kdump - sysrq-c: failed to save a vmcore: No space left on device

Snippet of test failure

# https://s3.us-east-1.amazonaws.com/arr-cki-prod-datawarehouse-public/datawarehouse-public/2022/05/29/550672887/redhat:550672887_ppc64le/tests/kdump_sysrq_c/12053053_ppc64le_2_taskout.log

[  15:56:43  ] :: [  LOG  ] :: Restarting Kdump service.
Uploading kdump.conf .done
Uploading kdump .done
kdump: Reserved 4096MB memory for crash kernel
kdump: kexec: unloaded kdump kernel
kdump: Stopping kdump: [OK]
kdump: No kdump initial ramdisk found.
kdump: Rebuilding /boot/initramfs-5.18.0kdump.img
kdump: Warning: There might not be enough space to save a vmcore.
kdump:          The size of /dev/sda5 should be greater than 263712768 kilo bytes.
sed: can't read /var/tmp/dracut.ado62G/initramfs/usr/lib/udev/rules.d/40-redhat.rules: No such file or directory
cp: error copying '/var/tmp/dracut.ado62G/initramfs.img' to '/boot/initramfs-5.18.0kdump.img': No space left on device
dracut: dracut: creation of /boot/initramfs-5.18.0kdump.img failed
kdump: mkdumprd: failed to make kdump initrd
kdump: Starting kdump: [FAILED]
kdump: Kdump is not operational
../include/runtest.sh: line 344: /var/log/kdump.log: No such file or directory
../include/runtest.sh: line 346: [: : integer expression expected
[  15:56:54  ] :: [ ERROR ] :: Restarting kdump failed.
[  15:56:54  ] :: [ ERROR ] :: Aborting the recipe set
** /kdump/crash-sysrq-c FAIL Score:1
Uploading resultoutputfile.log .done

Test logs on DataWarehouse

Test : https://datawarehouse.cki-project.org/kcidb/tests/3679976
- Beaker task : https://beaker.engineering.redhat.com/recipes/12053053#task145286160

DataWarehouse issue

DW issue : https://datawarehouse.cki-project.org/issue/1252
- Regex : https://datawarehouse.cki-project.org/issue/-/regex/1201
  - Text Match : cp: error copying '\S+initramfs\.img' to '\/boot\/\S+\.img': No space left on device
  - (Log) File Name Match : taskout.log
  - Test Name Match : kdump - sysrq-c
  - KPET Tree Name Match : (upstream|rawhide)

Additional details

N/A

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