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author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-21 12:54:12 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-21 12:54:12 -0700 |
commit | 888a6f77e0418b049f83d37547c209b904d30af4 (patch) | |
tree | 42cdb9f781d2177e6b380e69a66a27ec7705f51f /lib/Kconfig.debug | |
parent | 31b7eab27a314b153d8fa07ba9e9ec00a98141e1 (diff) | |
parent | 6506cf6ce68d78a5470a8360c965dafe8e4b78e3 (diff) |
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (52 commits)
sched: fix RCU lockdep splat from task_group()
rcu: using ACCESS_ONCE() to observe the jiffies_stall/rnp->qsmask value
sched: suppress RCU lockdep splat in task_fork_fair
net: suppress RCU lockdep false positive in sock_update_classid
rcu: move check from rcu_dereference_bh to rcu_read_lock_bh_held
rcu: Add advice to PROVE_RCU_REPEATEDLY kernel config parameter
rcu: Add tracing data to support queueing models
rcu: fix sparse errors in rcutorture.c
rcu: only one evaluation of arg in rcu_dereference_check() unless sparse
kernel: Remove undead ifdef CONFIG_DEBUG_LOCK_ALLOC
rcu: fix _oddness handling of verbose stall warnings
rcu: performance fixes to TINY_PREEMPT_RCU callback checking
rcu: upgrade stallwarn.txt documentation for CPU-bound RT processes
vhost: add __rcu annotations
rcu: add comment stating that list_empty() applies to RCU-protected lists
rcu: apply TINY_PREEMPT_RCU read-side speedup to TREE_PREEMPT_RCU
rcu: combine duplicate code, courtesy of CONFIG_PREEMPT_RCU
rcu: Upgrade srcu_read_lock() docbook about SRCU grace periods
rcu: document ways of stalling updates in low-memory situations
rcu: repair code-duplication FIXMEs
...
Diffstat (limited to 'lib/Kconfig.debug')
-rw-r--r-- | lib/Kconfig.debug | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 1b4afd2e6ca..9886cf5365b 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -539,6 +539,23 @@ config PROVE_RCU_REPEATEDLY disabling, allowing multiple RCU-lockdep warnings to be printed on a single reboot. + Say Y to allow multiple RCU-lockdep warnings per boot. + + Say N if you are unsure. + +config SPARSE_RCU_POINTER + bool "RCU debugging: sparse-based checks for pointer usage" + default n + help + This feature enables the __rcu sparse annotation for + RCU-protected pointers. This annotation will cause sparse + to flag any non-RCU used of annotated pointers. This can be + helpful when debugging RCU usage. Please note that this feature + is not intended to enforce code cleanliness; it is instead merely + a debugging aid. + + Say Y to make sparse flag questionable use of RCU-protected pointers + Say N if you are unsure. config LOCKDEP @@ -832,6 +849,30 @@ config RCU_CPU_STALL_DETECTOR Say Y if you are unsure. +config RCU_CPU_STALL_TIMEOUT + int "RCU CPU stall timeout in seconds" + depends on RCU_CPU_STALL_DETECTOR + range 3 300 + default 60 + help + If a given RCU grace period extends more than the specified + number of seconds, a CPU stall warning is printed. If the + RCU grace period persists, additional CPU stall warnings are + printed at more widely spaced intervals. + +config RCU_CPU_STALL_DETECTOR_RUNNABLE + bool "RCU CPU stall checking starts automatically at boot" + depends on RCU_CPU_STALL_DETECTOR + default y + help + If set, start checking for RCU CPU stalls immediately on + boot. Otherwise, RCU CPU stall checking must be manually + enabled. + + Say Y if you are unsure. + + Say N if you wish to suppress RCU CPU stall checking during boot. + config RCU_CPU_STALL_VERBOSE bool "Print additional per-task information for RCU_CPU_STALL_DETECTOR" depends on RCU_CPU_STALL_DETECTOR && TREE_PREEMPT_RCU |