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mm: huge_memory: convert split_huge_pages_all() to use a folio 

JIRA: https://issues.redhat.com/browse/RHEL-27740
Tested: by me
Conflicts: context, due 7dc0a2975

commit 630e7c5ee3399be509447035428994e2d88f12c1
Author: Kefeng Wang <wangkefeng.wang@huawei.com>
Date:   Thu Dec 29 20:25:03 2022 +0800

    mm: huge_memory: convert split_huge_pages_all() to use a folio

    Straightforwardly convert split_huge_pages_all() to use a folio.

    Link: https://lkml.kernel.org/r/20221229122503.149083-1-wangkefeng.wang@huawei.com
    Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
    Cc: Mike Kravetz <mike.kravetz@oracle.com>
    Cc: Matthew Wilcox <willy@infradead.org>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Signed-off-by: Aristeu Rozanski <arozansk@redhat.com>
This commit is contained in:
Aristeu Rozanski 2024-04-29 14:32:56 -04:00
parent 836d6a510f
commit bcfbd049c0
1 changed files with 18 additions and 9 deletions
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27
mm/huge_memory.c
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@ -2935,6 +2935,7 @@ static void split_huge_pages_all(void)
{
struct zone *zone;
struct page *page;
struct folio *folio;
unsigned long pfn, max_zone_pfn;
unsigned long total = 0, split = 0;
@ -2945,26 +2946,34 @@ static void split_huge_pages_all(void)
max_zone_pfn = zone_end_pfn(zone);
for (pfn = zone->zone_start_pfn; pfn < max_zone_pfn; pfn++) {
int nr_pages;
page = pfn_to_online_page(pfn);
if (!page || !get_page_unless_zero(page))
if (!page || PageTail(page))
continue;
folio = page_folio(page);
if (!folio_try_get(folio))
continue;
if (zone != page_zone(page))
if (unlikely(page_folio(page) != folio))
goto next;
if (!PageHead(page) || PageHuge(page) || !PageLRU(page))
if (zone != folio_zone(folio))
goto next;
if (!folio_test_large(folio)
|| folio_test_hugetlb(folio)
|| !folio_test_lru(folio))
goto next;
total++;
lock_page(page);
nr_pages = thp_nr_pages(page);
if (!split_huge_page(page))
folio_lock(folio);
nr_pages = folio_nr_pages(folio);
if (!split_folio(folio))
split++;
pfn += nr_pages - 1;
unlock_page(page);
folio_unlock(folio);
next:
put_page(page);
folio_put(folio);
cond_resched();
}
}