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authorJeff Dike <jdike@addtoit.com>2007-07-15 23:38:48 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-16 09:05:38 -0700
commite18eecb8b35703a5eea73ee2b45324262029e62c (patch)
tree8c276ae6633b8116ca366274091b00491fd50bbe /arch/um
parent84812217e395f5272eac36856c0a2415d61fe139 (diff)
downloadop-kernel-dev-e18eecb8b35703a5eea73ee2b45324262029e62c.zip
op-kernel-dev-e18eecb8b35703a5eea73ee2b45324262029e62c.tar.gz
Add generic exit-time stack-depth checking to CONFIG_DEBUG_STACK_USAGE
Add generic exit-time stack-depth checking to CONFIG_DEBUG_STACK_USAGE. This also adds UML support. Tested on UML and i386. [akpm@linux-foundation.org: cleanups, speedups, tweaks] Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um')
-rw-r--r--arch/um/Kconfig.debug9
-rw-r--r--arch/um/defconfig1
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/um/Kconfig.debug b/arch/um/Kconfig.debug
index 09c1aca..c86f5eb2 100644
--- a/arch/um/Kconfig.debug
+++ b/arch/um/Kconfig.debug
@@ -47,4 +47,13 @@ config GCOV
If you're involved in UML kernel development and want to use gcov,
say Y. If you're unsure, say N.
+config DEBUG_STACK_USAGE
+ bool "Stack utilization instrumentation"
+ default N
+ help
+ Track the maximum kernel stack usage - this will look at each
+ kernel stack at process exit and log it if it's the deepest
+ stack seen so far.
+
+ This option will slow down process creation and destruction somewhat.
endmenu
diff --git a/arch/um/defconfig b/arch/um/defconfig
index a54d0ef..e5b2df9 100644
--- a/arch/um/defconfig
+++ b/arch/um/defconfig
@@ -527,3 +527,4 @@ CONFIG_FORCED_INLINING=y
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_GPROF is not set
# CONFIG_GCOV is not set
+# CONFIG_DEBUG_STACK_USAGE is not set
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