PostgreSQL standby checksum bugs and QEMU machine, migration work

PostgreSQL developers examined offline checksum changes that can leave standbys with mismatched or unreadable state. QEMU activity centered on new machine models, QOM property infrastructure, SMMUv3 secure state, and several live migration series.

Offline checksum changes break PostgreSQL standby state

A pgsql-hackers thread reports bugs in which offline data checksum changes leave standbys with mismatched or unreadable checksum state. Discussion among four participants spans 37 messages and includes ongoing patch work. Operators running checksum-enabled high-availability clusters need to track the fixes before altering checksum settings offline.

QEMU adds Raspberry Pi Pico and RP2040 machine model

An RFC v3 series of 36 patches introduces a Raspberry Pi Pico and RP2040 machine model to QEMU. The patches cover DMA, XIP, boot ROM, USB, and accompanying tests. The addition expands QEMU coverage for a widely used microcontroller platform in embedded development.

QOM and qdev properties tied to QAPI schema types

A 75-patch series associates QOM and qdev properties with QAPI schema types to improve introspection. The changes reach core infrastructure and many files. Tooling and management layers that depend on accurate device property discovery benefit from the tighter schema linkage.

SMMUv3 Secure state support reaches RFC v5

A 28-patch RFC v5 series adds Secure state support to QEMU's SMMUv3 model. Five participants continue active review of the ARM IOMMU emulation changes. The work matters for accurate modeling of TrustZone-capable ARM platforms.

vfio-user gains live migration support

An eight-patch series adds live migration to vfio-user by extending the protocol and abstracting VFIO migration I/O. Three participants discussed the proposal. The feature lets devices backed by vfio-user migrate without a full stop of the guest.

Experimental VF live migration for emulated igb

RFC v2 delivers nine patches that add experimental VF live migration to QEMU's emulated igb device. The approach combines stop-copy, pre-copy, and dirty tracking through VFIO migration v2. Network virtual-function migration remains an active area of QEMU development.

Phytium E2000Q SoC and boards added to QEMU

Bin Meng posted a v2 series of 32 patches that introduce the Phytium E2000Q heterogeneous Arm SoC, two boards, peripherals, documentation, and tests. The series brings another Arm server-class platform into QEMU. Developers targeting Phytium hardware obtain a usable emulation path.

virtio-gpu and dmabuf ownership cleanup

A v2 series of 25 patches cleans up virtio-gpu scanout and dmabuf ownership and addresses issues found while working on CVE-2026-66020. Two participants reviewed the security-related changes. Graphics device correctness and prior vulnerability remediation motivate the series.