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diff --git a/tuned/plugins/plugin_disk.py b/tuned/plugins/plugin_disk.py
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index 69efbf7..8de4531 100644
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--- a/tuned/plugins/plugin_disk.py
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+++ b/tuned/plugins/plugin_disk.py
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@@ -200,8 +200,15 @@ class DiskPlugin(hotplug.Plugin):
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def _instance_unapply_dynamic(self, instance, device):
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pass
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+ def _sysfs_path(self, device, suffix, prefix = "/sys/block/"):
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+ if "/" in device:
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+ dev = os.path.join(prefix, device.replace("/", "!"), suffix)
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+ if os.path.exists(dev):
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+ return dev
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+ return os.path.join(prefix, device, suffix)
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+
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def _elevator_file(self, device):
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- return os.path.join("/sys/block/", device, "queue/scheduler")
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+ return self._sysfs_path(device, "queue/scheduler")
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@command_set("elevator", per_device=True)
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def _set_elevator(self, value, device, sim):
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@@ -296,7 +303,7 @@ class DiskPlugin(hotplug.Plugin):
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return 253
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def _readahead_file(self, device):
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- return os.path.join("/sys/block/", device, "queue/read_ahead_kb")
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+ return self._sysfs_path(device, "queue/read_ahead_kb")
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def _parse_ra(self, value):
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val = str(value).split(None, 1)
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@@ -342,7 +349,7 @@ class DiskPlugin(hotplug.Plugin):
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self._storage.unset(storage_key)
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def _scheduler_quantum_file(self, device):
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- return os.path.join("/sys/block/", device, "queue/iosched/quantum")
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+ return self._sysfs_path(device, "queue/iosched/quantum")
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@command_set("scheduler_quantum", per_device=True)
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def _set_scheduler_quantum(self, value, device, sim):
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