* Dave Hansen <dave.hansen@xxxxxxxxx> wrote: > On 5/16/25 07:08, Ingo Molnar wrote: > >> And is there any value to support !SPARSEMEM_VMEMMAP? > > Not really IMHO: > > > > .config.opensuse.default: CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y > > .config.ubuntu.localinstall: CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y > > .config.fedora.generic: CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y > > .config.rhel.generic: CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y > > I look at the distro configs all the time as well. > > But let's also not forget that none of these have lockdep turned on, Not actually true, quite a few distro debug kernel packages have lockdep on, and it's often enabled in internal QA rigs as well. Not so SPARSEMEM_VMEMMAP... > [...] and we don't want to toss out lockdep support on x86, for > example. ;) That's an apples to oranges comparison: - SPARSEMEM_VMEMMAP is always enabled, in standard and debug kernels as well. - lockdep is disabled in standard kernels, enabled in debug kernels and very much relied on. Thanks, Ingo
