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| author | Miaohe Lin <linmiaohe@huawei.com> | 2022-07-04 21:21:57 +0800 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-07-17 17:14:46 -0700 |
| commit | a17206dac7b262e7abed5a05e34a6bd6bd0a9b06 (patch) | |
| tree | e9c97c453a0739493ec2b12bc91bb657514144ff /mm/huge_memory.c | |
| parent | 0b175468a02d9ae8b97919b4de62ab4da578b520 (diff) | |
| download | linux-starfive-a17206dac7b262e7abed5a05e34a6bd6bd0a9b06.tar.gz linux-starfive-a17206dac7b262e7abed5a05e34a6bd6bd0a9b06.tar.bz2 linux-starfive-a17206dac7b262e7abed5a05e34a6bd6bd0a9b06.zip | |
mm/huge_memory: minor cleanup for split_huge_pages_all
There is nothing to do if a zone doesn't have any pages managed by the
buddy allocator. So we should check managed_zone instead. Also if a thp
is found, there's no need to traverse the subpages again.
Link: https://lkml.kernel.org/r/20220704132201.14611-13-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zach O'Keefe <zokeefe@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index de3feb97f0e9..b6d915f24909 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2857,9 +2857,12 @@ static void split_huge_pages_all(void) unsigned long total = 0, split = 0; pr_debug("Split all THPs\n"); - for_each_populated_zone(zone) { + for_each_zone(zone) { + if (!managed_zone(zone)) + continue; max_zone_pfn = zone_end_pfn(zone); for (pfn = zone->zone_start_pfn; pfn < max_zone_pfn; pfn++) { + int nr_pages; if (!pfn_valid(pfn)) continue; @@ -2875,8 +2878,10 @@ static void split_huge_pages_all(void) total++; lock_page(page); + nr_pages = thp_nr_pages(page); if (!split_huge_page(page)) split++; + pfn += nr_pages - 1; unlock_page(page); next: put_page(page); |