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b=XSdGJ7Y4JCeYaWbrVEqw+Zg0L4uXOcmX6i8UjcuDseFSWJyMhckQyGQ0d8ZlIgfzq 1juNyI0buP50zwaEBagiKtsmQsoqFEFrLI3jytRX7qSs94dLEL2dQSbuME8qo9pvz8 iu7kJklDa/fxoDthC2UkMNGcDtPc8qaQlfiaBrOg= Date: Tue, 16 Jan 2024 13:31:59 -0800 From: Andrew Morton To: Yang Shi Cc: "Zach O'Keefe" , Yin Fengwei , oliver.sang@intel.com, riel@surriel.com, willy@infradead.org, cl@linux.com, ying.huang@intel.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 2/2] mm: mmap: map MAP_STACK to VM_NOHUGEPAGE Message-Id: <20240116133159.f92cbfebd792d85a498c23fa@linux-foundation.org> In-Reply-To: References: <20231221065943.2803551-1-shy828301@gmail.com> <20231221065943.2803551-2-shy828301@gmail.com> <7433e325-9af7-4b8c-888e-07a0debf8e46@intel.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 8C5A916000D X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: 3bx5ok3tpakfzt46xa1pf4h6xym4nobn X-HE-Tag: 1705440727-811250 X-HE-Meta: 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 q/AfpNHz Nfd5H 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 Tue, 16 Jan 2024 12:57:41 -0800 Yang Shi wrote: > > Should this be marked for stable? Given how easily it is for pthreads > > to allocate hugepages w/o this change, it can easily cause memory > > bloat on larger systems and/or users with high thread counts. I don't > > think that will be welcomed, and seems odd that just 6.7 should suffer > > this. > > Thanks for the suggestion, fine to me. > Thanks, added, along with Fixes: efa7df3e3bb5 ("mm: align larger anonymous mappings on THP boundaries")