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factor out kdump_get_arch_recommend_crashkernel

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Factor out kdump_get_arch_recommend_crashkernel to prepare for
kdump-anaconda-plugin for example to retrieve the default crashkernel
value.

Note the support of crashkenrel.default is dropped.

Reviewed-by: Pingfan Liu <piliu@redhat.com>
Reviewed-by: Philipp Rudo <prudo@redhat.com>
Signed-off-by: Coiby Xu <coxu@redhat.com>
This commit is contained in:
Coiby Xu 2021-11-16 11:26:31 +08:00
parent 34d27c4c30
commit 105c01691a
1 changed files with 36 additions and 24 deletions
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60
kdump-lib.sh
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@ -822,40 +822,52 @@ get_recommend_size()
IFS="$OLDIFS"
}
# get default crashkernel
# $1 dump mode, if not specified, dump_mode will be judged by is_fadump_capable
kdump_get_arch_recommend_crashkernel()
{
local _arch _ck_cmdline _dump_mode
if [[ -z "$1" ]]; then
if is_fadump_capable; then
_dump_mode=fadump
else
_dump_mode=kdump
fi
else
_dump_mode=$1
fi
_arch=$(uname -m)
if [[ $_arch == "x86_64" ]] || [[ $_arch == "s390x" ]]; then
_ck_cmdline="1G-4G:192M,4G-64G:256M,64G-:512M"
elif [[ $_arch == "aarch64" ]]; then
_ck_cmdline="2G-:448M"
elif [[ $_arch == "ppc64le" ]]; then
if [[ $_dump_mode == "fadump" ]]; then
_ck_cmdline="4G-16G:768M,16G-64G:1G,64G-128G:2G,128G-1T:4G,1T-2T:6G,2T-4T:12G,4T-8T:20G,8T-16T:36G,16T-32T:64G,32T-64T:128G,64T-:180G"
else
_ck_cmdline="2G-4G:384M,4G-16G:512M,16G-64G:1G,64G-128G:2G,128G-:4G"
fi
fi
_ck_cmdline=${_ck_cmdline//-:/-102400T:}
echo -n "$_ck_cmdline"
}
# return recommended size based on current system RAM size
# $1: kernel version, if not set, will defaults to $(uname -r)
kdump_get_arch_recommend_size()
{
local kernel=$1 arch
local _ck_cmdline
if ! [[ -r "/proc/iomem" ]]; then
echo "Error, can not access /proc/iomem."
return 1
fi
[[ -z $kernel ]] && kernel=$(uname -r)
ck_cmdline=$(cat "/usr/lib/modules/$kernel/crashkernel.default" 2> /dev/null)
if [[ -n $ck_cmdline ]]; then
ck_cmdline=${ck_cmdline#crashkernel=}
else
arch=$(lscpu | grep Architecture | awk -F ":" '{ print $2 }' | tr '[:lower:]' '[:upper:]')
if [[ $arch == "X86_64" ]] || [[ $arch == "S390X" ]]; then
ck_cmdline="1G-4G:192M,4G-64G:256M,64G-:512M"
elif [[ $arch == "AARCH64" ]]; then
ck_cmdline="2G-:448M"
elif [[ $arch == "PPC64LE" ]]; then
if is_fadump_capable; then
ck_cmdline="4G-16G:768M,16G-64G:1G,64G-128G:2G,128G-1T:4G,1T-2T:6G,2T-4T:12G,4T-8T:20G,8T-16T:36G,16T-32T:64G,32T-64T:128G,64T-:180G"
else
ck_cmdline="2G-4G:384M,4G-16G:512M,16G-64G:1G,64G-128G:2G,128G-:4G"
fi
fi
fi
ck_cmdline=${ck_cmdline//-:/-102400T:}
sys_mem=$(get_system_size)
_ck_cmdline=$(kdump_get_arch_recommend_crashkernel)
get_recommend_size "$sys_mem" "$ck_cmdline"
}