linux-kernel - Re: [PATCH v2] dma-buf: system_heap: use larger contiguous mappings instead of per-page mmap

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Message-ID: <51b0a361379b26ff14dd2f5b0aa4d6df@kernel.org>
Date: Fri, 24 Oct 2025 11:34:26 +0000
From: "Maxime Ripard" <mripard@...nel.org>
To: "Barry Song" <21cnbao@...il.com>
Cc: 21cnbao@...il.com, Brian.Starkey@....com, benjamin.gaignard@...labora.com, christian.koenig@....com, dri-devel@...ts.freedesktop.org, jstultz@...gle.com, linaro-mm-sig@...ts.linaro.org, linux-kernel@...r.kernel.org, linux-media@...r.kernel.org, sumit.semwal@...aro.org, tjmercier@...gle.com, v-songbaohua@...o.com, zhengtangquan@...o.com, "Maxime
 Ripard" <mripard@...nel.org>
Subject: Re: [PATCH v2] dma-buf: system_heap: use larger contiguous mappings
 instead of per-page mmap

On Tue, 21 Oct 2025 17:20:22 +1300, Barry Song wrote:
> From: Barry Song <v-songbaohua@...o.com>
> 
> We can allocate high-order pages, but mapping them one by
> one is inefficient. This patch changes the code to map
> as large a chunk as possible. The code looks somewhat
> 
> [ ... ]

Reviewed-by: Maxime Ripard <mripard@...nel.org>

Thanks!
Maxime