Managing applications, like oVirt (http://www.ovirt.org), make extensive use of thin-provisioned disk images. To let the guest run smoothly and be not unnecessarily paused, oVirt sets a disk usage threshold (so called 'high water mark') based on the occupation of the device, and automatically extends the image once the threshold is reached or exceeded. In order to detect the crossing of the threshold, oVirt has no choice but aggressively polling the QEMU monitor using the query-blockstats command. This lead to unnecessary system load, and is made even worse under scale: deployments with hundreds of VMs are no longer rare. To fix this, this patch adds: * A new monitor command `block-set-write-threshold', to set a mark for a given block device. * A new event `BLOCK_WRITE_THRESHOLD', to report if a block device usage exceeds the threshold. * A new `write_threshold' field into the `BlockDeviceInfo' structure, to report the configured threshold. This will allow the managing application to use smarter and more efficient monitoring, greatly reducing the need of polling. [Updated qemu-iotests 067 output to add the new 'write_threshold' property. --Stefan] [Changed g_assert_false() to !g_assert() to fix the build on older glib versions. --Kevin] Signed-off-by: Francesco Romani <fromani@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1421068273-692-1-git-send-email-fromani@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
776 lines
17 KiB
Plaintext
776 lines
17 KiB
Plaintext
QA output created by 067
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
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=== -drive/-device and device_del ===
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Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,if=none,id=disk -device virtio-blk-pci,drive=disk,id=virtio0
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{
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QMP_VERSION
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}
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{
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"return": {
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}
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}
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{
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"return": [
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{
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"io-status": "ok",
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"device": "disk",
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"locked": false,
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"removable": false,
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"inserted": {
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"iops_rd": 0,
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"detect_zeroes": "off",
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"image": {
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"virtual-size": 134217728,
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"filename": "TEST_DIR/t.qcow2",
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"cluster-size": 65536,
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"format": "qcow2",
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"actual-size": SIZE,
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"format-specific": {
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"type": "qcow2",
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"data": {
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"compat": "1.1",
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"lazy-refcounts": false,
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"corrupt": false
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}
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},
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"dirty-flag": false
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},
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"iops_wr": 0,
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"ro": false,
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"backing_file_depth": 0,
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"drv": "qcow2",
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"iops": 0,
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"bps_wr": 0,
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"write_threshold": 0,
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"encrypted": false,
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"bps": 0,
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"bps_rd": 0,
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"cache": {
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"no-flush": false,
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"direct": false,
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"writeback": true
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},
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"file": "TEST_DIR/t.qcow2",
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"encryption_key_missing": false
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},
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"type": "unknown"
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},
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{
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"io-status": "ok",
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"device": "ide1-cd0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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},
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{
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"device": "floppy0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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},
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{
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"device": "sd0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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}
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]
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}
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{
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"return": {
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}
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}
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{
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"return": {
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}
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "DEVICE_DELETED",
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"data": {
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"path": "/machine/peripheral/virtio0/virtio-backend"
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}
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "DEVICE_DELETED",
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"data": {
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"device": "virtio0",
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"path": "/machine/peripheral/virtio0"
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}
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "RESET"
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}
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{
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"return": [
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{
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"io-status": "ok",
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"device": "ide1-cd0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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},
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{
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"device": "floppy0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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},
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{
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"device": "sd0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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}
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]
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}
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{
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"return": {
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}
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "SHUTDOWN"
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "DEVICE_TRAY_MOVED",
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"data": {
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"device": "ide1-cd0",
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"tray-open": true
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}
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "DEVICE_TRAY_MOVED",
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"data": {
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"device": "floppy0",
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"tray-open": true
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}
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}
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=== -drive/device_add and device_del ===
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Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,if=none,id=disk
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{
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QMP_VERSION
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}
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{
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"return": {
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}
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}
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{
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"return": [
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{
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"device": "disk",
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"locked": false,
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"removable": true,
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"inserted": {
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"iops_rd": 0,
