diff options
| author | Mel Gorman <mgorman@suse.de> | 2015-06-30 14:57:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-30 19:44:56 -0700 |
| commit | 3a80a7fa7989fbb6aa56bb6ad31811b62cf99e60 (patch) | |
| tree | cfcd9fb093f891b4218618d63347cfa63be7e38f /mm/internal.h | |
| parent | 75a592a47129dcfc1aec40e7d3cdf239a767d441 (diff) | |
mm: meminit: initialise a subset of struct pages if CONFIG_DEFERRED_STRUCT_PAGE_INIT is set
This patch initalises all low memory struct pages and 2G of the highest
zone on each node during memory initialisation if
CONFIG_DEFERRED_STRUCT_PAGE_INIT is set. That config option cannot be set
but will be available in a later patch. Parallel initialisation of struct
page depends on some features from memory hotplug and it is necessary to
alter alter section annotations.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Tested-by: Nate Zimmer <nzimmer@sgi.com>
Tested-by: Waiman Long <waiman.long@hp.com>
Tested-by: Daniel J Blueman <daniel@numascale.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Nate Zimmer <nzimmer@sgi.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Waiman Long <waiman.long@hp.com>
Cc: Scott Norton <scott.norton@hp.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h index 58e9022e3757..88ac7be741ca 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -387,6 +387,24 @@ static inline void mminit_verify_zonelist(void) } #endif /* CONFIG_DEBUG_MEMORY_INIT */ +/* + * Deferred struct page initialisation requires init functions that are freed + * before kswapd is available. Reuse the memory hotplug section annotation + * to mark the required code. + * + * __defermem_init is code that always exists but is annotated __meminit to + * avoid section warnings. + * __defer_init code gets marked __meminit when deferring struct page + * initialistion but is otherwise in the init section. + */ +#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT +#define __defermem_init __meminit +#define __defer_init __meminit +#else +#define __defermem_init +#define __defer_init __init +#endif + /* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */ #if defined(CONFIG_SPARSEMEM) extern void mminit_validate_memmodel_limits(unsigned long *start_pfn, |