tools/testing/selftests/kvm/x86/nx_huge_pages_test.sh

Source file repositories/reference/linux-study-clean/tools/testing/selftests/kvm/x86/nx_huge_pages_test.sh

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/kvm/x86/nx_huge_pages_test.sh
Extension
.sh
Size
2197 bytes
Lines
70
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

function do_sudo () {
		"$@"
	}
else
	function do_sudo () {
		sudo "$@"
	}
fi

set +e

function sudo_echo () {
	echo "$1" | do_sudo tee -a "$2" > /dev/null
}

NXECUTABLE="$(dirname $0)/nx_huge_pages_test"

sudo_echo test /dev/null || exit 4 # KSFT_SKIP=4

(
	set -e

	sudo_echo 1 /sys/module/kvm/parameters/nx_huge_pages
	sudo_echo 1 /sys/module/kvm/parameters/nx_huge_pages_recovery_ratio
	sudo_echo 100 /sys/module/kvm/parameters/nx_huge_pages_recovery_period_ms
	sudo_echo "$(( $HUGE_PAGES + 3 ))" /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages

	# Test with reboot permissions
	if [ $(whoami) == "root" ] || sudo setcap cap_sys_boot+ep $NXECUTABLE 2> /dev/null; then
		echo Running test with CAP_SYS_BOOT enabled
		$NXECUTABLE -t 887563923 -p 100 -r
		test $(whoami) == "root" || sudo setcap cap_sys_boot-ep $NXECUTABLE
	else
		echo setcap failed, skipping nx_huge_pages_test with CAP_SYS_BOOT enabled
	fi

	# Test without reboot permissions
	if [ $(whoami) != "root" ] ; then
		echo Running test with CAP_SYS_BOOT disabled
		$NXECUTABLE -t 887563923 -p 100
	else
		echo Running as root, skipping nx_huge_pages_test with CAP_SYS_BOOT disabled
	fi
)
RET=$?

sudo_echo "$NX_HUGE_PAGES" /sys/module/kvm/parameters/nx_huge_pages
sudo_echo "$NX_HUGE_PAGES_RECOVERY_RATIO" /sys/module/kvm/parameters/nx_huge_pages_recovery_ratio
sudo_echo "$NX_HUGE_PAGES_RECOVERY_PERIOD" /sys/module/kvm/parameters/nx_huge_pages_recovery_period_ms
sudo_echo "$HUGE_PAGES" /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages

exit $RET

Annotation

Implementation Notes