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fadump: avoid non-debug kernel use for fadump case

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Since commit c5bdd2d8f1 ("kdump-lib: use non-debug kernels first"),
non-debug kernel is preferred, over the debug variant, as dump capture
kernel to reduce memory consumption. This works alright for kdump as
the capture kernel is loaded using kexec.

In case of fadump, regular boot loader is used to load the capture
kernel. So, the default kernel needs to be used as capture kernel as
well. But with commit c5bdd2d8f1, initrd of a different kernel is
made dump capture capable, breaking fadump's ability to capture dump
properly. Fix this by sticking with the debug variant in case of
fadump.

Fixes: c5bdd2d8f1 ("kdump-lib: use non-debug kernels first")

Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Acked-by: Lichen Liu <lichliu@redhat.com>
Acked-by: Coiby Xu <coxu@redhat.com>
This commit is contained in:
Hari Bathini 2022-09-16 19:07:24 +05:30 committed by Coiby Xu
parent 4d52b7d548
commit d905d49c08
1 changed files with 7 additions and 1 deletions
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8
kdump-lib.sh
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@ -680,7 +680,13 @@ prepare_kdump_bootinfo()
if [[ -z $KDUMP_KERNELVER ]]; then
KDUMP_KERNELVER=$(uname -r)
nondebug_kernelver=$(sed -n -e 's/\(.*\)+debug$/\1/p' <<< "$KDUMP_KERNELVER")
# Fadump uses the regular bootloader, unlike kdump. So, use the same version
# for default kernel and capture kernel unless specified explicitly with
# KDUMP_KERNELVER option.
if ! is_fadump_capable; then
nondebug_kernelver=$(sed -n -e 's/\(.*\)+debug$/\1/p' <<< "$KDUMP_KERNELVER")
fi
fi
# Use nondebug kernel if possible, because debug kernel will consume more memory and may oom.