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ww-mutex: clarify help text for DEBUG_WW_MUTEX_SLOWPATH

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

Signed-off-by: Rob Clark <robdclark@gmail.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Rob Clark 2014-08-27 11:19:26 -04:00 • committed by Dave Airlie
parent a80612273c
commit 4d6923733f
1 changed files with 4 additions and 0 deletions
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4
lib/Kconfig.debug
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@ -892,6 +892,10 @@ config DEBUG_WW_MUTEX_SLOWPATH
the full mutex checks enabled with (CONFIG_PROVE_LOCKING) this the full mutex checks enabled with (CONFIG_PROVE_LOCKING) this
will test all possible w/w mutex interface abuse with the will test all possible w/w mutex interface abuse with the
exception of simply not acquiring all the required locks. 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 config DEBUG_LOCK_ALLOC
bool "Lock debugging: detect incorrect freeing of live locks" bool "Lock debugging: detect incorrect freeing of live locks"