From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BC928C4363A for ; Tue, 27 Oct 2020 10:52:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 708C920708 for ; Tue, 27 Oct 2020 10:52:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1421374AbgJ0Kwe (ORCPT ); Tue, 27 Oct 2020 06:52:34 -0400 Received: from mail.monom.org ([188.138.9.77]:54546 "EHLO mail.monom.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1421168AbgJ0Kwb (ORCPT ); Tue, 27 Oct 2020 06:52:31 -0400 Received: from mail.monom.org (localhost [127.0.0.1]) by filter.mynetwork.local (Postfix) with ESMTP id A69EE50046C; Tue, 27 Oct 2020 11:52:26 +0100 (CET) Received: from localhost (unknown [94.31.100.251]) by mail.monom.org (Postfix) with ESMTPSA id 6250E500299; Tue, 27 Oct 2020 11:52:26 +0100 (CET) Date: Tue, 27 Oct 2020 11:52:26 +0100 From: Daniel Wagner To: Sebastian Andrzej Siewior Cc: Thomas Gleixner , LKML , linux-rt-users , Steven Rostedt , Clark Williams Subject: Re: [ANNOUNCE] v5.9.1-rt19 Message-ID: <20201027105226.pzqqgeni572juhje@beryllium.lan> References: <20201024091838.gzhn2dlx2j7xnixg@linutronix.de> <20201027093616.5vn6xinmthxulhvx@beryllium.lan> <20201027100049.xtkmjqdwkn7zec2f@linutronix.de> <20201027102547.y6wop7j2ovzg2tyx@beryllium.lan> <20201027102851.gizepjlu4opensqb@linutronix.de> <20201027103411.h5ushvwsrovxls5u@beryllium.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201027103411.h5ushvwsrovxls5u@beryllium.lan> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 27, 2020 at 11:34:11AM +0100, Daniel Wagner wrote: > It says so, let me double check if those task really run with SCHED_FIFO. I just got an RCU stall without any background load. Anyway, just for completeness here is the ps output: root@c2d:~# ps -eLo pid,tid,class,rtprio,ni,pri,psr,pcpu,stat,wchan:14,comm PID TID CLS RTPRIO NI PRI PSR %CPU STAT WCHAN COMMAND 1 1 TS - 0 19 0 0.0 Ss - systemd 2 2 TS - 0 19 0 0.0 S - kthreadd 3 3 TS - -20 39 0 0.0 I< - rcu_gp 4 4 TS - -20 39 0 0.0 I< - rcu_par_gp 6 6 TS - -20 39 0 0.0 I< - kworker/0:0H-events_highpri 8 8 TS - -20 39 0 0.0 I< - mm_percpu_wq 9 9 TS - 0 19 0 0.0 S - ksoftirqd/0 10 10 FF 1 - 41 0 0.0 S - rcuc/0 11 11 FF 1 - 41 0 0.0 I - rcu_preempt 12 12 FF 1 - 41 0 0.0 S - rcub/0 13 13 FF 99 - 139 0 0.0 S - migration/0 14 14 TS - 0 19 0 0.0 S - cpuhp/0 15 15 TS - 0 19 1 0.0 S - cpuhp/1 16 16 FF 99 - 139 1 0.0 S - migration/1 17 17 FF 1 - 41 1 0.0 R - rcuc/1 18 18 TS - 0 19 1 0.0 R - ksoftirqd/1 19 19 TS - 0 19 1 0.0 I - kworker/1:0-events_freezable_power_ 20 20 TS - -20 39 1 0.0 I< - kworker/1:0H-kblockd 21 21 TS - 0 19 1 0.0 S - kdevtmpfs 22 22 TS - -20 39 0 0.0 I< - netns 23 23 TS - 0 19 1 0.0 S - rcu_tasks_kthre 24 24 TS - 0 19 1 0.0 S - rcu_tasks_rude_ 25 25 TS - 0 19 0 0.0 S - kauditd 26 26 TS - 0 19 1 0.0 I - kworker/1:1-events_freezable_power_ 27 27 TS - 0 19 0 0.0 I - kworker/0:1-ata_sff 28 28 TS - 0 19 1 0.0 S - oom_reaper 29 29 TS - -20 39 1 0.0 I< - writeback 30 30 TS - 0 19 0 0.0 S - kcompactd0 