diff options
| author | Mel Gorman | 2015-06-30 14:57:02 -0700 |
|---|---|---|
| committer | Linus Torvalds | 2015-06-30 19:44:56 -0700 |
| commit | 3a80a7fa7989fbb6aa56bb6ad31811b62cf99e60 (patch) | |
| tree | cfcd9fb093f891b4218618d63347cfa63be7e38f /drivers/base | |
| 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 'drivers/base')
| -rw-r--r-- | drivers/base/node.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/base/node.c b/drivers/base/node.c index a2aa65b4215d..31df474d72f4 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -359,12 +359,16 @@ int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE #define page_initialized(page) (page->lru.next) -static int get_nid_for_pfn(unsigned long pfn) +static int __init_refok get_nid_for_pfn(unsigned long pfn) { struct page *page; if (!pfn_valid_within(pfn)) return -1; +#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT + if (system_state == SYSTEM_BOOTING) + return early_pfn_to_nid(pfn); +#endif page = pfn_to_page(pfn); if (!page_initialized(page)) return -1; |