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Under a 100 ms goal for the first SSH login, 0005's 6 ms is 6% of it. 0006 starts the BTF parse with async_schedule() from a core_initcall, so it runs beside the initcalls rather than inside inet_init, where it was 11.2 of 11.8 ms traced on the bench fleet (lab run 43498943572). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The memmap of a 2 GiB guest was initialised on the boot CPU in early boot: a 5.2 ms gap after the zone ranges in boot:initcalls on the bench fleet (lab run 43495583323). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…l at its p50 stamp Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…the log of 2026-11-13's afternoon driver_async_probe for rng, balloon and vsock: the first SSH login of a minimal init 214 -> 209 ms on the bench fleet with the kernel patches beside it. docs/log.md records the floor without systemd, the metal fleet that has not run yet, where the kernel's time goes, and the configuration-space snapshot measured and rejected. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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What the bench fleet measured to move the first SSH login, kernel and command line only (no QEMU patch):
kernel/patches/0005back (each device's capability list walked once)kernel/patches/0006: vmlinux BTF parsed byasync_schedule()from a core_initcall instead of insideinet_init(11.2 of its 11.8 ms traced)CONFIG_DEFERRED_STRUCT_PAGE_INIT=y: the 2 GiB memmap initialised by kthreads after SMPdriver_async_probe=virtio_rng,virtio_balloon,vmw_vsock_virtio_transporton the machine's command lineHotplug (CPU, virtio-mem, balloon, disks) is untouched.
docs/log.mdgains the afternoon's entries, including the configuration-space snapshot that was measured and rejected (2-3 ms over 0005), andboot:initcallsgainsSPIN_EARLY=1, the early-boot timeline used to find the memmap.🤖 Generated with Claude Code