mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 04:02:20 +00:00
doc: Fix RCU requirements typos
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
This commit is contained in:
parent
e73c14ebc3
commit
526914a0ae
@ -1480,7 +1480,7 @@ speed-of-light delays if nothing else.
|
||||
|
||||
<p>
|
||||
Furthermore, uncertainty about external state is inherent in many cases.
|
||||
For example, a pair of veternarians might use heartbeat to determine
|
||||
For example, a pair of veterinarians might use heartbeat to determine
|
||||
whether or not a given cat was alive.
|
||||
But how long should they wait after the last heartbeat to decide that
|
||||
the cat is in fact dead?
|
||||
@ -1489,9 +1489,9 @@ mean that a relaxed cat would be considered to cycle between death
|
||||
and life more than 100 times per minute.
|
||||
Moreover, just as with human beings, a cat's heart might stop for
|
||||
some period of time, so the exact wait period is a judgment call.
|
||||
One of our pair of veternarians might wait 30 seconds before pronouncing
|
||||
One of our pair of veterinarians might wait 30 seconds before pronouncing
|
||||
the cat dead, while the other might insist on waiting a full minute.
|
||||
The two veternarians would then disagree on the state of the cat during
|
||||
The two veterinarians would then disagree on the state of the cat during
|
||||
the final 30 seconds of the minute following the last heartbeat.
|
||||
|
||||
<p>
|
||||
@ -1945,7 +1945,7 @@ guard against mishaps and misuse:
|
||||
<ol>
|
||||
<li> It is all too easy to forget to use <tt>rcu_read_lock()</tt>
|
||||
everywhere that it is needed, so kernels built with
|
||||
<tt>CONFIG_PROVE_RCU=y</tt> will spat if
|
||||
<tt>CONFIG_PROVE_RCU=y</tt> will splat if
|
||||
<tt>rcu_dereference()</tt> is used outside of an
|
||||
RCU read-side critical section.
|
||||
Update-side code can use <tt>rcu_dereference_protected()</tt>,
|
||||
@ -2421,7 +2421,7 @@ However, there are some restrictions on the code placed within
|
||||
<li> Blocking is prohibited.
|
||||
In practice, this is not a serious restriction given that idle
|
||||
tasks are prohibited from blocking to begin with.
|
||||
<li> Although nesting <tt>RCU_NONIDLE()</tt> is permited, they cannot
|
||||
<li> Although nesting <tt>RCU_NONIDLE()</tt> is permitted, they cannot
|
||||
nest indefinitely deeply.
|
||||
However, given that they can be nested on the order of a million
|
||||
deep, even on 32-bit systems, this should not be a serious
|
||||
@ -2885,7 +2885,7 @@ APIs for defining and initializing <tt>srcu_struct</tt> structures.
|
||||
<h3><a name="Tasks RCU">Tasks RCU</a></h3>
|
||||
|
||||
<p>
|
||||
Some forms of tracing use “tramopolines” to handle the
|
||||
Some forms of tracing use “trampolines” to handle the
|
||||
binary rewriting required to install different types of probes.
|
||||
It would be good to be able to free old trampolines, which sounds
|
||||
like a job for some form of RCU.
|
||||
|
Loading…
Reference in New Issue
Block a user