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Author SHA1 Message Date
NeilBrown
7c0be9f890 doc: Add refcount analogy to What is RCU 
The reader-writer-lock analogy is a useful way to think about RCU, but
it is not always applicable.  It is useful to have other analogies to
work with, and particularly to emphasise that no single analogy is
perfect.

This patch add a "RCU as reference count" to the "what is RCU" document.

See https://lwn.net/Articles/872559/

[ paulmck: Apply Akira Yokosawa feedback. ]
Reviewed-by: Akira Yokosawa <akiyks@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
 2021-11-30 17:23:06 -08:00
Sebastian Andrzej Siewior
81ad58be2f doc: Use CONFIG_PREEMPTION 
CONFIG_PREEMPTION is selected by CONFIG_PREEMPT and by CONFIG_PREEMPT_RT.
Both PREEMPT and PREEMPT_RT require the same functionality which today
depends on CONFIG_PREEMPT.

Update the documents and mention CONFIG_PREEMPTION. Spell out
CONFIG_PREEMPT_RT (instead PREEMPT_RT) since it is an option now.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
 2021-01-06 16:10:44 -08:00
Hui Su
c386e29d43 docs/rcu: Update the call_rcu() API 
This commit updates the documented API of call_rcu() to use the
rcu_callback_t typedef instead of the open-coded function definition.

Signed-off-by: Hui Su <sh_def@163.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
 2020-11-06 17:02:43 -08:00
Tobias Klauser
77f808607a docs: Fix typo in synchronize_rcu() function name 
s/sychronize_rcu/synchronize_rcu/

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
 2020-08-24 14:29:16 -07:00
Madhuparna Bhowmik
17f0da1387 doc: Updated full list of RCU API in whatisRCU.rst 
This patch updates the list of RCU API in whatisRCU.rst.

Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik04@gmail.com>
Tested-by: Amol Grover <frextrite@gmail.com>
Tested-by: Phong Tran <tranmanphong@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
 2019-12-10 18:51:54 -08:00
Phong Tran
5e1bc93281 doc: Convert whatisRCU.txt to .rst 
This commit updates whatisRCU.txt to the new .rst format.
This change includes:

- Formatting bullet lists
- Adding literal blocks
- Links from table of contents to corresponding sections
- Links to external documents
- Reformat quick quizzes

Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Tested-by: Madhuparna Bhowmik <madhuparnabhowmik04@gmail.com>
[ tranmanphong: Apply Amol Grover feedback. ]
Reviewed-by: Amol Grover <frextrite@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
 2019-12-10 18:51:53 -08:00