NAS-135033 / 25.04.1 / zed: Ensure spare activation after kernel-initiated device removal #289
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In addition to hotplug events, the kernel may also mark a failing vdev as REMOVED. This was observed in a customer report and reproduced by forcing the NVMe host driver to disable the device after a failed reset due to command timeout. In such cases, the spare was not activated because the device had already transitioned to a REMOVED state before zed processed the event. To address this, explicitly attempt hot spare activation when the kernel marks a device as REMOVED. Signed-off-by: Ameer Hamza <[email protected]>
bugclerk
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amotin
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Mar 28, 2025
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Motivation and Context
zed fails to activate hotspare if a device is removed by the kernel.
Description
In addition to hotplug events, the kernel may also mark a failing vdev as REMOVED. This was observed in one of our customer report and reproduced by forcing the NVMe host driver to disable the device after a failed reset due to command timeout. In such cases, the spare was not activated because the device had already transitioned to a REMOVED state before zed processed the event.
To address this, explicitly attempt hot spare activation when the kernel marks a device as REMOVED.
How Has This Been Tested?
Types of changes
Checklist:
Signed-off-by.