On Thu, 18 Apr 2019, Alexander Potapenko wrote: > This option adds the possibility to initialize newly allocated pages and > heap objects with zeroes. This is needed to prevent possible information > leaks and make the control-flow bugs that depend on uninitialized values > more deterministic. > > Initialization is done at allocation time at the places where checks for > __GFP_ZERO are performed. We don't initialize slab caches with > constructors to preserve their semantics. To reduce runtime costs of > checking cachep->ctor we replace a call to memset with a call to > cachep->poison_fn, which is only executed if the memory block needs to > be initialized. Just check for a ctor and then zero or use whatever pattern ? Why add a new function?
