QEMU schema and multi-target series, PostgreSQL replication logging

QEMU developers pushed large patch series on QOM property schemas, single-binary multi-target builds, and live migration helpers. PostgreSQL hackers kept iterating on logical replication conflict history and relcache memory savings.

QEMU associates QOM properties with QAPI types

A 62-patch series on qemu-devel links QOM and qdev properties to QAPI schema types in place of ad-hoc strings. The goal is stronger introspection and a cleaner device model interface. Anyone maintaining or extending QEMU device code should track the review.

QEMU single-binary multi-target selection

Related series refactor machine type registration so one multi-target qemu-system binary can select the softmmu target via -machine without name collisions, including EmuTarget enum changes. Companion patches avoid target_info() calls during class_init for devices such as virtio-mem. Distributions that ship a unified QEMU binary gain a clearer path to multi-architecture support.

PostgreSQL conflict log history for logical replication

Hackers are actively reviewing patches that add a conflict log history table for logical replication. The table would give operators a durable record of replication conflicts. Sites that depend on logical replication stand to improve diagnostics and post-incident analysis.

Experimental VF live migration for QEMU igb

RFC series (v2 and v3) propose experimental virtual function live migration for QEMU's emulated igb device via VFIO migration v2, covering stop-copy, pre-copy, and dirty tracking. The work aims at better mobility for SR-IOV style guests. Operators who migrate VMs with passthrough NICs should follow the discussion.

QEMU cpr-luo mode for kexec host updates

A patchset introduces cpr-luo CPR mode that uses LUO and KHO so a host kernel can be updated through kexec while guest RAM is preserved. The design shortens maintenance windows without a full guest restart. Hosts that need live kernel updates under running VMs are the primary audience.

PostgreSQL relcache index shape deduplication

A patchset proposes deduplicating index shape data in the relcache and adding a proxy memory context to shrink RelationData. Lower per-relation memory use helps large catalogs. Administrators running many relations may see reduced cache pressure.