From: Fedora Kernel Team <kernel-team@xxxxxxxxxxxxxxxxx>
Hi,
As part of the ongoing rebase effort, the following configuration
options need to be reviewed.
As a reminder, the ARK configuration flow involves moving unreviewed
configuration options from the pending directory to the ark directory.
In the diff below, options are removed from the pending directory and
added to the ark hierarchy. The final options that need to be ACKed
are the files that are being added to the ark hierarchy.
If the value for a file that is added should be changed, please reply
with a better option.
CONFIG_FTRACE_RECORD_RECURSION:
All callbacks that attach to the function tracing have some sort
of protection against recursion. Even though the protection exists,
it adds overhead. This option will create a file in the tracefs
file system called "recursed_functions" that will list the functions
that triggered a recursion.
This will add more overhead to cases that have recursion.
If unsure, say N
Symbol: FTRACE_RECORD_RECURSION [=n]
Type : bool
Defined at kernel/trace/Kconfig:737
Prompt: Record functions that recurse in function tracing
Depends on: TRACING_SUPPORT [=y] && FTRACE [=y] && FUNCTION_TRACER [=y]
Location:
-> Kernel hacking
-> Tracers (FTRACE [=y])
---
CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS:
This will audit the time stamps on the ring buffer sub
buffer to make sure that all the time deltas for the
events on a sub buffer matches the current time stamp.
This audit is performed for every event that is not
interrupted, or interrupting another event. A check
is also made when traversing sub buffers to make sure
that all the deltas on the previous sub buffer do not
add up to be greater than the current time stamp.
NOTE: This adds significant overhead to recording of events,
and should only be used to test the logic of the ring buffer.
Do not use it on production systems.
Only say Y if you understand what this does, and you
still want it enabled. Otherwise say N
Symbol: RING_BUFFER_VALIDATE_TIME_DELTAS [=n]
Type : bool
Defined at kernel/trace/Kconfig:846
Prompt: Verify ring buffer time stamp deltas
Depends on: TRACING_SUPPORT [=y] && FTRACE [=y] && RING_BUFFER [=y]
Location:
-> Kernel hacking
-> Tracers (FTRACE [=y])
---
Cc: Jerome Marchand <jmarchan@xxxxxxxxxx>
Signed-off-by: Fedora Kernel Team <kernel-team@xxxxxxxxxxxxxxxxx>
---
.../generic/CONFIG_FTRACE_RECORD_RECURSION | 1 +
.../CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS | 1 +
.../generic/CONFIG_FTRACE_RECORD_RECURSION | 24 ---------------
.../CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS | 30 -------------------
4 files changed, 2 insertions(+), 54 deletions(-)
create mode 100644 redhat/configs/common/generic/CONFIG_FTRACE_RECORD_RECURSION
create mode 100644 redhat/configs/common/generic/CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS
delete mode 100644 redhat/configs/pending-common/generic/CONFIG_FTRACE_RECORD_RECURSION
delete mode 100644 redhat/configs/pending-common/generic/CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS
diff --git a/redhat/configs/common/generic/CONFIG_FTRACE_RECORD_RECURSION b/redhat/configs/common/generic/CONFIG_FTRACE_RECORD_RECURSION
new file mode 100644
index 000000000000..613dd9d01aef
--- /dev/null
+++ b/redhat/configs/common/generic/CONFIG_FTRACE_RECORD_RECURSION
@@ -0,0 +1 @@
+# CONFIG_FTRACE_RECORD_RECURSION is not set
diff --git a/redhat/configs/common/generic/CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS b/redhat/configs/common/generic/CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS
new file mode 100644
index 000000000000..062dee43468f
--- /dev/null
+++ b/redhat/configs/common/generic/CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS
@@ -0,0 +1 @@
+# CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS is not set
diff --git a/redhat/configs/pending-common/generic/CONFIG_FTRACE_RECORD_RECURSION b/redhat/configs/pending-common/generic/CONFIG_FTRACE_RECORD_RECURSION
deleted file mode 100644
index d4b4d5a8a0da..000000000000
--- a/redhat/configs/pending-common/generic/CONFIG_FTRACE_RECORD_RECURSION
+++ /dev/null
@@ -1,24 +0,0 @@
-# CONFIG_FTRACE_RECORD_RECURSION:
-#
-# All callbacks that attach to the function tracing have some sort
-# of protection against recursion. Even though the protection exists,
-# it adds overhead. This option will create a file in the tracefs
-# file system called "recursed_functions" that will list the functions
-# that triggered a recursion.
-#
-# This will add more overhead to cases that have recursion.
-#
-# If unsure, say N
-#
-# Symbol: FTRACE_RECORD_RECURSION [=n]
-# Type : bool
-# Defined at kernel/trace/Kconfig:737
-# Prompt: Record functions that recurse in function tracing
-# Depends on: TRACING_SUPPORT [=y] && FTRACE [=y] && FUNCTION_TRACER [=y]
-# Location:
-# -> Kernel hacking
-# -> Tracers (FTRACE [=y])
-#
-#
-#
-# CONFIG_FTRACE_RECORD_RECURSION is not set
diff --git a/redhat/configs/pending-common/generic/CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS b/redhat/configs/pending-common/generic/CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS
deleted file mode 100644
index 383636599d30..000000000000
--- a/redhat/configs/pending-common/generic/CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS
+++ /dev/null
@@ -1,30 +0,0 @@
-# CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS:
-#
-# This will audit the time stamps on the ring buffer sub
-# buffer to make sure that all the time deltas for the
-# events on a sub buffer matches the current time stamp.
-# This audit is performed for every event that is not
-# interrupted, or interrupting another event. A check
-# is also made when traversing sub buffers to make sure
-# that all the deltas on the previous sub buffer do not
-# add up to be greater than the current time stamp.
-#
-# NOTE: This adds significant overhead to recording of events,
-# and should only be used to test the logic of the ring buffer.
-# Do not use it on production systems.
-#
-# Only say Y if you understand what this does, and you
-# still want it enabled. Otherwise say N
-#
-# Symbol: RING_BUFFER_VALIDATE_TIME_DELTAS [=n]
-# Type : bool
-# Defined at kernel/trace/Kconfig:846
-# Prompt: Verify ring buffer time stamp deltas
-# Depends on: TRACING_SUPPORT [=y] && FTRACE [=y] && RING_BUFFER [=y]
-# Location:
-# -> Kernel hacking
-# -> Tracers (FTRACE [=y])
-#
-#
-#
-# CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS is not set
--
GitLab
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