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　晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 . Prv8 Shell

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Directory : /lib/dracut/modules.d/99earlykdump/

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Current File : //lib/dracut/modules.d/99earlykdump/early-kdump.sh

#! /bin/sh

KEXEC=/sbin/kexec
standard_kexec_args="-p"

EARLY_KDUMP_INITRD=""
EARLY_KDUMP_KERNEL=""
EARLY_KDUMP_CMDLINE=""
EARLY_KDUMP_KERNELVER=""
EARLY_KEXEC_ARGS=""

. /etc/sysconfig/kdump
. /lib/dracut-lib.sh
. /lib/kdump-lib.sh
. /lib/kdump-logger.sh

#initiate the kdump logger
dlog_init
if [ $? -ne 0 ]; then
        echo "failed to initiate the kdump logger."
        exit 1
fi

prepare_parameters()
{
    EARLY_KDUMP_CMDLINE=$(prepare_cmdline "${KDUMP_COMMANDLINE}" "${KDUMP_COMMANDLINE_REMOVE}" "${KDUMP_COMMANDLINE_APPEND}")
    EARLY_KDUMP_KERNEL="/boot/kernel-earlykdump"
    EARLY_KDUMP_INITRD="/boot/initramfs-earlykdump"
}

early_kdump_load()
{
    check_kdump_feasibility
    if [ $? -ne 0 ]; then
        return 1
    fi

    if is_fadump_capable; then
        dwarn "WARNING: early kdump doesn't support fadump."
        return 1
    fi

    check_current_kdump_status
    if [ $? == 0 ]; then
        return 1
    fi

    prepare_parameters

    EARLY_KEXEC_ARGS=$(prepare_kexec_args "${KEXEC_ARGS}")

    # Here, only output the messages, but do not save these messages
    # to a file because the target disk may not be mounted yet, the
    # earlykdump is too early.
    ddebug "earlykdump: $KEXEC ${EARLY_KEXEC_ARGS} $standard_kexec_args \
	--command-line=$EARLY_KDUMP_CMDLINE --initrd=$EARLY_KDUMP_INITRD \
	$EARLY_KDUMP_KERNEL"

    $KEXEC ${EARLY_KEXEC_ARGS} $standard_kexec_args \
        --command-line="$EARLY_KDUMP_CMDLINE" \
        --initrd=$EARLY_KDUMP_INITRD $EARLY_KDUMP_KERNEL
    if [ $? == 0 ]; then
        dinfo "kexec: loaded early-kdump kernel"
        return 0
    else
        derror "kexec: failed to load early-kdump kernel"
        return 1
    fi
}

set_early_kdump()
{
    if getargbool 0 rd.earlykdump; then
        dinfo "early-kdump is enabled."
        early_kdump_load
    else
        dinfo "early-kdump is disabled."
    fi

    return 0
}

set_early_kdump

haha - 2025