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![]() Posix timer delete retry loops are affected by the same priority inversion and live lock issues as the other timers. Provide a RT specific synchronization function which keeps a reference to the timer by holding rcu read lock to prevent the timer from being freed, dropping the timer lock and invoking the timer specific wait function via a new callback. This does not yet cover posix CPU timers because they need more special treatment on PREEMPT_RT. [ This is folded into the original attempt which did not use a callback. ] Originally-by: Anna-Maria Gleixenr <anna-maria@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Link: https://lkml.kernel.org/r/20190819143801.656864506@linutronix.de |
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README |
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.