linux-kernel - Re: [PATCH 2/2] driver: dma-buf: use alloc_pages_bulk

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Message-ID: <aO8TKQN6ifOSMRSC@casper.infradead.org>
Date: Wed, 15 Oct 2025 04:21:13 +0100
From: Matthew Wilcox <willy@...radead.org>
To: Zhaoyang Huang <huangzhaoyang@...il.com>
Cc: Christian König <christian.koenig@....com>,
	Suren Baghdasaryan <surenb@...gle.com>,
	Petr Tesarik <ptesarik@...e.com>,
	"zhaoyang.huang" <zhaoyang.huang@...soc.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Hildenbrand <david@...hat.com>,
	Mel Gorman <mgorman@...hsingularity.net>,
	Vlastimil Babka <vbabka@...e.cz>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Benjamin Gaignard <benjamin.gaignard@...labora.com>,
	Brian Starkey <Brian.Starkey@....com>,
	John Stultz <jstultz@...gle.com>,
	"T . J . Mercier" <tjmercier@...gle.com>,
	linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	linaro-mm-sig@...ts.linaro.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, steve.kang@...soc.com
Subject: Re: [PATCH 2/2] driver: dma-buf: use alloc_pages_bulk_list for
 order-0 allocation

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.