On 08/07/2017 07:37 AM, Christopher Lameter wrote: > On Fri, 4 Aug 2017, Laura Abbott wrote: > >> All slub debug features currently disable the fast path completely. >> Some features such as consistency checks require this to allow taking of >> locks. Poisoning and red zoning don't require this and can safely use >> the per-cpu fast path. Introduce a Kconfig to continue to use the fast >> path when 'fast' debugging options are enabled. The code will >> automatically revert to always using the slow path when 'slow' options >> are enabled. > > Ok I see that the objects are initialized with poisoning and redzoning but > I do not see that there is fastpath code to actually check the values > before the object is reinitialized. Is that intentional or am > I missing something? >
Yes, that's intentional here. I see the validation as a separate more expensive feature. I had a crude patch to do some checks for testing and I know Daniel Micay had an out of tree patch to do some checks as well. Thanks, Laura
