Upgrade Your Kernel Without Rebooting
Apply kernel security patches and updates without downtime. Boot the new kernel alongside the old one, migrate workloads, and roll back instantly if anything goes wrong. No maintenance windows required. Available standalone as a per-node subscription: adopt it without changing the rest of your stack.
Zero-Downtime Kernel Upgrades
Kernel upgrades are one of the most painful operations in production Linux. Teams delay security patches for weeks because they require reboots. Livepatching services work around it by patching individual functions in place. LiveUpdate replaces the entire kernel, and the old one keeps running until you commit.
Boot New Alongside Old
Launch the new kernel alongside the running one. Both kernels operate simultaneously on separate cores. No downtime window to schedule.
Migrate Workloads
Move applications from the old kernel to the new one gradually. Validate each migration before proceeding. Keep full control over the transition.
Instant Rollback
If something goes wrong, roll back instantly. The old kernel is still running. No reboot, no recovery procedure, no data loss.
Surviving Kernel Crashes
A kernel crash today means a full reboot, minutes of downtime, and every cache starting cold. With Multikernel, a crash stays inside one kernel, and its memory outlives it.
An app-kernel panicked mid-write four times. Each time, its memory on DAXFS was intact down to a half-written page, and the rest of the machine kept running. Recovery was a kernel boot, with no log to replay.
Crash recoveryCrash Containment
A panic in one kernel stays in that kernel. Workloads in the other kernels keep running, with no machine reboot.
Warm Restart
The crashed workload restarts on a fresh kernel and maps its DAXFS memory back, so caches and indexes do not rebuild from cold.
Benefits
Ship Security Patches Faster
Kernel updates no longer wait for reboot windows. Apply patches immediately with zero application downtime.
Contain Kernel Failures
A crash in one kernel stays in that kernel. Other workloads keep running, and the crashed workload restarts with its memory intact instead of rebuilding from cold.
Reduce Operator Burden
Eliminates scheduled maintenance windows for kernel updates. Upgrades, validation, and rollback happen while workloads keep running.
How to Get It
Multikernel LiveUpdate is open-source software you install on your own infrastructure. Free to download and build; the enterprise subscription is priced per node per year and buyable standalone.
Open Source
Download and build from source. Perform zero-downtime kernel upgrades on any multikernel-enabled system. Community support via GitHub issues.
Enterprise
A standalone per-node annual subscription for production environments where downtime is not an option.