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"detect_zeroes": "off",
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"image": {
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"virtual-size": 134217728,
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"filename": "TEST_DIR/t.qcow2",
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"cluster-size": 65536,
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"format": "qcow2",
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"actual-size": SIZE,
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"format-specific": {
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"type": "qcow2",
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"data": {
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"compat": "1.1",
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"lazy-refcounts": false,
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"corrupt": false
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}
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},
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"dirty-flag": false
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},
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"iops_wr": 0,
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"ro": false,
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"backing_file_depth": 0,
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"drv": "qcow2",
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"iops": 0,
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"bps_wr": 0,
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"write_threshold": 0,
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"encrypted": false,
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"bps": 0,
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"bps_rd": 0,
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"cache": {
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"no-flush": false,
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"direct": false,
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"writeback": true
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},
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"file": "TEST_DIR/t.qcow2",
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"encryption_key_missing": false
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},
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"tray_open": false,
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"type": "unknown"
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},
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{
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"io-status": "ok",
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"device": "ide1-cd0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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},
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{
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"device": "floppy0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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},
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{
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"device": "sd0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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}
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]
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}
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{
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"return": {
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}
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}
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{
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"return": {
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}
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}
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{
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"return": {
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}
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "DEVICE_DELETED",
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"data": {
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"path": "/machine/peripheral/virtio0/virtio-backend"
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}
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "DEVICE_DELETED",
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"data": {
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"device": "virtio0",
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"path": "/machine/peripheral/virtio0"
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}
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "RESET"
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}
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{
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"return": [
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{
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"io-status": "ok",
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"device": "ide1-cd0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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},
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{
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"device": "floppy0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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},
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{
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"device": "sd0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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}
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]
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}
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{
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"return": {
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}
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "SHUTDOWN"
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "DEVICE_TRAY_MOVED",
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"data": {
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"device": "ide1-cd0",
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"tray-open": true
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}
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "DEVICE_TRAY_MOVED",
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"data": {
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"device": "floppy0",
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"tray-open": true
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}
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}
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=== drive_add/device_add and device_del ===
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Testing:
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{
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QMP_VERSION
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}
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{
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"return": {
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}
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}
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{
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"return": "OK\r\n"
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}
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{
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"return": [
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{
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"io-status": "ok",
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"device": "ide1-cd0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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},
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{
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"device": "floppy0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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},
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{
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"device": "sd0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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},
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{
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"device": "disk",
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"locked": false,
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"removable": true,
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"inserted": {
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"iops_rd": 0,
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"detect_zeroes": "off",
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"image": {
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"virtual-size": 134217728,
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"filename": "TEST_DIR/t.qcow2",
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"cluster-size": 65536,
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"format": "qcow2",
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"actual-size": SIZE,
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"format-specific": {
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"type": "qcow2",
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"data": {
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"compat": "1.1",
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"lazy-refcounts": false,
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"corrupt": false
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}
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},
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"dirty-flag": false
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},
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"iops_wr": 0,
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"ro": false,
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"backing_file_depth": 0,
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"drv": "qcow2",
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"iops": 0,
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"bps_wr": 0,
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"write_threshold": 0,
