Comment 2 for bug 1997932

Reviewed: https://review.opendev.org/c/starlingx/integ/+/865627
Committed: https://opendev.org/starlingx/integ/commit/aafd8aba4893579c9b3d361afdd0a7b50b7f4406
Submitter: "Zuul (22348)"
Branch: master

commit aafd8aba4893579c9b3d361afdd0a7b50b7f4406
Author: Jiping Ma <email address hidden>
Date: Thu Nov 24 21:42:20 2022 -0500

    CentOS: kdump: remove unnecessary bootargs

    The 5.10.74 preempt-rt kernel reports the following warning when
    dumping vmcore files due to the use of kernel command line arguments
    such as nohz_full=, isolcpus=, rcu_nocbs= with the kexec/kdump kernel.

    [ 1.568059] WARNING: CPU: 0 PID: 0 at kernel/time/tick-sched.c:139
    tick_sched_do_timer+0x5e/0x70
    [ 1.568064] Modules linked in:
    [ 1.568066] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G I
    5.10.74-200.1648.tis.rt.el7.x86_64 #1
    [ 1.568068] Hardware name: Dell Inc. PowerEdge R740/0WRPXK, BIOS
    2.10.2 02/24/2021
    [ 1.568068] RIP: 0010:tick_sched_do_timer+0x5e/0x70
    [ 1.568071] Code: 01 00 75 26 89 15 26 74 6f 01 48 8b 05 1b 87 d5 01

    Commit 1655ee30e6("sched/isolation: really align nohz_full with
    rcu_nocbs") is included in the 5.10.112 kernel, that had fixed the
    warning. So the warning will not be reproduced with 5.10.112 and the
    later versions of kernel.

    We can remove the irqaffinity, isolcpus, nohz_full, rcu_nocbs, and
    kthread_cpus arguments from the kdump kernel's command line arguments,
    which will also fix the issue.

    Testing:
    - An ISO image can be built successfully.
    - There are no warnings after the fix with 5.10.74 kernel.

    Closes-Bug: 1997932

    Signed-off-by: M. Vefa Bicakci <email address hidden>
    Signed-off-by: Jiping Ma <email address hidden>
    Reported-by: M. Vefa Bicakci <email address hidden>
    Change-Id: I7d1dbd864fdfe2533197084d7274ef6ab70892db