diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2020-02-16 12:01:04 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2020-02-17 10:49:06 -0800 |
| commit | 1e5d8e1e47afde23e3249aed25d7d124feff5c1c (patch) | |
| tree | 59913aad124869f0a39a972a025d9331865e7383 /include/linux/numa.h | |
| parent | 575e23b6e13c5f575a65144579a233b76f5ca86b (diff) | |
x86/mm: Introduce CONFIG_NUMA_KEEP_MEMINFO
Currently x86 numa_meminfo is marked __initdata in the
CONFIG_MEMORY_HOTPLUG=n case. In support of a new facility to allow
drivers to map reserved memory to a 'target_node'
(phys_to_target_node()), add support for removing the __initdata
designation for those users. Both memory hotplug and
phys_to_target_node() users select CONFIG_NUMA_KEEP_MEMINFO to tell the
arch to maintain its physical address to NUMA mapping infrastructure
post init.
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <x86@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/158188326422.894464.15742054998046628934.stgit@dwillia2-desk3.amr.corp.intel.com
Diffstat (limited to 'include/linux/numa.h')
| -rw-r--r-- | include/linux/numa.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/numa.h b/include/linux/numa.h index 20f4e44b186c..5773cd2613fc 100644 --- a/include/linux/numa.h +++ b/include/linux/numa.h @@ -13,6 +13,13 @@ #define NUMA_NO_NODE (-1) +/* optionally keep NUMA memory info available post init */ +#ifdef CONFIG_NUMA_KEEP_MEMINFO +#define __initdata_or_meminfo +#else +#define __initdata_or_meminfo __initdata +#endif + #ifdef CONFIG_NUMA int numa_map_to_online_node(int node); #else |