[PATCH] ww-mutex: clarify help text for DEBUG_WW_MUTEX_SLOWPATH

From: Rob Clark
Date: Wed Aug 27 2014 - 11:19:38 EST

We really don't want distro's enabling this in their kernels. Try and
make that more clear.

Signed-off-by: Rob Clark <robdclark@xxxxxxxxx>
lib/Kconfig.debug | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 07c2832..1b233fc 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -892,6 +892,10 @@ config DEBUG_WW_MUTEX_SLOWPATH
the full mutex checks enabled with (CONFIG_PROVE_LOCKING) this
will test all possible w/w mutex interface abuse with the
exception of simply not acquiring all the required locks.
+ Note that this feature can introduce significant overhead, so
+ it really should not be enabled in a production or distro kernel,
+ even a debug kernel. If you are a driver writer, enable it. If
+ you are a distro, do not.

bool "Lock debugging: detect incorrect freeing of live locks"

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/