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udev/rules.d: make virtio-blk devices non-rotational

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Performance measurements turned out that in certain situations the
paging/swap logic turns on the rotational feature for block devices. In the
past, this feature has been disabled for DASD devices. FCP and NVMe devices
are considered non-rotational by default (or exposed by the storage server).
Because those are the backing devices on Linux on Z/LinuxONE instances,
ensure that virtio-blk devices are always non-rotational.

Signed-off-by: Peter Jin <pjin@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Peter Jin
2025-10-01 15:02:10 -04:00
committed by Jan Höppner
parent b21a824fda
commit 82f8c137e1
1 changed files with 1 additions and 0 deletions
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etc/udev/rules.d/59-virtio-blk.rules Normal file
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SUBSYSTEM=="block", ACTION=="add", KERNEL=="vd*[!0-9]", TEST=="queue/rotational", ATTR{queue/rotational}="0"