mirror of
https://github.com/hardkernel/linux.git
synced 2026-06-04 02:02:28 +09:00
6991436c2b
RT enabled kernels substitute spin/rwlocks with 'sleeping' variants based on rtmutexes. Blocking on such a lock is similar to preemption versus: - I/O scheduling and worker handling, because these functions might block on another substituted lock, or come from a lock contention within these functions. - RCU considers this like a preemption, because the task might be in a read side critical section. Add a separate scheduling point for this, and hand a new scheduling mode argument to __schedule() which allows, along with separate mode masks, to handle this gracefully from within the scheduler, without proliferating that to other subsystems like RCU. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20210815211302.372319055@linutronix.de
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.