[PATCH] ww-mutex: clarify help text for DEBUG_WW_MUTEX_SLOWPATH
maarten.lankhorst at canonical.com
Wed Aug 27 08:27:23 PDT 2014
Acked-by: Maarten Lankhorst <maarten.lankhorst at canonical.com>
On 27-08-14 17:19, Rob Clark wrote:
> We really don't want distro's enabling this in their kernels. Try and
> make that more clear.
> Signed-off-by: Rob Clark <robdclark at gmail.com>
> 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.
> config DEBUG_LOCK_ALLOC
> bool "Lock debugging: detect incorrect freeing of live locks"
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