From: Peter Krempa <[email protected]> Discards ought to be forwarded to the protocol nodes where we control if discard actually happens.
Unconditionally enable discard='unmap' for the intermediate layer. Closes: https://gitlab.com/libvirt/libvirt/-/issues/810 Signed-off-by: Peter Krempa <[email protected]> --- src/qemu/qemu_block.c | 1 + .../qemuxmlconfdata/throttlefilter.x86_64-latest.args | 10 +++++----- 2 files changed, 6 insertions(+), 5 deletions(-) diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c index daefeb2f45..194f8407e3 100644 --- a/src/qemu/qemu_block.c +++ b/src/qemu/qemu_block.c @@ -2751,6 +2751,7 @@ qemuBlockThrottleFilterGetProps(virDomainThrottleFilterDef *filter, "s:node-name", qemuBlockThrottleFilterGetNodename(filter), "s:throttle-group", prefixed_group_name, "s:file", parentNodeName, + "s:discard", "unmap", NULL) < 0) return NULL; diff --git a/tests/qemuxmlconfdata/throttlefilter.x86_64-latest.args b/tests/qemuxmlconfdata/throttlefilter.x86_64-latest.args index 6a37f5835a..95914ef5ce 100644 --- a/tests/qemuxmlconfdata/throttlefilter.x86_64-latest.args +++ b/tests/qemuxmlconfdata/throttlefilter.x86_64-latest.args @@ -34,18 +34,18 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \ -device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \ -blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-8-storage","auto-read-only":true,"discard":"unmap","cache":{"direct":true,"no-flush":false}}' \ -blockdev '{"node-name":"libvirt-8-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-8-storage"}' \ --blockdev '{"driver":"throttle","node-name":"libvirt-9-filter","throttle-group":"throttle-limit0","file":"libvirt-8-format"}' \ +-blockdev '{"driver":"throttle","node-name":"libvirt-9-filter","throttle-group":"throttle-limit0","file":"libvirt-8-format","discard":"unmap"}' \ -device '{"driver":"virtio-blk-pci","bus":"pci.0","addr":"0x4","drive":"libvirt-9-filter","id":"virtio-disk0","bootindex":1,"write-cache":"on"}' \ -blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest2","node-name":"libvirt-5-storage","auto-read-only":true,"discard":"unmap","cache":{"direct":true,"no-flush":false}}' \ -blockdev '{"node-name":"libvirt-5-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-5-storage"}' \ --blockdev '{"driver":"throttle","node-name":"libvirt-6-filter","throttle-group":"throttle-limit1","file":"libvirt-5-format"}' \ --blockdev '{"driver":"throttle","node-name":"libvirt-7-filter","throttle-group":"throttle-limit12","file":"libvirt-6-filter"}' \ +-blockdev '{"driver":"throttle","node-name":"libvirt-6-filter","throttle-group":"throttle-limit1","file":"libvirt-5-format","discard":"unmap"}' \ +-blockdev '{"driver":"throttle","node-name":"libvirt-7-filter","throttle-group":"throttle-limit12","file":"libvirt-6-filter","discard":"unmap"}' \ -device '{"driver":"virtio-blk-pci","bus":"pci.0","addr":"0x5","drive":"libvirt-7-filter","id":"virtio-disk1","write-cache":"on"}' \ -blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest3","node-name":"libvirt-2-storage","auto-read-only":true,"discard":"unmap","cache":{"direct":true,"no-flush":false}}' \ -blockdev '{"node-name":"libvirt-2-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-2-storage"}' \ -blockdev '{"driver":"copy-on-read","node-name":"libvirt-CoR-vdc","file":"libvirt-2-format","discard":"unmap"}' \ --blockdev '{"driver":"throttle","node-name":"libvirt-3-filter","throttle-group":"throttle-limit2","file":"libvirt-CoR-vdc"}' \ --blockdev '{"driver":"throttle","node-name":"libvirt-4-filter","throttle-group":"throttle-limit12","file":"libvirt-3-filter"}' \ +-blockdev '{"driver":"throttle","node-name":"libvirt-3-filter","throttle-group":"throttle-limit2","file":"libvirt-CoR-vdc","discard":"unmap"}' \ +-blockdev '{"driver":"throttle","node-name":"libvirt-4-filter","throttle-group":"throttle-limit12","file":"libvirt-3-filter","discard":"unmap"}' \ -device '{"driver":"virtio-blk-pci","bus":"pci.0","addr":"0x6","drive":"libvirt-4-filter","id":"virtio-disk2","write-cache":"on"}' \ -blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest4","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap","cache":{"direct":true,"no-flush":false}}' \ -blockdev '{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage"}' \ -- 2.51.0
