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Thu, 23 Oct 2025 19:59:47 +0800 From: Kefeng Wang To: Andrew Morton , David Hildenbrand , Oscar Salvador , Muchun Song , CC: , , Zi Yan , Vlastimil Babka , Brendan Jackman , Johannes Weiner , Matthew Wilcox , Kefeng Wang Subject: [PATCH v4 0/6] mm: hugetlb: allocate frozen gigantic folio Date: Thu, 23 Oct 2025 19:59:34 +0800 Message-ID: <20251023115940.3573158-1-wangkefeng.wang@huawei.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.50.87.83] X-ClientProxiedBy: kwepems200002.china.huawei.com (7.221.188.68) To dggpemf100008.china.huawei.com (7.185.36.138) X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 3B2431C0002 X-Stat-Signature: ma7h1wbt5d8gx36wouenbqyn5jj4466a X-Rspam-User: X-HE-Tag: 1761220794-338557 X-HE-Meta: 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 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: List-Subscribe: List-Unsubscribe: Introduce alloc_contig_frozen_pages() and cma_alloc_frozen_compound() which avoid atomic operation about page refcount, and then convert to allocate frozen gigantic folio by the new helpers in hugetlb to cleanup the alloc_gigantic_folio(). v4: - add VM_WARN_ON_PAGE and instead of VM_BUG_ON_PAGE in __split_page() - add back debug infos in __cma_release() - rename alloc_contig_range_frozen to alloc_contig_frozen_range, and make alloc_contig_{range,pages} to only allocate non-compound pages, the free_contig_range() adjusted accordingly - add set_pages_refcounted helper to reduce code duplication - collect ACK v3: - Fix built warn/err, found by lkp test - Address some David's comments, - Force on frozen part and drop the optimization part - Rename split_non_compound_pages() to __split_pages() - Adding back debug print/WARN_ON if no cma range found or the pfn range of page is not full match the cma range. v2: - Optimize gigantic folio allocation speed - Using HPAGE_PUD_ORDER in debug_vm_pgtable - Address some David's comments, - kill folio_alloc_gigantic() - add generic cma_alloc_frozen{_compound}() instead of cma_{alloc,free}_folio Kefeng Wang (6): mm: debug_vm_pgtable: add debug_vm_pgtable_free_huge_page() mm: page_alloc: add __split_page() mm: cma: add __cma_release() mm: page_alloc: add alloc_contig_frozen_{range,pages}() mm: cma: add cma_alloc_frozen{_compound}() mm: hugetlb: allocate frozen pages in alloc_gigantic_folio() include/linux/cma.h | 27 ++---- include/linux/gfp.h | 52 +++++----- include/linux/mmdebug.h | 9 ++ mm/cma.c | 107 ++++++++++----------- mm/debug_vm_pgtable.c | 38 ++++---- mm/hugetlb.c | 58 +++--------- mm/hugetlb_cma.c | 29 +++--- mm/hugetlb_cma.h | 10 +- mm/internal.h | 11 +++ mm/page_alloc.c | 204 ++++++++++++++++++++++++++++------------ 10 files changed, 293 insertions(+), 252 deletions(-) -- 2.27.0