diff --git a/content/en/blog/v44.0/index.md b/content/en/blog/v44.0/index.md new file mode 100644 index 0000000..b144032 --- /dev/null +++ b/content/en/blog/v44.0/index.md @@ -0,0 +1,91 @@ +--- +title: "Cloud Hypervisor v44.0 Released!" +date: 2025-02-03T19:34:45Z +draft: false +contributors: [Cloud Hypervisor Team] +--- +# v44.0 + +This release has been tracked in our [roadmap project](https://github.com/orgs/cloud-hypervisor/projects/6) as iteration +v44.0. The following user visible changes have been made: + +### Configurable `virtio-iommu` Address Width + +The `iommu_address_width` option has been added to `--platform` to allow users +to limit the `virtio-iommu` address space in the guest. (#6900) + +### Notable Performance Improvements + +The `VIRTIO_BLK_F_SEG_MAX` feature has been enabled for `virtio-block` devices, +which brings significant performance improvements on throughput. (#6885) + +The `io_uring` entries are no longer forced to use async helper workers, +delegating the decision to the kernel. This change resolved the issue of having +excessive amount of worker threads when `io_uring` is being used, which is +expected to improve performance, such as reducing memory usage and reduce CPU +contention. + +### New Fuzzers + +Our continuous fuzzing infrastructure is augmented with two new fuzzers to cover +x86 instruction emulator and `virtio-vsock`. + +### Notable Bug Fixes + +* Fix short read and short write that impact QCOW and VHDX support. (#6884) +* Various bug fixes on VHDX support. (#6890, #6899) + +### Contributors + +Many thanks to everyone who has contributed to our release: + +* Arvind Vasudev +* Bo Chen +* Nikolay Edigaryev +* Rob Bradford +* Ruoqing He +* Wei Liu + +# v43.0 + +This release has been tracked in our [roadmap +project](https://github.com/orgs/cloud-hypervisor/projects/6) as iteration +v43.0. The following user visible changes have been made: + +### Live Migration over TCP Connections + +Support has been added to enable direct live migration from two hosts via TCP +connections. This supplements the existing support for migrating over a UNIX +socket which can then be tunnelled as desired. The documentation has been +updated. (#6850) + +### Notable Performance Improvements + +The `VIRTIO_RING_F_INDIRECT_DESC` feature has been enabled for `virtio-block` +devices. This significantly increases the throughput of the devices with a +small negative impact on latency. (#6826) + +### Notable Bug Fixes + +* Cloud Hypervisor now accepts VFIO devices that use I/O PCI BARs on non x86-64 + architectures. Whether they function depends on the host PCI host bridge + support - previously they would be rejected even if the driver did not use + these BARs. (#6871) +* Command line groups were adjusted to ensure that at least one payload + parameter was provided if any other VM parameters provided. (#6832) + +### Contributors + +Many thanks to everyone who has contributed to our release: + +* Alyssa Ross +* Andrew Consroe +* Bo Chen +* Jinrong Liang +* Julian Stecklina +* Muminul Islam +* Rob Bradford +* Ruoqing He +* Wojtek Czekalski +### Download + See the GitHub Release for the release assets.