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282e06cc8f
This commit adds rcutorture module parameters gp_cond_wi, gp_cond_wi_exp, gp_poll_wi, and gp_poll_wi_exp to control the wait interval for conditional, conditional expedited, polled, and polled expedited grace periods, respectively. When rcu_torture_writer() is testing these types of grace periods, hrtimers are used to randomly wait up to the specified number of microseconds, but with nanosecond granularity. In the case of conditional grace periods (get_state_synchronize_rcu() and cond_synchronize_rcu(), for example) there is just one wait. For polled grace periods (start_poll_synchronize_rcu() and poll_state_synchronize_rcu(), for example), there is a repeated series of waits until the grace period ends. For normal grace periods, the default is 16 jiffies (for example, 16,000 microseconds on a HZ=1000 system) and for expedited grace periods the default is 128 microseconds. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.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 reStructuredText 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.