Re: [PATCH v2 07/33] x86/intel_rdt: Add support for Cache Allocation detection

[Luck, Tony]

On Tue, Sep 13, 2016 at 03:40:18PM -0700, Dave Hansen wrote:
> Are you sure you don't want to add RDT to disabled-features.h?  You have
> a config option for it, so it seems like you should also be able to
> optimize some of these checks away when the config option is off.

Makefile looks like this:

obj-$(CONFIG_INTEL_RDT)        += intel_rdt.o intel_rdt_rdtgroup.o intel_rdt_schemata.o

which seems to skip compiling all our code when the CONFIG
option is off.

Our hooks to generic code look like:

+#ifdef CONFIG_INTEL_RDT
+extern void rdtgroup_fork(struct task_struct *child);
+extern void rdtgroup_exit(struct task_struct *tsk);
+#else
+static inline void rdtgroup_fork(struct task_struct *child) {}
+static inline void rdtgroup_exit(struct task_struct *tsk) {}
+#endif /* CONFIG_INTEL_RDT */


Does this disabled-features.h thing do something more?

-Tony