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J . Mercier" , linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, steve.kang@unisoc.com Subject: Re: [PATCH 2/2] driver: dma-buf: use alloc_pages_bulk_list for order-0 allocation Message-ID: References: <20251014083230.1181072-1-zhaoyang.huang@unisoc.com> <20251014083230.1181072-3-zhaoyang.huang@unisoc.com> <87953097-a105-4775-88a5-9b3a676ff139@amd.com> <20251014171003.57bbfd63@mordecai.tesarici.cz> <97da9924-9489-4d30-a858-8ee5c87bc031@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 25F4F1C0002 X-Stat-Signature: 3nbtixbywxtgk6hy1zi4tg3xb9kgwqmj X-Rspam-User: X-HE-Tag: 1760498492-810449 X-HE-Meta: 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 kzo/+PyT n1HyVNVhWWtaxynz1M0YwVb9Q2dOXp1I7tXX3w6jYSxALhOgqlIld68+OHPXjaEh+N2SvF2jCPZI2t9+H5+YbSr2b3pQbddMVXnI5ciGIx1n3KQG9Z7E/Sje9Gm26bignSMuOv9Z+6QG+Nvhynr0fDrXfelnQX9tlKUf8xl18ByYvuntf1D/W9lFookL5ZzbTqMEMc116yHnHBOTOikLQ4l+ZcTepkhbvgdM+ 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 Wed, Oct 15, 2025 at 09:12:07AM +0800, Zhaoyang Huang wrote: > > Could be that we need to make this behavior conditional, but somebody would need to come up with some really good arguments to justify the complexity. > ok, should we use CONFIG_DMA_BUF_BULK_ALLOCATION or a variable > controlled by sysfs interface? No. Explain what you're trying to solve, because you haven't yet.