linux-kernel - [PATCH 2/3] lockdep: clarify size for LOCKDEP_*

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Message-ID: <20240806010128.402852-3-cmllamas@google.com>
Date: Tue,  6 Aug 2024 01:01:25 +0000
From: Carlos Llamas <cmllamas@...gle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, kernel-team@...roid.com, 
	Carlos Llamas <cmllamas@...gle.com>, Peter Zijlstra <peterz@...radead.org>, 
	Boqun Feng <boqun.feng@...il.com>, Ingo Molnar <mingo@...hat.com>, 
	Waiman Long <longman@...hat.com>, Will Deacon <will@...nel.org>
Subject: [PATCH 2/3] lockdep: clarify size for LOCKDEP_*_BITS configs

The LOCKDEP_*_BITS configs control the size of internal structures used
by lockdep. The size is calculated as a power of two of the configured
value (e.g. 16 => 64KB). Update these descriptions to more accurately
reflect this, as "Bitsize" can be misleading.

Suggested-by: Andrew Morton <akpm@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Boqun Feng <boqun.feng@...il.com>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Waiman Long <longman@...hat.com>
Cc: Will Deacon <will@...nel.org>
Signed-off-by: Carlos Llamas <cmllamas@...gle.com>
---
 lib/Kconfig.debug | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index baaaedfde0cb..e0614a415348 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1505,7 +1505,7 @@ config LOCKDEP_SMALL
 	bool
 
 config LOCKDEP_BITS
-	int "Bitsize for MAX_LOCKDEP_ENTRIES"
+	int "Size for MAX_LOCKDEP_ENTRIES (as Nth power of 2)"
 	depends on LOCKDEP && !LOCKDEP_SMALL
 	range 10 24
 	default 15
@@ -1513,7 +1513,7 @@ config LOCKDEP_BITS
 	  Try increasing this value if you hit "BUG: MAX_LOCKDEP_ENTRIES too low!" message.
 
 config LOCKDEP_CHAINS_BITS
-	int "Bitsize for MAX_LOCKDEP_CHAINS"
+	int "Size for MAX_LOCKDEP_CHAINS (as Nth power of 2)"
 	depends on LOCKDEP && !LOCKDEP_SMALL
 	range 10 21
 	default 16
@@ -1521,7 +1521,7 @@ config LOCKDEP_CHAINS_BITS
 	  Try increasing this value if you hit "BUG: MAX_LOCKDEP_CHAINS too low!" message.
 
 config LOCKDEP_STACK_TRACE_BITS
-	int "Bitsize for MAX_STACK_TRACE_ENTRIES"
+	int "Size for MAX_STACK_TRACE_ENTRIES (as Nth power of 2)"
 	depends on LOCKDEP && !LOCKDEP_SMALL
 	range 10 26
 	default 19
@@ -1529,7 +1529,7 @@ config LOCKDEP_STACK_TRACE_BITS
 	  Try increasing this value if you hit "BUG: MAX_STACK_TRACE_ENTRIES too low!" message.
 
 config LOCKDEP_STACK_TRACE_HASH_BITS
-	int "Bitsize for STACK_TRACE_HASH_SIZE"
+	int "Size for STACK_TRACE_HASH_SIZE (as Nth power of 2)"
 	depends on LOCKDEP && !LOCKDEP_SMALL
 	range 10 26
 	default 14
@@ -1537,7 +1537,7 @@ config LOCKDEP_STACK_TRACE_HASH_BITS
 	  Try increasing this value if you need large STACK_TRACE_HASH_SIZE.
 
 config LOCKDEP_CIRCULAR_QUEUE_BITS
-	int "Bitsize for elements in circular_queue struct"
+	int "Size for elements in circular_queue struct (as Nth power of 2)"
 	depends on LOCKDEP
 	range 10 26
 	default 12
-- 
2.46.0.rc2.264.g509ed76dc8-goog