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Bhupesh Sharma 3001788f4c Add aarch64 specific kdump.sysconfig and use 'nr_cpus' instead of 'maxcpus' 
'maxcpus' setting normally don't work on several kdump enabled systems
due to a known udev issue.

Currently the fedora kdump configuration is set as the following on the
aarch64 systems:

 # cat /etc/sysconfig/kdump
<..snip..>
  # This variable lets us append arguments to the current kdump
  # commandline after processed by KDUMP_COMMANDLINE_REMOVE
  # KDUMP_COMMANDLINE_APPEND="irqpoll maxcpus=1 reset_devices"
<..snip..>

Since the 'maxcpus' setting doesn't limit the number of SMP CPUs,
so the kdump kernel still boots with all CPUs available on the system.
For e.g on the qualcomm amberwing its 46 CPUs:

  # lscpu
Architecture:        aarch64
Byte Order:          Little Endian
CPU(s):              46
On-line CPU(s) list: 0-45
Thread(s) per core:  1
Core(s) per socket:  46
Socket(s):           1
NUMA node(s):        1
Vendor ID:           Qualcomm
Model:               1
Model name:          Falkor
Stepping:            0x0
CPU max MHz:         2600.0000
CPU min MHz:         600.0000
BogoMIPS:            40.00
L1d cache:           32K
L1i cache:           64K
L2 cache:            512K
L3 cache:            58880K
NUMA node0 CPU(s):   0-45
Flags:               fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid asimdrdm

This causes the memory consumption in the kdump kernel to swell up and
we can end up having OOM issues in the kdump kernel boot.

Whereas if we use 'nr_cpus=1' in the bootargs, the number of SMP CPUs in
the kdump kernel get limited to 1.

The 'swiotlb=noforce' setting in bootargs provide us extra guarding, to
ensure the crash kernel size requirements do not swell on systems
which support swiotlb.

With the above settings, crashkernel boots properly (without OOM) on all
the aarch64 boards I could test on - qualcomm amberwings, hp-moonshots
and hpe-apache (thunderx2) for crash dump saving on local disk.

Signed-off-by: Bhupesh Sharma <bhsharma@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
2019-05-29 17:04:20 +08:00
.gitignore .gitignore: Update to make it more generic 2016-05-16 10:15:01 +08:00
98-kexec.rules Make udev reload rules quiet during bootup 2018-12-06 17:44:03 +08:00
98-kexec.rules.ppc64 kexec.rules: create dedicated udev rules for ppc64 2019-05-06 16:22:28 +08:00
dracut-early-kdump-module-setup.sh earlykdump: warn when installed kernel version differs from dracut target 2019-01-10 18:16:58 +08:00
dracut-early-kdump.sh earlykdump: generate symlink with stable name to kernel image and iniramfs 2019-01-10 18:11:49 +08:00
dracut-kdump-capture.service Introduce kdump capture service 2014-08-05 13:13:32 +08:00
dracut-kdump-emergency.service kdump-emergency: fix "Transaction is destructive" emergency failure 2017-03-31 11:54:30 +08:00
dracut-kdump-emergency.target kdump-emergency: fix "Transaction is destructive" emergency failure 2017-03-31 11:54:30 +08:00
dracut-kdump-error-handler.service Add failure_action as alias of default and make default obsolete 2019-01-22 17:57:53 +08:00
dracut-kdump-error-handler.sh Add failure_action as alias of default and make default obsolete 2019-01-22 17:57:53 +08:00
dracut-kdump.sh Get rid of duplicated strip_comments when reading config 2019-05-20 16:56:28 +08:00
dracut-module-setup.sh Get rid of duplicated strip_comments when reading config 2019-05-20 16:56:28 +08:00
dracut-monitor_dd_progress monitor-dd-progress fix 2013-06-25 16:45:59 +08:00
early-kdump-howto.txt earlykdump: provide a prompt message after the rebuilding of kdump initramfs. 2019-05-20 16:56:19 +08:00
fadump-howto.txt Add final_action option to kdump.conf 2019-01-22 17:58:24 +08:00
kdump-dep-generator.sh kdump-dep-generator: Add kdump service dependencies on the fly 2014-04-17 11:27:31 +08:00
kdump-in-cluster-environment.txt Add fence_kdump support for generic clusters 2014-04-03 14:43:06 +08:00
kdump-lib-initramfs.sh Get rid of duplicated strip_comments when reading config 2019-05-20 16:56:28 +08:00
kdump-lib.sh Get rid of duplicated strip_comments when reading config 2019-05-20 16:56:28 +08:00
kdump-udev-throttler Make udev reload rules quiet during bootup 2018-12-06 17:44:03 +08:00
kdump.conf Add final_action option to kdump.conf 2019-01-22 17:58:24 +08:00
kdump.conf.5 Add final_action option to kdump.conf 2019-01-22 17:58:24 +08:00
kdump.service kdumpctl: Add reload support 2018-11-01 22:31:20 +08:00
kdump.sysconfig Remove kernel param "quiet" from kdump kernel cmdline 2015-12-11 15:18:31 +08:00
kdump.sysconfig.aarch64 Add aarch64 specific kdump.sysconfig and use 'nr_cpus' instead of 'maxcpus' 2019-05-29 17:04:20 +08:00
kdump.sysconfig.i386 Always drop nofail or nobootwait options 2018-08-14 10:34:45 +08:00
kdump.sysconfig.ppc64 Always drop nofail or nobootwait options 2018-08-14 10:34:45 +08:00
kdump.sysconfig.ppc64le Always drop nofail or nobootwait options 2018-08-14 10:34:45 +08:00
kdump.sysconfig.s390x Always drop nofail or nobootwait options 2018-08-14 10:34:45 +08:00
kdump.sysconfig.x86_64 Always drop nofail or nobootwait options 2018-08-14 10:34:45 +08:00
kdumpctl kdumpctl: check for ssh path availability when rebuild 2019-05-27 16:13:29 +08:00
kdumpctl.8 Update man page for new kdumpctl command: reload / rebuild 2019-04-05 02:02:58 +08:00
kexec-kdump-howto.txt kexec-kdump-howto.txt: Add document about encrypted targets 2019-05-20 13:41:44 +08:00
kexec-tools-2.0.18-makedumpfiles-honor-the-CFLAGS-from-environment.patch Enable building with hardening flags 2019-02-22 17:09:07 +08:00
kexec-tools.spec Add aarch64 specific kdump.sysconfig and use 'nr_cpus' instead of 'maxcpus' 2019-05-29 17:04:20 +08:00
live-image-kdump-howto.txt Revert "kdumpctl: filter 'root' kernel parameter when running in live images" 2017-04-11 16:03:12 +08:00
mkdumprd Get rid of duplicated strip_comments when reading config 2019-05-20 16:56:28 +08:00
mkdumprd.8 Remove comma which is redundant 2013-02-16 15:19:41 +08:00
README README: Add a README file 2014-04-02 10:45:36 +08:00
sources Release 2.0.19-1 2019-03-22 17:06:27 +08:00
zanata-notes.txt Add a notes for zanata process 2012-12-05 01:23:09 -05:00

README 

Adding a patch to kexec-tools
=============================
There is a mailing list kexec@lists.fedoraproject.org where all the dicussion
related to fedora kexec-tools happen. All the patches are posted there for
inclusion and committed to kexec-tools after review.

So if you want your patches to be included in fedora kexec-tools package,
post these to kexec@lists.fedoraproject.org.

One can subscribe to list and browse through archives here.

https://admin.fedoraproject.org/mailman/listinfo/kexec