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Wed, 7 Dec 2022 10:17:36 +0800 From: Kefeng Wang To: , Andrew Morton CC: "Matthew Wilcox (Oracle)" , , Kefeng Wang Subject: [PATCH 1/2] mm: huge_memory: Convert madvise_free_huge_pmd to use a folio Date: Wed, 7 Dec 2022 10:34:30 +0800 Message-ID: <20221207023431.151008-1-wangkefeng.wang@huawei.com> X-Mailer: git-send-email 2.35.3 MIME-Version: 1.0 X-Originating-IP: [10.175.113.25] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To dggpemm500001.china.huawei.com (7.185.36.107) X-CFilter-Loop: Reflected X-Stat-Signature: bjkyritksr4p444qo8z7ywdnt4myamyo X-Rspam-User: X-Spamd-Result: default: False [0.64 / 9.00]; BAYES_HAM(-3.16)[92.29%]; R_MISSING_CHARSET(2.50)[]; MID_CONTAINS_FROM(1.00)[]; SUBJECT_HAS_UNDERSCORES(1.00)[]; DMARC_POLICY_ALLOW(-0.50)[huawei.com,quarantine]; R_SPF_ALLOW(-0.20)[+ip4:45.249.212.187/29]; RCVD_NO_TLS_LAST(0.10)[]; MIME_GOOD(-0.10)[text/plain]; R_DKIM_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCPT_COUNT_FIVE(0.00)[5]; MIME_TRACE(0.00)[0:+]; HAS_XOIP(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; FROM_HAS_DN(0.00)[]; ARC_SIGNED(0.00)[hostedemail.com:s=arc-20220608:i=1]; TO_DN_SOME(0.00)[]; ARC_NA(0.00)[] X-Rspamd-Queue-Id: AE142140006 X-Rspamd-Server: rspam06 X-HE-Tag: 1670379462-113949 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Using folios instead of pages removes several calls to compound_head(), Signed-off-by: Kefeng Wang Reviewed-by: Vishal Moola (Oracle) --- mm/huge_memory.c | 28 ++++++++++++++-------------- 1 file changed, 14 insertions(+), 14 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index abe6cfd92ffa..6e76c770529b 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1603,7 +1603,7 @@ bool madvise_free_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, { spinlock_t *ptl; pmd_t orig_pmd; - struct page *page; + struct folio *folio; struct mm_struct *mm = tlb->mm; bool ret = false; @@ -1623,15 +1623,15 @@ bool madvise_free_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, goto out; } - page = pmd_page(orig_pmd); + folio = pfn_folio(pmd_pfn(orig_pmd)); /* - * If other processes are mapping this page, we couldn't discard - * the page unless they all do MADV_FREE so let's skip the page. + * If other processes are mapping this folio, we couldn't discard + * the folio unless they all do MADV_FREE so let's skip the folio. */ - if (total_mapcount(page) != 1) + if (folio_mapcount(folio) != 1) goto out; - if (!trylock_page(page)) + if (!folio_trylock(folio)) goto out; /* @@ -1639,17 +1639,17 @@ bool madvise_free_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, * will deactivate only them. */ if (next - addr != HPAGE_PMD_SIZE) { - get_page(page); + folio_get(folio); spin_unlock(ptl); - split_huge_page(page); - unlock_page(page); - put_page(page); + split_folio(folio); + folio_unlock(folio); + folio_put(folio); goto out_unlocked; } - if (PageDirty(page)) - ClearPageDirty(page); - unlock_page(page); + if (folio_test_dirty(folio)) + folio_clear_dirty(folio); + folio_unlock(folio); if (pmd_young(orig_pmd) || pmd_dirty(orig_pmd)) { pmdp_invalidate(vma, addr, pmd); @@ -1660,7 +1660,7 @@ bool madvise_free_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, tlb_remove_pmd_tlb_entry(tlb, pmd, addr); } - mark_page_lazyfree(page); + mark_page_lazyfree(&folio->page); ret = true; out: spin_unlock(ptl);