Merge tag 'staging-3.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...

[~andy/linux] / drivers / md / persistent-data / Kconfig

diff --git a/drivers/md/persistent-data/Kconfig b/drivers/md/persistent-data/Kconfig
index 19b268795415b4a1eaf519001511275774a7f96e..0c2dec7aec20fd798d45b24d92156b3f85f4aae0 100644 (file)
--- a/drivers/md/persistent-data/Kconfig
+++ b/drivers/md/persistent-data/Kconfig
@@ -6,3 +6,13 @@ config DM_PERSISTENT_DATA
        ---help---
         Library providing immutable on-disk data structure support for
         device-mapper targets such as the thin provisioning target.
+
+config DM_DEBUG_BLOCK_STACK_TRACING
+       boolean "Keep stack trace of persistent data block lock holders"
+       depends on STACKTRACE_SUPPORT && DM_PERSISTENT_DATA
+       select STACKTRACE
+       ---help---
+        Enable this for messages that may help debug problems with the
+        block manager locking used by thin provisioning and caching.
+
+        If unsure, say N.