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Wed, 28 Jun 2023 17:28:10 -0700 (PDT) MIME-Version: 1.0 References: <20230626171430.3167004-1-ryan.roberts@arm.com> <1fb0c4cb-a709-de20-d643-32ed43550059@arm.com> In-Reply-To: From: Yu Zhao Date: Wed, 28 Jun 2023 18:27:34 -0600 Message-ID: Subject: Re: [PATCH v1 00/10] variable-order, large folios for anonymous memory To: Yin Fengwei Cc: Ryan Roberts , Andrew Morton , "Matthew Wilcox (Oracle)" , "Kirill A. Shutemov" , David Hildenbrand , Catalin Marinas , Will Deacon , Geert Uytterhoeven , Christian Borntraeger , Sven Schnelle , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-s390@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 40A8C18000D X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: sqari6rw9znzstd9gwooy1rsmsgqg91p X-HE-Tag: 1687998490-418997 X-HE-Meta: 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 u1toOajN kyBTznKYRAmvxilr9baBSE0xSo+QSfrwwMmLAMLokWquYkp91kJekCkYpjAmTDSkhD66i5HAm7MTqQVv23eKhL7BUdobCGHM29j/0rR410/z1ZxS/exCMN4PeNCnSFPhstq7YPtW2Id45lhDMC8GzMzKURmGW5QneAHUX9RO4ZdMSHi1/UDA56VsAaZRr6cA4wo/vB0eWrL/sYy+RxfYIGjrtZb4JkA1HhSuoz6ybn1q7weF3ENqekKT/Fw== 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: On Wed, Jun 28, 2023 at 5:59=E2=80=AFPM Yin Fengwei = wrote: > > Hi Yu, > > On 6/29/23 02:22, Yu Zhao wrote: > > And please make sure it's disabled by default, because we are still > > missing many important functions, e.g., I don't think we can mlock() > > when large() && !pmd_mappable(), see mlock_pte_range() and > > mlock_vma_folio(). We can fix it along with many things later, but we > > need to present a plan and a schedule now. Otherwise, there would be > > pushback if we try to land the series without supporting mlock(). > > > > Do you or Fengwei plan to take on it? (I personally don't.) If not, > Do you mean the mlock() with large folio? Yes. I can work on it. Thanks. Great. Thanks! Other places that have the similar problem but are probably easier to fix than the mlock() case: * madvise_cold_or_pageout_pte_range() * shrink_folio_list()