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| author | Pasha Tatashin <pasha.tatashin@soleen.com> | 2023-01-17 20:46:17 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-02 22:33:22 -0800 |
| commit | 7ec7096b8577d3b899c1dae456a414f2d08c7ddb (patch) | |
| tree | 61fcd4e096bddc8dac5b223b8c5b14f4df7b0184 /mm | |
| parent | 64517d6e1291b5e942b00c53674ecf33f918313f (diff) | |
| download | linux-7ec7096b8577d3b899c1dae456a414f2d08c7ddb.tar.gz linux-7ec7096b8577d3b899c1dae456a414f2d08c7ddb.tar.bz2 linux-7ec7096b8577d3b899c1dae456a414f2d08c7ddb.zip | |
mm/page_ext: init page_ext early if there are no deferred struct pages
page_ext must be initialized after all struct pages are initialized.
Therefore, page_ext is initialized after page_alloc_init_late(), and can
optionally be initialized earlier via early_page_ext kernel parameter
which as a side effect also disables deferred struct pages.
Allow to automatically init page_ext early when there are no deferred
struct pages in order to be able to use page_ext during kernel boot and
track for example page allocations early.
[pasha.tatashin@soleen.com: fix build with CONFIG_PAGE_EXTENSION=n]
Link: https://lkml.kernel.org/r/20230118155251.2522985-1-pasha.tatashin@soleen.com
Link: https://lkml.kernel.org/r/20230117204617.1553748-1-pasha.tatashin@soleen.com
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Acked-by: Mike Rapoport (IBM) <rppt@kernel.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Charan Teja Kalla <quic_charante@quicinc.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Li Zhe <lizhe.67@bytedance.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/page_alloc.c | 6 | ||||
| -rw-r--r-- | mm/page_ext.c | 2 |
2 files changed, 6 insertions, 2 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 0cfad30fb44c..ecb9e9acfe7f 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -430,6 +430,8 @@ EXPORT_SYMBOL(nr_online_nodes); int page_group_by_mobility_disabled __read_mostly; +bool deferred_struct_pages __meminitdata; + #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT /* * During boot we initialize deferred pages on-demand, as needed, but once @@ -6803,8 +6805,10 @@ void __meminit memmap_init_range(unsigned long size, int nid, unsigned long zone if (context == MEMINIT_EARLY) { if (overlap_memmap_init(zone, &pfn)) continue; - if (defer_init(nid, pfn, zone_end_pfn)) + if (defer_init(nid, pfn, zone_end_pfn)) { + deferred_struct_pages = true; break; + } } page = pfn_to_page(pfn); diff --git a/mm/page_ext.c b/mm/page_ext.c index e2c22ffdbb81..dc1626be458b 100644 --- a/mm/page_ext.c +++ b/mm/page_ext.c @@ -92,7 +92,7 @@ unsigned long page_ext_size; static unsigned long total_usage; static struct page_ext *lookup_page_ext(const struct page *page); -bool early_page_ext; +bool early_page_ext __meminitdata; static int __init setup_early_page_ext(char *str) { early_page_ext = true; |