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b=uF6EcYdZoYBi/cnqyRGqdBbXIekoYTTSwLn9gaMwZlOL2HmYCzOMPIn4q+ho6UO9u1 IHXNYxExPsJOcnW8MV5Ro+ueM4PYQoUHkwaT/vC9bOe6A1HiQhv4FOU5SYAlnIK+5VXN HNqoN8+ngAVcYAs5lRdmImUAmzPN2M6SvS/bMXGSG6aW6+4YnEafaXsFuhJpHxpatTcA imBB/rnT6f9yrvnqhj6T/dFFZYEloI54/OE2558j2s7szGJjg4lRc2TA4HhxqrpL9Fny q4Hb6CJ9EdbxwzjZNvmpImlk6mZ1tnSEjoQ2gImz33rXNZp+TS/Cx/n0fVqXQN4WNgKD 3LNA== X-Gm-Message-State: ABuFfohADTM+O/2/wf6eLErnx6oDbxBTvTUGd56MIXZK0RTTL1uDMjyv yFM6X3UxNFMOMdCu345LGvDX+Q== X-Google-Smtp-Source: ACcGV60cRgU0XyfJPBpItPjBh+EP7iRiHLZbhDbgbD69TJC4FgrTPRZLx9S2q81RSPgQ8LHOmiT4Xw== X-Received: by 2002:a17:902:8687:: with SMTP id g7-v6mr8297604plo.30.1539394348522; Fri, 12 Oct 2018 18:32:28 -0700 (PDT) Received: from joelaf.mtv.corp.google.com ([2620:0:1000:1601:3aef:314f:b9ea:889f]) by smtp.gmail.com with ESMTPSA id q7-v6sm6507828pfd.164.2018.10.12.18.32.25 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 12 Oct 2018 18:32:27 -0700 (PDT) From: "Joel Fernandes (Google)" To: linux-kernel@vger.kernel.org Subject: [PATCH 4/4] x86: select HAVE_MOVE_PMD for faster mremap (v1) Date: Fri, 12 Oct 2018 18:32:00 -0700 Message-Id: <20181013013200.206928-5-joel@joelfernandes.org> X-Mailer: git-send-email 2.19.0.605.g01d371f741-goog In-Reply-To: <20181013013200.206928-1-joel@joelfernandes.org> References: <20181013013200.206928-1-joel@joelfernandes.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181012_183239_554373_D233B05C X-CRM114-Status: GOOD ( 10.13 ) X-Spam-Score: -0.1 (/) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-0.1 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:643 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mips@linux-mips.org, Rich Felker , linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, Peter Zijlstra , Catalin Marinas , Dave Hansen , Will Deacon , mhocko@kernel.org, linux-mm@kvack.org, lokeshgidra@google.com, "Joel Fernandes \(Google\)" , linux-riscv@lists.infradead.org, elfring@users.sourceforge.net, Jonas Bonn , kvmarm@lists.cs.columbia.edu, dancol@google.com, Yoshinori Sato , sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-hexagon@vger.kernel.org, Helge Deller , "maintainer:X86 ARCHITECTURE 32-BIT AND 64-BIT" , hughd@google.com, "James E.J. Bottomley" , kasan-dev@googlegroups.com, anton.ivanov@kot-begemot.co.uk, Ingo Molnar , Geert Uytterhoeven , Andrey Ryabinin , linux-snps-arc@lists.infradead.org, kernel-team@android.com, Sam Creasey , Fenghua Yu , linux-s390@vger.kernel.org, Jeff Dike , linux-um@lists.infradead.org, Stefan Kristiansson , Julia Lawall , linux-m68k@lists.linux-m68k.org, Borislav Petkov , Andy Lutomirski , nios2-dev@lists.rocketboards.org, "Kirill A. Shutemov" , Stafford Horne , Guan Xuetao , Chris Zankel , Tony Luck , Richard Weinberger , linux-parisc@vger.kernel.org, Max Filippov , pantin@google.com, minchan@kernel.org, Thomas Gleixner , linux-alpha@vger.kernel.org, Ley Foon Tan , akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org, "David S. Miller" Sender: "linux-um" Errors-To: linux-um-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Moving page-tables at the PMD-level on x86 is known to be safe. Enable this option so that we can do fast mremap when possible. Signed-off-by: Joel Fernandes (Google) --- arch/x86/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 1a0be022f91d..01c02a9d7825 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -171,6 +171,7 @@ config X86 select HAVE_MEMBLOCK_NODE_MAP select HAVE_MIXED_BREAKPOINTS_REGS select HAVE_MOD_ARCH_SPECIFIC + select HAVE_MOVE_PMD select HAVE_NMI select HAVE_OPROFILE select HAVE_OPTPROBES