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rcu: Remove nohz_full full-system-idle state machine

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The NO_HZ_FULL_SYSIDLE full-system-idle capability was added in 2013
by commit 0edd1b1784 ("nohz_full: Add full-system-idle state machine"),
but has not been used.  This commit therefore removes it.

If it turns out to be needed later, this commit can always be reverted.

Signed-off-by: Paul E. McKenney <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Ingo Molnar <[email protected]>
Acked-by: Linus Torvalds <[email protected]>
This commit is contained in:
Paul E. McKenney 2017-05-11 11:26:22 -07:00
commit fe5ac724d8
9 changed files with 9 additions and 551 deletions
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1
tools/testing/selftests/rcutorture/configs/rcu/TREE07
View file

@ -8,7 +8,6 @@ CONFIG_HZ_PERIODIC=n
CONFIG_NO_HZ_IDLE=n
CONFIG_NO_HZ_FULL=y
CONFIG_NO_HZ_FULL_ALL=n
CONFIG_NO_HZ_FULL_SYSIDLE=y
CONFIG_RCU_FAST_NO_HZ=n
CONFIG_RCU_TRACE=y
CONFIG_HOTPLUG_CPU=y

1
tools/testing/selftests/rcutorture/doc/TINY_RCU.txt
View file

@ -18,7 +18,6 @@ CONFIG_PROVE_RCU
In common code tested by TREE_RCU test cases.
CONFIG_NO_HZ_FULL_SYSIDLE
CONFIG_RCU_NOCB_CPU
Meaningless for TINY_RCU.

7
tools/testing/selftests/rcutorture/doc/TREE_RCU-kconfig.txt
View file

@ -9,8 +9,7 @@ CONFIG_DEBUG_OBJECTS_RCU_HEAD -- Do one.
CONFIG_HOTPLUG_CPU -- Do half. (Every second.)
CONFIG_HZ_PERIODIC -- Do one.
CONFIG_NO_HZ_IDLE -- Do those not otherwise specified. (Groups of two.)
CONFIG_NO_HZ_FULL -- Do two, one with CONFIG_NO_HZ_FULL_SYSIDLE.
CONFIG_NO_HZ_FULL_SYSIDLE -- Do one.
CONFIG_NO_HZ_FULL -- Do two, one with partial CPU enablement.
CONFIG_PREEMPT -- Do half. (First three and #8.)
CONFIG_PROVE_LOCKING -- Do several, covering CONFIG_DEBUG_LOCK_ALLOC=y and not.
CONFIG_PROVE_RCU -- Hardwired to CONFIG_PROVE_LOCKING.
@ -48,10 +47,6 @@ CONFIG_64BIT
Used only to check CONFIG_RCU_FANOUT value, inspection suffices.
CONFIG_NO_HZ_FULL_SYSIDLE_SMALL
Defer until Frederic uses this.
CONFIG_PREEMPT_COUNT
CONFIG_PREEMPT_RCU