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rcu: Remove CONFIG_PROVE_RCU_DELAY

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The CONFIG_PROVE_RCU_DELAY Kconfig parameter doesn't appear to be very
effective at finding race conditions, so this commit removes it.

Signed-off-by: Paul E. McKenney <[email protected]>
Cc: Andi Kleen <[email protected]>
[ paulmck: Remove definition and uses as noted by Paul Bolle. ]
This commit is contained in:
Paul E. McKenney 2014-06-23 12:09:52 -07:00
commit 11992c703a
19 changed files with 0 additions and 38 deletions
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14
lib/Kconfig.debug
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@ -1131,20 +1131,6 @@ config PROVE_RCU_REPEATEDLY
Say N if you are unsure.
config PROVE_RCU_DELAY
bool "RCU debugging: preemptible RCU race provocation"
depends on DEBUG_KERNEL && PREEMPT_RCU
default n
help
There is a class of races that involve an unlikely preemption
of __rcu_read_unlock() just after ->rcu_read_lock_nesting has
been set to INT_MIN. This feature inserts a delay at that
point to increase the probability of these races.
Say Y to increase probability of preemption of __rcu_read_unlock().
Say N if you are unsure.
config SPARSE_RCU_POINTER
bool "RCU debugging: sparse-based checks for pointer usage"
default n