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[209.85.208.178]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-530bba3cf54sm1232256e87.266.2024.08.05.12.51.08 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 05 Aug 2024 12:51:08 -0700 (PDT) Received: by mail-lj1-f178.google.com with SMTP id 38308e7fff4ca-2f029e9c9cfso161880391fa.2 for ; Mon, 05 Aug 2024 12:51:08 -0700 (PDT) X-Forwarded-Encrypted: i=1; AJvYcCXE/yYktFDadnq88peVdP7qQ4NQbt/KJXOHpRrnVjEcclPXC6d/zxddBLRk6Rto2Z7m35yRt9LNnmcNXf2EjYICRi0= X-Received: by 2002:a2e:9845:0:b0:2ef:20ae:d117 with SMTP id 38308e7fff4ca-2f15aa88cc7mr104885471fa.10.1722887468283; Mon, 05 Aug 2024 12:51:08 -0700 (PDT) MIME-Version: 1.0 References: <202408041602.caa0372-oliver.sang@intel.com> In-Reply-To: From: Linus Torvalds Date: Mon, 5 Aug 2024 12:50:52 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [linus:master] [mseal] 8be7258aad: stress-ng.pagemove.page_remaps_per_sec -4.4% regression To: Jeff Xu Cc: Michael Ellerman , Nicholas Piggin , Christophe Leroy , Pedro Falcato , kernel test robot , Jeff Xu , oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org, Andrew Morton , Kees Cook , "Liam R. Howlett" , Dave Hansen , Greg Kroah-Hartman , Guenter Roeck , Jann Horn , Jonathan Corbet , Jorge Lucangeli Obes , Matthew Wilcox , Muhammad Usama Anjum , =?UTF-8?Q?Stephen_R=C3=B6ttger?= , Suren Baghdasaryan , Amer Al Shanawany , Javier Carrasco , Shuah Khan , linux-api@vger.kernel.org, linux-mm@kvack.org, ying.huang@intel.com, feng.tang@intel.com, fengwei.yin@intel.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 2034D1A0009 X-Stat-Signature: w91z3dxo38ktz9j6cfuqs996pgutsqpd X-Rspam-User: X-HE-Tag: 1722887470-721285 X-HE-Meta: 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 5HOO5VKe 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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: On Mon, 5 Aug 2024 at 12:48, Linus Torvalds wrote: > > But x86 has the same context.vdso logic, and does *not* set the > pointer before installing the vma, for example. Also does not zero it > out on munmap(), although it does have the mremap logic. Oh, and the empty stale arch_unmap() code on the x86 side has never been about the vdso thing, it was about some horrid MPX notification that no longer exists. In case people wonder like I did. Linus