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| author | Mel Gorman <mel@csn.ul.ie> | 2008-07-24 06:26:51 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-24 19:47:13 +0200 |
| commit | 708614e6180f398cd307ea0048d48ba6fa274610 (patch) | |
| tree | 8fedf22cf9a2f404e2aef10c5b3858b99880c4c2 /mm/page_alloc.c | |
| parent | mm: add a basic debugging framework for memory initialisation (diff) | |
| download | linux-708614e6180f398cd307ea0048d48ba6fa274610.tar.xz linux-708614e6180f398cd307ea0048d48ba6fa274610.zip | |
mm: verify the page links and memory model
Print out information on how the page flags are being used if mminit_loglevel
is MMINIT_VERIFY or higher and unconditionally performs sanity checks on the
flags regardless of loglevel.
When the page flags are updated with section, node and zone information, a
check are made to ensure the values can be retrieved correctly. Finally we
confirm that pfn_to_page and page_to_pfn are the correct inverse functions.
[akpm@linux-foundation.org: fix printk warnings]
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 0908352ba727..acab6ad326df 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2534,6 +2534,7 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone, } page = pfn_to_page(pfn); set_page_links(page, zone, nid, pfn); + mminit_verify_page_links(page, zone, nid, pfn); init_page_count(page); reset_page_mapcount(page); SetPageReserved(page); @@ -2836,6 +2837,12 @@ __meminit int init_currently_empty_zone(struct zone *zone, zone->zone_start_pfn = zone_start_pfn; + mminit_dprintk(MMINIT_TRACE, "memmap_init", + "Initialising map node %d zone %lu pfns %lu -> %lu\n", + pgdat->node_id, + (unsigned long)zone_idx(zone), + zone_start_pfn, (zone_start_pfn + size)); + zone_init_free_lists(zone); return 0; @@ -3961,6 +3968,7 @@ void __init free_area_init_nodes(unsigned long *max_zone_pfn) early_node_map[i].end_pfn); /* Initialise every node */ + mminit_verify_pageflags_layout(); setup_nr_node_ids(); for_each_online_node(nid) { pg_data_t *pgdat = NODE_DATA(nid); |