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KVM is a Linux kernel module enabling the kernel to act as a hypervisor, letting the host run virtual machines via the /dev/kvm interface.
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DigitalOcean Managed Agents brought a paused process back with its in-memory counter intact after more than four minutes, in one developer's independent test. That puts the preview service in a different class from ordinary containers for parking long-lived agents mid-task.
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Linus Torvalds said selftests make up a quarter of the Linux 7.3-rc5 patch by line count, a split he called unusual. A few very large test patches produce that share, so the size of the rc alone gives teams planning for 7.3 little reason to wait.
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The three escapes used a kernel bug disclosed weeks earlier, a libslirp flaw Debian 12 has yet to fix, and 0-days the agent found itself after QEMU was rebuilt from upstream. It is one researcher's account.
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Hyunwoo Kim says a guest can use the bug to run code on the host, and he reports a local-root variant where /dev/kvm is world-openable. Both need ARM64 nested virtualization, a mode that is off by default.
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A dev.to walkthrough for Linux guests on KVM splits a VDS benchmark into three separate measurements, records the environment before anything runs, and treats steal time as a correlation to test against throughput across repeated runs.
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Firecracker's sub-200ms boot is real, but it only counts on a host you are already paying for by the hour, which is why an experimental GitHub Actions runner project stands or falls on its author's scheduler.
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Steal at 32.73% with no idle left means the guest had runnable work and no physical core to run it on. That is the one failure mode neither profiling the backend nor buying a bigger plan can reach.
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In a dev.to writeup, the steal column stayed above 90% after the author moved his workload off the box and cut production traffic, which is the measurement that separates an overloaded app from an oversubscribed host.
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The dual-ISA core runs AArch64 and z/Architecture on the same core with nanosecond switching. x86 is named in the pitch and absent from the silicon, and the uptime arithmetic does not close.
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Encore's crackling drives Firecracker on Linux and Apple's hypervisor on macOS. Getting one set of images to boot on both meant re-implementing much of what Docker and a Linux host do for free.
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Docker VMM replaces the per-platform virtualization under Docker Desktop with one in-house backend. It is beta in v4.86 on Windows and macOS; Linux waits for October's general availability.
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Cuttlefish will not start on Minisforum's CIX P1 desktop because the vendor kernel strips the whole vhost subsystem. The rebuild is not optional, and it is not just a Cuttlefish problem.
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