linux-toradex.git/Documentation/RCU, branch v2.6.19.2

[PATCH] rcu: add sched torture type to rcutorture

2006-10-04T14:55:31+00:00

Implement torture testing for the "sched" variant of RCU, which uses
preempt_disable, preempt_enable, and synchronize_sched.

Signed-off-by: Josh Triplett 
Acked-by: Paul E. McKenney 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] rcu: add rcu_bh_sync torture type to rcutorture

2006-10-04T14:55:31+00:00

Use the newly-generic synchronous deferred free function to implement torture
testing for rcu_bh using synchronize_rcu_bh rather than the asynchronous
call_rcu_bh.

Signed-off-by: Josh Triplett 
Acked-by: Paul E. McKenney 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] rcu: add rcu_sync torture type to rcutorture

2006-10-04T14:55:31+00:00

Use the newly-generic synchronous deferred free function to implement torture
testing for RCU using synchronize_rcu rather than the asynchronous call_rcu.

Signed-off-by: Josh Triplett 
Acked-by: Paul E. McKenney 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] RCU: add fake writers to rcutorture

2006-10-04T14:55:31+00:00

rcutorture currently has one writer and an arbitrary number of readers.  To
better exercise some of the code paths in RCU implementations, add fake
writer threads which call the synchronize function for the RCU variant in a
loop, with a delay between calls to arrange for different numbers of
writers running in parallel.

[bunk@stusta.de: cleanup]
Acked-by: Paul McKenney 
Cc: Dipkanar Sarma 
Signed-off-by: Josh Triplett 
Signed-off-by: Adrian Bunk 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] srcu-3: add SRCU operations to rcutorture

2006-10-04T14:55:30+00:00

Adds SRCU operations to rcutorture and updates rcutorture documentation.
Also increases the stress imposed by the rcutorture test.

[bunk@stusta.de: make needlessly global code static]
Signed-off-by: Paul E. McKenney 
Cc: Paul E. McKenney 
Signed-off-by: Adrian Bunk 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] srcu-3: RCU variant permitting read-side blocking

2006-10-04T14:55:30+00:00

Updated patch adding a variant of RCU that permits sleeping in read-side
critical sections.  SRCU is as follows:

o	Each use of SRCU creates its own srcu_struct, and each
	srcu_struct has its own set of grace periods.  This is
	critical, as it prevents one subsystem with a blocking
	reader from holding up SRCU grace periods for other
	subsystems.

o	The SRCU primitives (srcu_read_lock(), srcu_read_unlock(),
	and synchronize_srcu()) all take a pointer to a srcu_struct.

o	The SRCU primitives must be called from process context.

o	srcu_read_lock() returns an int that must be passed to
	the matching srcu_read_unlock().  Realtime RCU avoids the
	need for this by storing the state in the task struct,
	but SRCU needs to allow a given code path to pass through
	multiple SRCU domains -- storing state in the task struct
	would therefore require either arbitrary space in the
	task struct or arbitrary limits on SRCU nesting.  So I
	kicked the state-storage problem up to the caller.

	Of course, it is not permitted to call synchronize_srcu()
	while in an SRCU read-side critical section.

o	There is no call_srcu().  It would not be hard to implement
	one, but it seems like too easy a way to OOM the system.
	(Hey, we have enough trouble with call_rcu(), which does
	-not- permit readers to sleep!!!)  So, if you want it,
	please tell me why...

[josht@us.ibm.com: sparse notation]
Signed-off-by: Paul E. McKenney 
Signed-off-by: Josh Triplett 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Documentation: remove duplicated words

2006-10-03T20:57:56+00:00

Remove many duplicated words under Documentation/ and do other small
cleanups.

Examples:
        "and and" --> "and"
        "in in" --> "in"
        "the the" --> "the"
        "the the" --> "to the"
        ...

Signed-off-by: Paolo Ornati 
Signed-off-by: Adrian Bunk

Fix typos in Documentation/: 'S'

2006-10-03T20:55:17+00:00

This patch fixes typos in various Documentation txts. The patch addresses
some words starting with the letter 'S'.

Signed-off-by: Matt LaPlante 
Acked-by: Alan Cox 
Acked-by: Randy Dunlap 
Signed-off-by: Adrian Bunk

[PATCH] RCU Documentation fix

2006-07-10T20:24:15+00:00

Updater should use _rcu variant of list_del().

Signed-off-by: Urs Thuermann 
Acked-by: "Paul E. McKenney" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] rcutorture: add ops vector and Classic RCU ops

2006-06-28T00:32:40+00:00

Add an ops vector to rcutorture, and add the ops for Classic RCU.  Update
the rcutorture documentation to reflect slight change to the dmesg formats.

Signed-off-by: Paul E. McKenney 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds