path: root/lib
diff options
authorMichel Lespinasse <walken@google.com>2012-10-08 16:31:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-09 16:22:42 +0900
commited8ea8150182f8d715fceb3b175ef0a9ebacd872 (patch)
tree3af48f3a947df4dc5a0df660988f61d454a88cf2 /lib
parent86c2ad19956f84f2191e062fcb979367b6365871 (diff)
mm: add CONFIG_DEBUG_VM_RB build option
Add a CONFIG_DEBUG_VM_RB build option for the previously existing DEBUG_MM_RB code. Now that Andi Kleen modified it to avoid using recursive algorithms, we can expose it a bit more. Also extend this code to validate_mm() after stack expansion, and to check that the vma's start and last pgoffs have not changed since the nodes were inserted on the anon vma interval tree (as it is important that the nodes be reindexed after each such update). Signed-off-by: Michel Lespinasse <walken@google.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Daniel Santos <daniel.santos@pobox.com> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index a6e7e774152..28e9d6c9894 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -798,6 +798,15 @@ config DEBUG_VM
If unsure, say N.
+config DEBUG_VM_RB
+ bool "Debug VM red-black trees"
+ depends on DEBUG_VM
+ help
+ Enable this to turn on more extended checks in the virtual-memory
+ system that may impact performance.
+ If unsure, say N.
bool "Debug VM translations"
depends on DEBUG_KERNEL && X86