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"encrypted": false,
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"bps": 0,
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"bps_rd": 0,
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"cache": {
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"no-flush": false,
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"direct": false,
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"writeback": true
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},
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"file": "TEST_DIR/t.qcow2",
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"encryption_key_missing": false
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},
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"tray_open": false,
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"type": "unknown"
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}
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]
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}
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{
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"return": {
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}
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}
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{
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"return": {
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}
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}
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{
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"return": {
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}
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "DEVICE_DELETED",
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"data": {
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"path": "/machine/peripheral/virtio0/virtio-backend"
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}
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "DEVICE_DELETED",
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"data": {
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"device": "virtio0",
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"path": "/machine/peripheral/virtio0"
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}
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "RESET"
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}
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{
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"return": [
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{
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"io-status": "ok",
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"device": "ide1-cd0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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},
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{
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"device": "floppy0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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},
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{
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"device": "sd0",
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"locked": false,
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"removable": true,
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"tray_open": false,
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"type": "unknown"
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}
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]
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}
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{
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"return": {
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}
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "SHUTDOWN"
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "DEVICE_TRAY_MOVED",
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"data": {
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"device": "ide1-cd0",
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"tray-open": true
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}
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}
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{
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"timestamp": {
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"seconds": TIMESTAMP,
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"microseconds": TIMESTAMP
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},
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"event": "DEVICE_TRAY_MOVED",
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"data": {
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"device": "floppy0",
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"tray-open": true
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}
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}
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|
|
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|
=== blockdev_add/device_add and device_del ===
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|
|
|
Testing:
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|
{
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|
QMP_VERSION
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|
}
|
|
{
|
|
"return": {
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|
}
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|
}
|
|
{
|
|
"return": {
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}
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|
}
|
|
{
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|
"return": [
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|
{
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|
"io-status": "ok",
|
|
"device": "ide1-cd0",
|
|
"locked": false,
|
|
"removable": true,
|
|
"tray_open": false,
|
|
"type": "unknown"
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|
},
|
|
{
|
|
"device": "floppy0",
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|
"locked": false,
|
|
"removable": true,
|
|
"tray_open": false,
|
|
"type": "unknown"
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|
},
|
|
{
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|
"device": "sd0",
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|
"locked": false,
|
|
"removable": true,
|
|
"tray_open": false,
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|
"type": "unknown"
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},
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|
{
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|
"device": "disk",
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|
"locked": false,
|
|
"removable": true,
|
|
"inserted": {
|
|
"iops_rd": 0,
|
|
"detect_zeroes": "off",
|
|
"image": {
|
|
"virtual-size": 134217728,
|
|
"filename": "TEST_DIR/t.qcow2",
|
|
"cluster-size": 65536,
|
|
"format": "qcow2",
|
|
"actual-size": SIZE,
|
|
"format-specific": {
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|
"type": "qcow2",
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|
"data": {
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|
"compat": "1.1",
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|
"lazy-refcounts": false,
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|
"corrupt": false
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|
}
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|
},
|
|
"dirty-flag": false
|
|
},
|
|
"iops_wr": 0,
|
|
"ro": false,
|
|
"backing_file_depth": 0,
|
|
"drv": "qcow2",
|
|
"iops": 0,
|
|
"bps_wr": 0,
|
|
"write_threshold": 0,
|
|
"encrypted": false,
|
|
"bps": 0,
|
|
"bps_rd": 0,
|
|
"cache": {
|
|
"no-flush": false,
|
|
"direct": false,
|
|
"writeback": true
|
|
},
|
|
"file": "TEST_DIR/t.qcow2",
|
|
"encryption_key_missing": false
|
|
},
|
|
"tray_open": false,
|
|
"type": "unknown"
|
|
}
|
|
]
|
|
}
|
|
{
|
|
"return": {
|
|
}
|
|
}
|
|
{
|
|
"return": {
|
|
}
|
|
}
|
|
{
|
|
"return": {
|
|
}
|
|
}
|
|
{
|
|
"timestamp": {
|
|
"seconds": TIMESTAMP,
|
|
"microseconds": TIMESTAMP
|
|
},
|
|
"event": "DEVICE_DELETED",
|
|
"data": {
|
|
"path": "/machine/peripheral/virtio0/virtio-backend"
|
|
}
|
|
}
|
|
{
|
|
"timestamp": {
|
|
"seconds": TIMESTAMP,
|
|
"microseconds": TIMESTAMP
|
|
},
|
|
"event": "DEVICE_DELETED",
|
|
"data": {
|
|
"device": "virtio0",
|
|
"path": "/machine/peripheral/virtio0"
|
|
}
|
|
}
|
|
{
|
|
"timestamp": {
|
|
"seconds": TIMESTAMP,
|
|
"microseconds": TIMESTAMP
|
|
},
|
|
"event": "RESET"
|
|
}
|
|
{
|
|
"return": [
|
|
{
|
|
"io-status": "ok",
|
|
"device": "ide1-cd0",
|
|
"locked": false,
|
|
"removable": true,
|
|
"tray_open": false,
|
|
"type": "unknown"
|
|
},
|
|
{
|
|
"device": "floppy0",
|
|
"locked": false,
|
|
"removable": true,
|
|
"tray_open": false,
|
|
"type": "unknown"
|
|
},
|
|
{
|
|
"device": "sd0",
|
|
"locked": false,
|
|
"removable": true,
|
|
"tray_open": false,
|
|
"type": "unknown"
|
|
},
|
|
{
|
|
"io-status": "ok",
|
|
"device": "disk",
|
|
"locked": false,
|
|
"removable": true,
|
|
"inserted": {
|
|
"iops_rd": 0,
|
|
"detect_zeroes": "off",
|
|
"image": {
|
|
"virtual-size": 134217728,
|
|
"filename": "TEST_DIR/t.qcow2",
|
|
"cluster-size": 65536,
|
|
"format": "qcow2",
|
|
"actual-size": SIZE,
|
|
"format-specific": {
|
|
"type": "qcow2",
|
|
"data": {
|
|
"compat": "1.1",
|
|
"lazy-refcounts": false,
|
|
"corrupt": false
|
|
}
|
|
},
|
|
"dirty-flag": false
|
|
},
|
|
"iops_wr": 0,
|
|
"ro": false,
|
|
"backing_file_depth": 0,
|
|
"drv": "qcow2",
|
|
"iops": 0,
|
|
"bps_wr": 0,
|
|
"write_threshold": 0,
|
|
"encrypted": false,
|
|
"bps": 0,
|
|
"bps_rd": 0,
|
|
"cache": {
|
|
"no-flush": false,
|
|
"direct": false,
|
|
"writeback": true
|
|
},
|
|
"file": "TEST_DIR/t.qcow2",
|
|
"encryption_key_missing": false
|
|
},
|
|
"tray_open": false,
|
|
"type": "unknown"
|
|
}
|
|
]
|
|
}
|
|
{
|
|
"return": {
|
|
}
|
|
}
|
|
{
|
|
"timestamp": {
|
|
"seconds": TIMESTAMP,
|
|
"microseconds": TIMESTAMP
|
|
},
|
|
"event": "SHUTDOWN"
|
|
}
|
|
{
|
|
"timestamp": {
|
|
"seconds": TIMESTAMP,
|
|
"microseconds": TIMESTAMP
|
|
},
|
|
"event": "DEVICE_TRAY_MOVED",
|
|
"data": {
|
|
"device": "ide1-cd0",
|
|
"tray-open": true
|
|
}
|
|
}
|
|
{
|
|
"timestamp": {
|
|
"seconds": TIMESTAMP,
|
|
"microseconds": TIMESTAMP
|
|
},
|
|
"event": "DEVICE_TRAY_MOVED",
|
|
"data": {
|
|
"device": "floppy0",
|
|
"tray-open": true
|
|
}
|
|
}
|
|
|
|
*** done
|