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|
{
pkgs,
...
}:
let
qemu-img = pkgs.lib.getExe' pkgs.vmTools.qemu "qemu-img";
empty = pkgs.runCommand "empty.qcow2" { } ''
${qemu-img} create -f qcow2 "$out" 32M
'';
in
{
name = "iosched";
meta.maintainers = with pkgs.lib.maintainers; [ mvs ];
nodes.machine = {
virtualisation.qemu.options = [
"-drive"
"id=sda,if=none,format=qcow2,readonly=on,file=${empty}"
"-drive"
"id=sdb,if=none,format=qcow2,readonly=on,file=${empty}"
"-drive"
"id=nvme0n1,if=none,format=qcow2,readonly=on,file=${empty}"
"-drive"
"id=mmcblk0,if=none,format=qcow2,file=./mmcblk0.qcow2"
"-device"
"virtio-scsi-pci,id=scsi0"
"-device"
"sdhci-pci"
"-device"
"scsi-hd,rotation_rate=1,bus=scsi0.0,drive=sda"
"-device"
"scsi-hd,rotation_rate=7200,bus=scsi0.0,drive=sdb"
"-device"
"sd-card,drive=mmcblk0"
"-device"
"nvme,serial=deadbeef,drive=nvme0n1"
];
hardware.block = {
defaultScheduler = "none";
defaultSchedulerRotational = "mq-deadline";
scheduler = {
"nvme[0-9]*" = "kyber";
"mmcblk[0-9]*" = "bfq";
};
};
};
testScript = ''
import subprocess
def check_scheduler(dev, scheduler):
machine.succeed("grep -F -q '[{}]' /sys/block/{}/queue/scheduler".format(scheduler, dev))
subprocess.check_call([
"${qemu-img}", "create", "-f", "qcow2", "vm-state-machine/mmcblk0.qcow2", "32M"
])
machine.start()
machine.succeed("udevadm verify --no-style")
check_scheduler("sda", "none")
check_scheduler("sdb", "mq-deadline")
check_scheduler("nvme0n1", "kyber")
check_scheduler("mmcblk0", "bfq")
machine.succeed("tmp=\"$(mktemp)\"; losetup /dev/loop0 \"$tmp\"")
check_scheduler("loop0", "none")
'';
}
|
