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mm/page_alloc.c: Zero all page struct in advance in memmap_init_zone when CONFIG_ROCKCHIP_THUNDER_BOOT=y

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In memmap_init_zone, it check all pages valid or deferred by single page,
then zero and init the corresponding page struct. It is safe to zero all
page struct in advance at once no matter what the state of every page is.
This can save time when booting kernel.

Change-Id: Ieb5864231fbc751e9438be488a77ce442b91ce7b
Signed-off-by: Simon Xue <xxm@rock-chips.com>
This commit is contained in:
Simon Xue
2020-04-08 09:46:47 +08:00
committed by Tao Huang
parent d762833e82
commit c3a852d019
1 changed files with 17 additions and 6 deletions
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23
mm/page_alloc.c
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@@ -1513,9 +1513,15 @@ static void free_one_page(struct zone *zone,
}
static void __meminit __init_single_page(struct page *page, unsigned long pfn,
unsigned long zone, int nid)
unsigned long zone, int nid,
bool zero_page_struct __maybe_unused)
{
#ifdef CONFIG_ROCKCHIP_THUNDER_BOOT
if (zero_page_struct)
mm_zero_struct_page(page);
#else
mm_zero_struct_page(page);
#endif
set_page_links(page, zone, nid, pfn);
init_page_count(page);
page_mapcount_reset(page);
@@ -1548,7 +1554,7 @@ static void __meminit init_reserved_page(unsigned long pfn)
if (pfn >= zone->zone_start_pfn && pfn < zone_end_pfn(zone))
break;
}
__init_single_page(pfn_to_page(pfn), pfn, zid, nid);
__init_single_page(pfn_to_page(pfn), pfn, zid, nid, true);
}
#else
static inline void init_reserved_page(unsigned long pfn)
@@ -1862,7 +1868,7 @@ static unsigned long __init deferred_init_pages(struct zone *zone,
} else {
page++;
}
__init_single_page(page, pfn, zid, nid);
__init_single_page(page, pfn, zid, nid, true);
nr_pages++;
}
return (nr_pages);
@@ -6212,6 +6218,11 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone,
}
#endif
#ifdef CONFIG_ROCKCHIP_THUNDER_BOOT
/* Zero all page struct in advance */
memset(pfn_to_page(start_pfn), 0, sizeof(struct page) * size);
#endif
for (pfn = start_pfn; pfn < end_pfn; ) {
/*
* There can be holes in boot-time mem_map[]s handed to this
@@ -6225,7 +6236,7 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone,
}
page = pfn_to_page(pfn);
__init_single_page(page, pfn, zone, nid);
__init_single_page(page, pfn, zone, nid, false);
if (context == MEMINIT_HOTPLUG)
__SetPageReserved(page);
@@ -6271,7 +6282,7 @@ void __ref memmap_init_zone_device(struct zone *zone,
for (pfn = start_pfn; pfn < end_pfn; pfn++) {
struct page *page = pfn_to_page(pfn);
__init_single_page(page, pfn, zone_idx, nid);
__init_single_page(page, pfn, zone_idx, nid, true);
/*
* Mark page reserved as it will need to wait for onlining
@@ -6356,7 +6367,7 @@ static u64 __meminit init_unavailable_range(unsigned long spfn,
+ pageblock_nr_pages - 1;
continue;
}
__init_single_page(pfn_to_page(pfn), pfn, zone, node);
__init_single_page(pfn_to_page(pfn), pfn, zone, node, true);
__SetPageReserved(pfn_to_page(pfn));
pgcnt++;
}