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Update Kconfig comments

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This commit is contained in:
Gregory Nutt 2016-03-21 18:28:43 -06:00
parent d20db82fcb
commit bc325bd597
1 changed files with 7 additions and 6 deletions
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13
sched/Kconfig
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@ -627,7 +627,7 @@ config SCHED_INSTRUMENTATION_PREEMPTION
config SCHED_INSTRUMENTATION_CSECTION
bool "Critical section monitor hooks"
default n
depends on EXPERIMENTAL
depends on EXPERIMENTAL || !SCHED_INSTRUMENTATION_BUFFER
---help---
Enables additional hooks for entry and exit from critical sections.
Interrupts are disabled while within a critical section. Board-
@ -636,11 +636,12 @@ config SCHED_INSTRUMENTATION_CSECTION
void sched_note_csection(FAR struct tcb_s *tcb, bool state);
NOTE: This option is marked EXPERIMENTAL because there is a logical
error in the design. That error is that sched_note_get() calls
enter/leave_critical_section. When the buffer note buffer has been
filled, each of these calls causes an entry to be removed from the
note buffer to make more space. The end result is that every other
note is lost when dumping the note buffer. Not very useful!
error in the design when this feature is used with
CONFIG_SCHED_INSTRUMENTATION_BUFFER. That error is that
sched_note_get() calls enter_ and leave_critical_section. That
means that each call to sched_note_get() causes two entries to be
added from the note buffer in order to remove one entry. Not
very useful in its current state!
config SCHED_INSTRUMENTATION_BUFFER
bool "Buffer instrumentation data in memory"