On Tue, May 10, 2022 at 1:57 PM Marco Elver <elver@xxxxxxxxxx> wrote: > > > - Currently CONFIG_KASAN_GENERIC doesn't work with CONFIG_DEBUG_SLAB > > - (the resulting kernel does not boot). > > + (Incompatible with CONFIG_DEBUG_SLAB: the kernel does not boot.) > > Why aren't they made mutually exclusive via Kconfig constraints? Does it > work these days? > > Either KASAN_GENERIC and KASAN_SW_TAGS do "depends on !DEBUG_SLAB || > COMPILE_TEST", or DEBUG_SLAB does "depends on !(KASAN_GENERIC || KASAN_SW_TAGS) || COMPILE_TEST". > > I feel DEBUG_SLAB might not be used very much these days, so perhaps > DEBUG_SLAB should add the constraint, also given KASAN is the better > debugging aid. They are made exclusive: it's the KASAN option that depends on !DEBUG_SLAB. And KASAN_HW_TAGS doesn't have this note, as it doesn't work with SLAB at all at the moment. Moving the constraint to DEBUG_SLAB might make sense, but let's keep this patchset as a non-functional change. Thanks!
