kernel/linux.git/Documentation/core-api/real-time, branch v7.0-rc7

Documentation: update config name in real-time architecture support

2025-12-22T22:33:40+00:00

Commit 4843a45ef9fe8 ("entry: Rename "kvm" entry code assets to "virt" to genericize APIs") renames the config KVM_XFER_TO_GUEST_WORK to VIRT_XFER_TO_GUEST_WORK. Adjust the documentation to the current situation, and specifically refer to the new name of the config. Signed-off-by: Lukas Bulwahn Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Jonathan Corbet Message-ID: <20251127154343.292156-3-bigeasy@linutronix.de>

Documentation: Add some hardware hints for real-time

2025-12-22T22:33:40+00:00

Some thoughts on hardware that is used for real-time workload. Certainly not complete but should cover some of the import topics such as: - Main memory, caches and the possiblie control given by the hardware. - What could happen by putting critical hardware behind USB or VirtIO. - Allowing real-time tasks to consume the CPU entirely without giving the system some time to breath. - Networking with what the kernel provides. Reviewed-by: Steven Rostedt (Google) Reviewed-by: Randy Dunlap Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Jonathan Corbet Message-ID: <20251127154343.292156-2-bigeasy@linutronix.de>

Documentation: Add real-time to core-api

2025-08-21T20:06:08+00:00

The documents explain the design concepts behind PREEMPT_RT and highlight key differences necessary to achieve it. It also include a list of requirements that must be fulfilled to support PREEMPT_RT on a given architecture. Signed-off-by: Sebastian Andrzej Siewior [jc: tweaked "how they differ" section head] Signed-off-by: Jonathan Corbet Link: https://lore.kernel.org/r/20250815093858.930751-4-bigeasy@linutronix.de