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mm/page_alloc: move set_page_refcounted() to end of __alloc_pages()

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Remove some code duplication by calling set_page_refcounted() at the end
of __alloc_pages() instead of after each call that can allocate a page. 
That means that we free a frozen page if we've exceeded the allowed memcg
memory.

Link: https://lkml.kernel.org/r/20241125210149.2976098-13-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2024-11-25 21:01:44 +00:00 committed by Andrew Morton
parent a88de400e3
commit c972106db3
1 changed files with 4 additions and 6 deletions
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10
mm/page_alloc.c
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@ -4750,10 +4750,8 @@ struct page *__alloc_pages_noprof(gfp_t gfp, unsigned int order,
/* First allocation attempt */ /* First allocation attempt */
page = get_page_from_freelist(alloc_gfp, order, alloc_flags, &ac); page = get_page_from_freelist(alloc_gfp, order, alloc_flags, &ac);
if (likely(page)) { if (likely(page))
set_page_refcounted(page);
goto out; goto out;
}
alloc_gfp = gfp; alloc_gfp = gfp;
ac.spread_dirty_pages = false; ac.spread_dirty_pages = false;
@ -4765,15 +4763,15 @@ struct page *__alloc_pages_noprof(gfp_t gfp, unsigned int order,
ac.nodemask = nodemask; ac.nodemask = nodemask;
page = __alloc_pages_slowpath(alloc_gfp, order, &ac); page = __alloc_pages_slowpath(alloc_gfp, order, &ac);
if (page)
set_page_refcounted(page);
out: out:
if (memcg_kmem_online() && (gfp & __GFP_ACCOUNT) && page && if (memcg_kmem_online() && (gfp & __GFP_ACCOUNT) && page &&
unlikely(__memcg_kmem_charge_page(page, gfp, order) != 0)) { unlikely(__memcg_kmem_charge_page(page, gfp, order) != 0)) {
__free_pages(page, order); free_frozen_pages(page, order);
page = NULL; page = NULL;
} }
if (page)
set_page_refcounted(page);
trace_mm_page_alloc(page, order, alloc_gfp, ac.migratetype); trace_mm_page_alloc(page, order, alloc_gfp, ac.migratetype);
kmsan_alloc_page(page, order, alloc_gfp); kmsan_alloc_page(page, order, alloc_gfp);