diff --git a/kdumpctl b/kdumpctl
index d4e0050..2e73f31 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -110,71 +110,6 @@ append_cmdline()
 	echo $cmdline
 }
 
-# Check the number of cpus for kdump kernel to boot with.
-# We met an issue on x86_64: kdump runs out of vectors with
-# "nr_cpus=1" when requesting tons of irqs, so here we check
-# "nr_cpus=1" and warn users if kdump probably can't work.
-check_kdump_cpus()
-{
-	local nr_origin nr_min nr_max
-	local arch=$(uname -m) cmdline=$KDUMP_COMMANDLINE_APPEND
-
-	if [ $arch != "x86_64" ]; then
-		return
-	fi
-
-	# We only care about the default "nr_cpus=1".
-	echo $cmdline | grep -E -q "nr_cpus=1[[:space:]]*|nr_cpus=1$"
-	if [ $? -ne 0 ]; then
-		return
-	fi
-
-	nr_origin=1
-
-	# Online cpus in first kernel.
-	nr_max=$(grep -c '^processor' /proc/cpuinfo)
-
-	# To calculate the estimated minimal cpus required.
-	nr_min=$(ls -ld /proc/irq/*/ | wc -l)
-
-	# Vectors for io device start from FIRST_EXTERNAL_VECTOR(32),
-	# some high-numbered ones starting from FIRST_EXTERNAL_VECTOR
-	# are reserved for system internal uses.
-	#
-	# We use a flexible variance and assume there are 32 reserved
-	# from FIRST_EXTERNAL_VECTOR. Then the total vectors for device
-	# interrupts percpu is: (256-32)-32=192.
-	#
-	# For "nr_cpus=1", irq and vector have the 1:1 mapping.
-	nr_min=$(($nr_min + 192 - 1))
-	nr_min=$(($nr_min / 192))
-	if [ $nr_min -gt 1 ]; then
-		# The system seems to have tons of interrupts. We need
-		# some further calculation of the number of cpus(>1).
-		# For "nr_cpus>1", irq and vector have the 1:M mapping,
-		# multiple-cpu affinity can consume multiple vectors.
-		# Luckily for x2apic which is commonly deployed on large
-		# modern machines, default case of boot, device bringup
-		# etc will use a single cpu to minimize vector pressure.
-		#
-		# For further safety, we add one more cpu and round it
-		# up to an even number.
-		nr_min=$(($nr_min + 1))
-		nr_min=$(($nr_min + $nr_min % 2))
-	fi
-
-	if [ $nr_min -gt $nr_max ]; then
-		nr_min=$nr_max
-	fi
-
-	if [ $nr_origin -ge $nr_min ]; then
-		return
-	fi
-
-	echo -n "Warning: nr_cpus=1 may not be enough for kdump boot,"
-	echo " try nr_cpus=$nr_min or larger instead"
-}
-
 # This function performs a series of edits on the command line.
 # Store the final result in global $KDUMP_COMMANDLINE.
 prepare_cmdline()
@@ -211,8 +146,6 @@ prepare_cmdline()
 	fi
 
 	KDUMP_COMMANDLINE=$cmdline
-
-	check_kdump_cpus
 }