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[149.14.88.26]) by smtp.gmail.com with ESMTPSA id c2-20020a5d4142000000b0033cf453f2bbsm14023061wrq.35.2024.02.28.02.31.50 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 28 Feb 2024 02:31:51 -0800 (PST) Message-ID: <75fb8bf8-f9bc-410d-8c22-f69cbf2080a9@redhat.com> Date: Wed, 28 Feb 2024 11:31:50 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 6/8] mm: page_owner: add support for splitting to any order in split page_owner. To: Zi Yan , "Pankaj Raghav (Samsung)" , linux-mm@kvack.org Cc: "Matthew Wilcox (Oracle)" , Yang Shi , Yu Zhao , "Kirill A . Shutemov" , Ryan Roberts , =?UTF-8?Q?Michal_Koutn=C3=BD?= , Roman Gushchin , Zach O'Keefe , Hugh Dickins , Luis Chamberlain , Andrew Morton , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org References: <20240226205534.1603748-1-zi.yan@sent.com> <20240226205534.1603748-7-zi.yan@sent.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: <20240226205534.1603748-7-zi.yan@sent.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 848A6A0006 X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: pf7dpg8kqunezcre4j7gzon3ykcyz38h X-HE-Tag: 1709116316-397514 X-HE-Meta: U2FsdGVkX1/JTqLQb6GAS+efyMumjY0Y3z0jk9zKSz4ubXus6AIvSv3Xg83sMnxOzzTCdLCsGjvhnhEtLET/KJLBicttiXf5W7KvVTSwF3EjkmMFoigw3ATDPCaxZgBj0DODFP1l3o2SZ3OZ2H51CfRdb0EUetA7QXwJ2qbp4zmMEf392RUZKkXbEy+BqsP3WAzZFYu/Rrae0nXf61SezGmJ7FVrfkvSVJ8kMM1w9K1EcALll3yeqod1xYLk87xJa+oCfB7fwdjk+PliCYxcQR73Gqf1eZ6bcXAIxFreASd5xr6UGZxFBvndXHuMjmiHZ7mAxPDXLmcgMt0hY5c/MXEqVUMiEbA3jmcJrtQhsyhn6oyTF9FjeUWHz5JIUWXThyUJEFnHuYOTK7lbXMDFOEi/0XESL3WCHu7BkZBY37AYo1nwvNithAd2omn7HdhfIIks0Vv+UX4yUr0FD9fWbGQkVeEMReLOU4gmPxFDUVdu8103zEP4IycJ2GQU75ezUgMefww7wMTqBJvz91p/MoCYP0qy78jl6RqIIR4YoTj+t3VEn06csQq5+ACsJaaoZDWd557oPPTsAxB2IO9c1N3xxMhPIUatSVJlOw4yI8bdgwTANnFW9xq1gIPtaydIse8fgU390zsi6iwHM1VpwRGHsGQygrdoPX+tN3UqD3vnfwWAYWJdeNoh4ln51YqD1TYTjfKN6f+vsxXXw6hP3D2kumlfnWICyARRjdZXT+k6mT49nfptClDKGrT8BlGPb1tkdB4KAyh7hcRlv3CaWQ3xUlnmRfSSLVgpoyOiQAV5Zg0uK45PKAq0EoTvZn6naU1uoDk75W8el4okzU8HDLnTbIbXQWP9w1e1bLM4Zs4F26yTgpNZZ4KUnL434voNl7Ha0QtQgr62hjOfzNBB7zAfNpAx+IzCE0WEQs4JXxfsFuNnyub+xrB1sINuDkU2DvSlg4pR7UbXnCm/EkG wnKLDUvz b3q6RArgvcHSrqNCxOJ5dKXUCguuTN5tzZoKjU8Khh/POmGt29H54syjpL5yB5OmhUgtrUkuA7OfpWP9ZxpwMphiTL7q5PdypjtUfemaLSL2z92gGg2RFgJcUajtsJ3PVko1LuVaCa7yf5nm0UGzAbytUVHQGLotyd1dinu8zQ2Yon10It5TaZV2imS0wFwFkFmflGeAhwpL10k8NjlALcspZpw== 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: On 26.02.24 21:55, Zi Yan wrote: > From: Zi Yan > > It adds a new_order parameter to set new page order in page owner. > It prepares for upcoming changes to support split huge page to any > lower order. > > Signed-off-by: Zi Yan > --- > include/linux/page_owner.h | 13 ++++++++----- > mm/huge_memory.c | 2 +- > mm/page_alloc.c | 4 ++-- > mm/page_owner.c | 7 +++---- > 4 files changed, 14 insertions(+), 12 deletions(-) > > diff --git a/include/linux/page_owner.h b/include/linux/page_owner.h > index 2b39c8e19d98..debdc25f08b9 100644 > --- a/include/linux/page_owner.h > +++ b/include/linux/page_owner.h > @@ -11,7 +11,8 @@ extern struct page_ext_operations page_owner_ops; > extern void __reset_page_owner(struct page *page, unsigned short order); > extern void __set_page_owner(struct page *page, > unsigned short order, gfp_t gfp_mask); > -extern void __split_page_owner(struct page *page, int order); > +extern void __split_page_owner(struct page *page, int old_order, > + int new_order); > extern void __folio_copy_owner(struct folio *newfolio, struct folio *old); > extern void __set_page_owner_migrate_reason(struct page *page, int reason); > extern void __dump_page_owner(const struct page *page); > @@ -31,10 +32,11 @@ static inline void set_page_owner(struct page *page, > __set_page_owner(page, order, gfp_mask); > } > > -static inline void split_page_owner(struct page *page, int order) > +static inline void split_page_owner(struct page *page, int old_order, > + int new_order) > { > if (static_branch_unlikely(&page_owner_inited)) > - __split_page_owner(page, order); > + __split_page_owner(page, old_order, new_order); > } > static inline void folio_copy_owner(struct folio *newfolio, struct folio *old) > { > @@ -56,10 +58,11 @@ static inline void reset_page_owner(struct page *page, unsigned short order) > { > } > static inline void set_page_owner(struct page *page, > - unsigned int order, gfp_t gfp_mask) > + unsigned short order, gfp_t gfp_mask) > { > } > -static inline void split_page_owner(struct page *page, int order) > +static inline void split_page_owner(struct page *page, int old_order, > + int new_order) > { > } > static inline void folio_copy_owner(struct folio *newfolio, struct folio *folio) > diff --git a/mm/huge_memory.c b/mm/huge_memory.c > index 5d4b7c17b9bc..b2df788c11fa 100644 > --- a/mm/huge_memory.c > +++ b/mm/huge_memory.c > @@ -2933,7 +2933,7 @@ static void __split_huge_page(struct page *page, struct list_head *list, > unlock_page_lruvec(lruvec); > /* Caller disabled irqs, so they are still disabled here */ > > - split_page_owner(head, order); > + split_page_owner(head, order, 0); > > /* See comment in __split_huge_page_tail() */ > if (PageAnon(head)) { > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > index c31a468fe317..cc41341c08f4 100644 > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -2652,7 +2652,7 @@ void split_page(struct page *page, unsigned int order) > > for (i = 1; i < (1 << order); i++) > set_page_refcounted(page + i); > - split_page_owner(page, order); > + split_page_owner(page, order, 0); > split_page_memcg(page, order, 0); > } > EXPORT_SYMBOL_GPL(split_page); > @@ -4839,7 +4839,7 @@ static void *make_alloc_exact(unsigned long addr, unsigned int order, > struct page *page = virt_to_page((void *)addr); > struct page *last = page + nr; > > - split_page_owner(page, order); > + split_page_owner(page, order, 0); > split_page_memcg(page, order, 0); > while (page < --last) > set_page_refcounted(last); > diff --git a/mm/page_owner.c b/mm/page_owner.c > index b678f7a6e702..033e349f6479 100644 > --- a/mm/page_owner.c > +++ b/mm/page_owner.c > @@ -306,19 +306,18 @@ void __set_page_owner_migrate_reason(struct page *page, int reason) > page_ext_put(page_ext); > } > > -void __split_page_owner(struct page *page, int order) > +void __split_page_owner(struct page *page, int old_order, int new_order) > { > int i; > struct page_ext *page_ext = page_ext_get(page); > struct page_owner *page_owner; > - unsigned int nr = 1 << order; > > if (unlikely(!page_ext)) > return; > > - for (i = 0; i < nr; i++) { > + for (i = 0; i < (1 << old_order); i++) { > page_owner = get_page_owner(page_ext); > - page_owner->order = 0; > + page_owner->order = new_order; > page_ext = page_ext_next(page_ext); > } > page_ext_put(page_ext); Acked-by: David Hildenbrand -- Cheers, David / dhildenb