50 50 TS - -20 39 1 0.0 I< - kblockd 51 51 FF 50 - 90 1 0.0 S - irq/9-acpi 52 52 TS - -20 39 1 0.0 I< - ata_sff 53 53 TS - -20 39 0 0.0 I< - md 54 54 TS - -20 39 0 0.0 I< - rpciod 55 55 TS - -20 39 0 0.0 I< - kworker/u9:0-xprtiod 56 56 TS - -20 39 0 0.0 I< - xprtiod 57 57 TS - -20 39 1 0.0 I< - cfg80211 58 58 TS - 0 19 0 0.0 S - kswapd0 59 59 TS - -20 39 1 0.0 I< - nfsiod 61 61 TS - -20 39 1 0.0 I< - acpi_thermal_pm 63 63 FF 50 - 90 0 0.0 S - card0-crtc0 64 64 FF 50 - 90 0 0.0 S - card0-crtc1 65 65 FF 50 - 90 0 0.0 S - irq/16-i915 66 66 TS - -20 39 0 0.0 I< - kworker/0:1H-kblockd 67 67 FF 50 - 90 1 0.0 S - irq/14-ata_piix 68 68 FF 50 - 90 0 0.0 S - irq/15-ata_piix 69 69 TS - 0 19 1 0.0 S - scsi_eh_0 70 70 TS - -20 39 1 0.0 I< - scsi_tmf_0 71 71 TS - 0 19 1 0.0 S - scsi_eh_1 72 72 TS - -20 39 0 0.0 I< - scsi_tmf_1 78 78 FF 50 - 90 1 0.0 S - irq/23-ehci_hcd 79 79 FF 50 - 90 1 0.0 S - irq/23-uhci_hcd 80 80 FF 50 - 90 0 0.0 S - irq/19-uhci_hcd 81 81 FF 50 - 90 1 0.0 S - irq/18-uhci_hcd 82 82 FF 50 - 90 0 0.0 S - irq/16-uhci_hcd 83 83 FF 50 - 90 0 0.0 S - irq/1-i8042 84 84 FF 50 - 90 1 0.0 S - irq/8-rtc0 85 85 FF 50 - 90 0 0.0 S - irq/19-i801_smb 86 86 TS - -20 39 1 0.0 I< - ipv6_addrconf 88 88 TS - 0 19 0 0.2 S - pr/ttyS0 89 89 TS - 0 19 0 0.0 S - pr/netcon0 93 93 TS - -20 39 1 0.0 I< - kworker/1:1H-kblockd 94 94 FF 50 - 90 0 0.0 S - irq/26-eth0 95 95 TS - 0 19 1 0.0 S - scsi_eh_2 96 96 TS - -20 39 1 0.0 I< - scsi_tmf_2 97 97 TS - 0 19 0 0.0 S - usb-storage 105 105 TS - -20 39 1 0.0 I< - kworker/u9:1-xprtiod 106 106 TS - 0 19 0 0.0 S - NFSv4 callback 114 114 TS - 0 19 0 0.0 I - kworker/u8:8-events_unbound 158 158 TS - 0 19 0 0.0 Ss - systemd-journal 167 167 TS - 0 19 0 0.0 Ss - systemd-udevd 175 175 TS - 0 19 0 0.0 Ss - systemd-network 195 195 TS - 0 19 0 0.0 Ssl - systemd-timesyn 195 200 TS - 0 19 0 0.0 Ssl - sd-resolve 224 224 TS - 0 19 0 0.0 Ss - sshd 226 226 TS - 0 19 1 0.0 Ss+ - agetty 227 227 TS - 0 19 0 0.0 Ss+ - agetty 228 228 TS - 0 19 1 0.0 Ss+ - agetty 232 232 TS - 0 19 0 0.0 Ss+ - agetty 233 233 TS - 0 19 1 0.0 Ss+ - agetty 234 234 TS - 0 19 0 0.0 Ss+ - agetty 236 236 TS - 0 19 1 0.0 Ss+ - agetty 241 241 FF 50 - 90 1 0.0 S - irq/4-ttyS0 263 263 TS - 0 19 0 0.0 I - kworker/u8:47-rpciod 266 266 TS - 0 19 1 0.0 R - kworker/1:2+events_freezable_power_ 267 267 TS - 0 19 0 0.0 I - kworker/0:0-events_power_efficient 269 269 TS - 0 19 0 0.0 Ss - sshd 275 275 TS - 0 19 0 0.0 Ss - bash 282 282 FF 4 - 44 0 0.0 Sl+ - pi_stress 282 283 FF 1 - 41 1 42.0 Rl+ - pi_stress 282 284 FF 2 - 42 1 22.1 Sl+ - pi_stress 282 285 FF 3 - 43 1 35.7 Rl+ - pi_stress 297 297 TS - 0 19 1 0.0 R - kworker/1:3 303 303 TS - 0 19 0 0.0 I - kworker/0:2-ata_sff 308 308 TS - 0 19 1 0.0 R - kworker/1:4 312 312 TS - 0 19 0 0.0 I - kworker/0:3-ata_sff 316 316 TS - 0 19 0 0.0 I - kworker/u8:0-rpciod 317 317 TS - 0 19 0 0.0 I - kworker/u8:1-rpciod 320 320 TS - 0 19 0 1.0 Ss - sshd 326 326 TS - 0 19 0 0.0 Ss - bash 329 329 TS - 0 19 0 0.0 R+ - ps