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disk plugin: ignore loop devices

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It doesn't make sense to apply tuning parameters to loop devices, since they
point at files that live in other block devices, also subject to tuning.

Signed-off-by: Andreas Hasenack <andreas.hasenack@canonical.com>
This commit is contained in:
Andreas Hasenack 2024-09-06 16:09:28 -03:00
parent c082797fd0
commit afbfb7d0f7
1 changed files with 6 additions and 0 deletions
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6
tuned/plugins/plugin_disk.py
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@ -132,9 +132,15 @@ class DiskPlugin(hotplug.Plugin):
self._hdparm_apm_device_support[device] = True
return True
@staticmethod
def _is_loop_device(device):
LOOP_DEVICE_MAJOR = 7
return os.major(device.device_number) == LOOP_DEVICE_MAJOR
@classmethod
def _device_is_supported(cls, device):
return device.device_type == "disk" and \
not cls._is_loop_device(device) and \
device.attributes.get("removable", None) == b"0" and \
(device.parent is None or \
device.parent.subsystem in ["scsi", "virtio", "xen", "nvme"])