starlingx/integ
Code Issues Proposed changes

CentOS: kdump: remove unnecessary bootargs

Browse Source 
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 <Vefa.Bicakci@windriver.com>
Signed-off-by: Jiping Ma <jiping.ma2@windriver.com>
Reported-by: M. Vefa Bicakci <Vefa.Bicakci@windriver.com>
Change-Id: I7d1dbd864fdfe2533197084d7274ef6ab70892db
This commit is contained in:
Jiping Ma 2022-11-24 21:42:20 -05:00
parent 0591f8596e
commit aafd8aba48
1 changed files with 1 additions and 1 deletions
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2
tools/kexec-tools/files/kdump.sysconfig.x86_64
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@ -17,7 +17,7 @@ KDUMP_COMMANDLINE=""
# This variable lets us remove arguments from the current kdump commandline
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
# NOTE: some arguments such as crashkernel will always be removed
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug kaslr"
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug kaslr irqaffinity isolcpus nohz_full rcu_nocbs kthread_cpus"
# This variable lets us append arguments to the current kdump commandline
# after processed by KDUMP_COMMANDLINE_REMOVE