. [73.167.118.254]) by smtp.gmail.com with ESMTPSA id z137sm4223502qkb.3.2017.04.28.18.11.09 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 28 Apr 2017 18:11:09 -0700 (PDT) List-Id: Bug reports for GNU Guix List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guix-bounces+gcggb-bug-guix=m.gmane.org@gnu.org Sender: "bug-Guix" To: 26706@debbugs.gnu.org --=-=-= Content-Type: text/plain I noticed that my headless server running GuixSD was busy when I am not doing anything. When I looked at top I saw mingetty consuming 40% CPU ... $ top -o %CPU -n 1 | head -n 25 top - 20:44:13 up 5 days, 12:58, 3 users, load average: 0.33, 0.33, 0.35 Tasks: 192 total, 1 running, 191 sleeping, 0 stopped, 0 zombie %Cpu0 : 0.0/0.1 0[ ] %Cpu1 : 0.1/2.9 3[|| ] %Cpu2 : 0.2/4.0 4[||| ] %Cpu3 : 0.3/4.9 5[||| ] %Cpu4 : 0.2/0.1 0[ ] %Cpu5 : 0.2/4.6 5[||| ] %Cpu6 : 0.2/4.3 5[||| ] %Cpu7 : 0.3/4.1 4[||| ] GiB Mem : 6.5/15.610 [ ] GiB Swap: 0.0/9.649 [ ] PID USER PR NI VIRT RES %CPU %MEM TIME+ S COMMAND 384 root 20 0 6.2m 0.3m 40.0 0.0 2386:36 S mingetty 7 root 20 0 0.0m 0.0m 6.7 0.0 2:20.86 S rcu_sched 4154 g1 20 0 300.3m 135.1m 6.7 0.8 3:37.67 S emacs 7431 root 20 0 0.0m 0.0m 6.7 0.0 0:26.07 S kworker/u16:2 7539 root 20 0 0.0m 0.0m 6.7 0.0 0:06.54 S kworker/u16:0 1 root 20 0 130.1m 27.9m 0.0 0.2 0:03.22 S shepherd If I plug in a console display, I see the login prompt is being rapidly printed over and over. If I hit the console return key the printing stops and mingetty stops using CPU. I am running a relatively recent GuixSD built from git checkout ... g1@g1 ~$ guix --version guix (GNU Guix) 0.12.0 g1@g1 ~$ stat ~/.config/guix/latest | grep File: File: /home/g1/.config/guix/latest -> /home/g1/src/guix/ g1@g1 ~$ git -C ~/.config/guix/latest describe v0.12.0-3191-g25a49294c g1@g1 ~$ git -C ~/.config/guix/latest log -n 1 --oneline 25a49294c cache: Work around 'time-monotonic' bug in Guile 2.2.2. Here is the system config: --=-=-= Content-Type: application/octet-stream Content-Disposition: attachment; filename=sys.scm Content-Transfer-Encoding: base64 Ozs7IEd1aXhTRCBoZWFkbGVzcyBzZXJ2ZXIKKHVzZS1tb2R1bGVzIChnbnUpKQoodXNlLXNlcnZp Y2UtbW9kdWxlcyBuZXR3b3JraW5nIHNzaCkKKHVzZS1wYWNrYWdlLW1vZHVsZXMKIGJhc2UgZGlz ayBhZG1pbiBsaW51eCBxZW11IHNjcmVlbgogc3NoIGNlcnRzIHhvcmcgY3VwcwogZnJlZWlwbWkg