From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 326AD3128DC; Fri, 24 Oct 2025 11:34:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761305670; cv=none; b=ZujbkTrnuXGzIV8uH0LLDYk9GDk2cjcJi8LPrAWUsNM8RlR3DXxiKBpKBIHyXOZza9qIETxV5lSywAaq+eIVLiyp3DW8HKkiNR9Xp4luHp0qSPmwLlaOPlp4P+GS1+MpjeZHbhLlfaMuZcYNYOLyz2MpmY+7u6kEg1vdp8W+KJ4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761305670; c=relaxed/simple; bh=C2071/4y7/j52Jeu+ERq03SVVMZ5dIN9u1f1mb/b9vQ=; h=Message-ID:Date:From:To:Subject:In-Reply-To:References:Cc; b=R9stG/lmXJdsXHGgKia+oTkvUI4izzLltEX1pw82UMgWBX3jOp4SYKyGSPeP/65vIbg8ObE+Pv/PU000ZJl0YndCG5mvIRdT3H/PBILDTauoRp4+YrHnXDG5epK09GXTNH1CrQdrHLj6so0+8bcCUNLh7XGSRUN5VSLxOt4KfbE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hds0sijd; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="hds0sijd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5A9BEC4CEF1; Fri, 24 Oct 2025 11:34:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761305669; bh=C2071/4y7/j52Jeu+ERq03SVVMZ5dIN9u1f1mb/b9vQ=; h=Date:From:To:Subject:In-Reply-To:References:Cc:From; b=hds0sijd3DpmsMZEdqENMgI9IkUzM1SysXUOE7+1iSLj3LZQowSCdwya7THigUfFN jCj6J3zgN7FDNy2936BUyuVb2acinCRajGsjPfkEnBVpmggk5F3AGlBPHyV1tZMKMS +a8P8ozie7oz7NLosPF2bPbIV//61MVzzMkVsN1RfBiaH8u9/ZRc7sDHc/NxpxLYTL VrJZBPR3347TWkt1m4xXZXabk+7cOQrYi6HSv8XuqkNJuEkH6f7O218k+iBn92f+0I tGi2Dw1pMnR/SacbDyl+BatQJMM6+pHyvtq5VapgyZn7Bhwkr+EZremykwk8sE7Xf6 oqJk4HDV9OvCQ== Message-ID: <51b0a361379b26ff14dd2f5b0aa4d6df@kernel.org> Date: Fri, 24 Oct 2025 11:34:26 +0000 From: "Maxime Ripard" To: "Barry Song" <21cnbao@gmail.com> Subject: Re: [PATCH v2] dma-buf: system_heap: use larger contiguous mappings instead of per-page mmap In-Reply-To: <20251021042022.47919-1-21cnbao@gmail.com> References: <20251021042022.47919-1-21cnbao@gmail.com> Cc: 21cnbao@gmail.com, Brian.Starkey@arm.com, benjamin.gaignard@collabora.com, christian.koenig@amd.com, dri-devel@lists.freedesktop.org, jstultz@google.com, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, sumit.semwal@linaro.org, tjmercier@google.com, v-songbaohua@oppo.com, zhengtangquan@oppo.com, "Maxime Ripard" Content-Transfer-Encoding: 7bit Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: On Tue, 21 Oct 2025 17:20:22 +1300, Barry Song wrote: > From: Barry Song > > 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 Thanks! Maxime