firecracker-microvm/firecracker v1.14.0

Firecracker v1.14.0

on GitHub

Added

• #5463: Added support for virtio-pmem devices. See documentation for more information.
• #5534: Added support for memory hot-plugging through the virtio-mem device. See documentation for more information.
• #5491: Added support for virtio-balloon free page reporting and hinting. Free page reporting is a developer preview not for production feature. See documentation for more information.

Changed

• #4028: Firecracker now creates the log and metrics files if they do not exist, simplifying the launch of Firecracker by removing a manual step.
• #5516: Balloon stats now supports guest kernel >= 6.12, adding metrics on guest OOM kills, memory allocation stalls, and memory scan/reclaim info.
• #5526: Specify IA32_MTRRdefType MSR on VM boot to allow it to set page attributes for memory regions.

Removed

• #5439: Removed the rx_partial_writes, tx_partial_reads, sync_response_fails, sync_vmm_send_timeout_count, deprecated_cmd_line_api_calls, log_fails and device_events metrics, as they were never incremented.

Fixed

• #5418: Fixed typo in Swagger definition of MmdsConfig, where the property imds_compat was spelled as imds_comat. This caused auto-generated clients to create bad requests.
• #5447: Fixed Intel AMX enabling for kernels that support dynamic XSTATE features for userspace applications but not for KVM guests (e.g. kernel versions >= 5.16 and < 5.17).
• #5485: Fixed a bug causing a read/write from an iovec to be duplicated when receiving an error on an iovec other than the first. This caused a data corruption issue in the vsock device starting from guest kernel 6.17.
• #5494: Fixed a watchdog soft lockup bug on microVMs restored from snapshots by calling KVM_KVMCLOCK_CTRL ioctl before resuming.
• #5538: Fixed a cache coherency issue on non-FWB aarch64 platforms by adding dma-coherent property to virtio-mmio nodes in the FDT.