cnN5bmMgd2dldCB2ZXJzaW9uLWNvbnRyb2wpCihvcGVyYXRpbmctc3lzdGVtCiAgKGhvc3QtbmFt ZSAiZzEiKQogICh0aW1lem9uZSAiQW1lcmljYS9OZXdfWW9yayIpCiAgKGxvY2FsZSAiZW5fVVMu dXRmOCIpCiAgKGtlcm5lbC1hcmd1bWVudHMgJygiY29uc29sZT10dHlTMSwxMTUyMDAiKSkKICA7 OyBSQUlEMSByb290IHVzaW5nIDEgTlZNZSBTU0QgKyAyIEhEcwogIChib290bG9hZGVyIChncnVi LWNvbmZpZ3VyYXRpb24gKGRldmljZSAiL2Rldi9udm1lMG4xIikpKQogIChpbml0cmQgKGxhbWJk YSAoZmlsZS1zeXN0ZW1zIC4gcmVzdCkgKGFwcGx5IGJhc2UtaW5pdHJkIGZpbGUtc3lzdGVtcwoJ CQkJCSAgICAgICAjOmV4dHJhLW1vZHVsZXMgJygicmFpZDEiKQoJCQkJCSAgICAgICByZXN0KSkp CiAgKG1hcHBlZC1kZXZpY2VzIChsaXN0IChtYXBwZWQtZGV2aWNlCgkJCSAoc291cmNlICcoIi9k ZXYvbnZtZTBuMXAxIiAiL2Rldi9zZGExIiAiL2Rldi9zZGIxIikpCgkJCSAodGFyZ2V0ICIvZGV2 L21kMyIpCgkJCSAodHlwZSByYWlkLWRldmljZS1tYXBwaW5nKSkpKQogIChmaWxlLXN5c3RlbXMg KGNvbnMgKGZpbGUtc3lzdGVtCgkJCSh0aXRsZSAnZGV2aWNlKQoJCQkoZGV2aWNlICIvZGV2L21k MyIpCgkJCShtb3VudC1wb2ludCAiLyIpCgkJCSh0eXBlICJleHQ0IikKCQkJKGRlcGVuZGVuY2ll cyBtYXBwZWQtZGV2aWNlcykpCgkJICAgICAgJWJhc2UtZmlsZS1zeXN0ZW1zKSkKICAoc3dhcC1k ZXZpY2VzICcoIi9kZXYvbnZtZTBuMXAyIiApKQogICh1c2VycyAoY29ucyogKHVzZXItYWNjb3Vu dCAobmFtZSAiZzEiKQoJCQkgICAgICAoZ3JvdXAgInVzZXJzIikKCQkJICAgICAgKHN1cHBsZW1l bnRhcnktZ3JvdXBzICcoIndoZWVsIiAia3ZtIikpCgkJCSAgICAgIChob21lLWRpcmVjdG9yeSAo c3RyaW5nLWFwcGVuZCAiL2hvbWUvIiBuYW1lKSkpCgkJKHVzZXItYWNjb3VudCAobmFtZSAiYWRt aW4iKQoJCQkgICAgICAoZ3JvdXAgInVzZXJzIikKCQkJICAgICAgKHN1cHBsZW1lbnRhcnktZ3Jv dXBzICcoIndoZWVsIiAia3ZtIikpCgkJCSAgICAgIChob21lLWRpcmVjdG9yeSAoc3RyaW5nLWFw cGVuZCAiL2hvbWUvIiBuYW1lKSkpCgkJJWJhc2UtdXNlci1hY2NvdW50cykpCiAgKHBhY2thZ2Vz IChjb25zKgoJICAgICBjdXBzCgkgICAgIGZyZWVpcG1pCgkgICAgIGdpdAoJICAgICBnbGliYy11 dGY4LWxvY2FsZXMKCSAgICAgZ251LW1ha2UKCSAgICAgbWRhZG0KCSAgICAgbnNzLWNlcnRzCgkg ICAgIG9wZW5zc2gKCSAgICAgcGFydGVkCgkgICAgIHFlbXUKCSAgICAgcnN5bmMKCSAgICAgc2Ny ZWVuCgkgICAgIHNtYXJ0bW9udG9vbHMKCSAgICAgd2dldAoJICAgICB4YXV0aAoJICAgICAlYmFz ZS1wYWNrYWdlcykpCiAgKHNlcnZpY2VzIChjb25zKiAoZGhjcC1jbGllbnQtc2VydmljZSkKCQkg ICAobnRwLXNlcnZpY2UpCgkJICAgKHNlcnZpY2Ugb3BlbnNzaC1zZXJ2aWNlLXR5cGUgKG9wZW5z c2gtY29uZmlndXJhdGlvbgoJCQkJCQkgICh4MTEtZm9yd2FyZGluZz8gI3QpKSkKCQkgICAoYWdl dHR5LXNlcnZpY2UgKGFnZXR0eS1jb25maWd1cmF0aW9uICh0dHkgInR0eVMxIikKCQkJCQkJCSAo YmF1ZC1yYXRlICIxMTUyMDAiKSkpCgkJICAgJWJhc2Utc2VydmljZXMpKSkK --=-=-=--