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444da518fd
Deferred quiescent states can interact with the scheduler, but rcu_torture_reader() does not force such interaction all that frequently. This commit therefore blocks for one jiffy after ten jiffies of read-side runtime. This has the beneficial effect of being most likely to block just after long-running readers, and it is exactly these readers that are most likely to have been preempted (in CONFIG_PREEMPT=y kernels). This in turn helps increase the probability that a deferred quiescent state will be seen by RCU's context-switch hooks. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> |
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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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.