From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sender4-op-o11.zoho.com (sender4-op-o11.zoho.com [136.143.188.11]) (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 DB66B28136F; Sat, 11 Jul 2026 14:49:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.11 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783781348; cv=pass; b=Sx7M46Ep01AfLnJK+2+c9dWZeRrvXyODSgAdeGEIxe6Oy1nM60wLa4vVefpHfGPSnvTaF5rPzTc/MPG8Gpe+e1jRQWnPm6BJC9aZ4vMFOEHnROdESwYtwkXwVlql2L8RUH869Wm47r/kjqSCY/wFOXKb1rTKnU9fVEBaK+bcGME= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783781348; c=relaxed/simple; bh=64xmhQig0YSiaK7xERCHA2H1HKG3glwpBWzho00/fXs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=N9Gv86rzi9ZUtH5xsvcfGhAZIthVr+LhRIdFpf8pnIioLYYhNv8/iRXGTX81FOwB4+PDdlZo0UPCnn2UrAuB8XV04cLF9a465usrZlHS5JdlaJuSZryUik6NtqemnycWCxx16D3NlePn5rtTCOU/nAV+Ad/u552PT+fx8T7sOgs= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (1024-bit key) header.d=collabora.com header.i=robert.mader@collabora.com header.b=lFe06t0V; arc=pass smtp.client-ip=136.143.188.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=collabora.com header.i=robert.mader@collabora.com header.b="lFe06t0V" ARC-Seal: i=1; a=rsa-sha256; t=1783781337; cv=none; d=zohomail.com; s=zohoarc; b=Pj8aR3IrKz+/CtebXwpLpunMYcMVL0mBNT1XAIp10WtYHkaOj8JX5sIXHS+WapMYXd3i3phiX83zHGUI6NXCsyAjZeC/+DIGbMXCiv2RTF3e/G0+PAwCwUdQUy4OHryCspfM443MTNW875ZKwBS4W+GjTWIeuo5pwRKafSDoFbc= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1783781337; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=8EhoijJuAVpKhH0B/9K0NROY2MQn/U8qlWzqclSATrk=; b=VEtw4m1/C/z+o3/zqtg70bZY5pqWW581LCIzm202l3ducVlq5xlGUHcSKFPjk+q1Ccylq+obuSC72363W6uk/8uvEWjrRDtRzrz5Lv2qhUVt2rqIIfbYeVrPJKjqZPY8dHQ8UU48iq0gep7c0Zo8pWsOBg8idEtSfJ9kIackBrU= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=robert.mader@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1783781336; s=zohomail; d=collabora.com; i=robert.mader@collabora.com; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:In-Reply-To:References:MIME-Version:Content-Transfer-Encoding:Message-Id:Reply-To; bh=8EhoijJuAVpKhH0B/9K0NROY2MQn/U8qlWzqclSATrk=; b=lFe06t0VSWW7qAZWgQqe49gBXNN6/gxc/dfXhAFhRuvDeHfPoWcol7AAhZGIoIs4 q1rBuF02J43wuAdbflnunKCaHyUV92ULV8yjVMdef5k7okwidKSKSO8lik4HxwrFxcu CCkpCU4SYD+6HJwUnLyRIFMxXdQGpFDNCURiPU18= Received: by mx.zohomail.com with SMTPS id 1783781333885846.2310772290999; Sat, 11 Jul 2026 07:48:53 -0700 (PDT) From: Robert Mader To: dri-devel@lists.freedesktop.org Cc: Robert Mader , Sumit Semwal , =?UTF-8?q?Christian=20K=C3=B6nig?= , Gerd Hoffmann , Vivek Kasireddy , linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 2/2] dma-buf/udmabuf: Increase default size limit to 256MB Date: Sat, 11 Jul 2026 16:48:13 +0200 Message-ID: <20260711144814.8205-2-robert.mader@collabora.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260711144814.8205-1-robert.mader@collabora.com> References: <20260711144814.8205-1-robert.mader@collabora.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit While there does not seem to be a particularly strong reason to have a size limit for udmabufs in the first place, raising the limit moderatly to 256MB is enough to avoid hitting the limit in increasingly common use-cases - notably allocating video buffers for 8K resolutions. Signed-off-by: Robert Mader --- drivers/dma-buf/Kconfig | 4 ++-- drivers/dma-buf/udmabuf.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/dma-buf/Kconfig b/drivers/dma-buf/Kconfig index 35f0779cdc80..0e7f5dc978e2 100644 --- a/drivers/dma-buf/Kconfig +++ b/drivers/dma-buf/Kconfig @@ -42,9 +42,9 @@ config UDMABUF config UDMABUF_SIZE_LIMIT_MBYTES int "Size limit in Mega Bytes" - default 64 + default 256 help - Maximum size of a udmabuf, in megabytes. Default is 64. + Maximum size of a udmabuf, in megabytes. Default is 256. config DMABUF_DEBUG bool "DMA-BUF debug checks" diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c index a83153326362..c7649a04b865 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -23,10 +23,10 @@ MODULE_PARM_DESC(list_limit, "udmabuf_create_list->count limit. Default is 1024. #ifdef CONFIG_UDMABUF_SIZE_LIMIT_MBYTES static int size_limit_mb = CONFIG_UDMABUF_SIZE_LIMIT_MBYTES; #else -static int size_limit_mb = 64; +static int size_limit_mb = 256; #endif module_param(size_limit_mb, int, 0644); -MODULE_PARM_DESC(size_limit_mb, "Max size of a dmabuf, in megabytes. Default is 64."); +MODULE_PARM_DESC(size_limit_mb, "Max size of a dmabuf, in megabytes. Default is 256."); struct udmabuf { pgoff_t pagecount; -- 2.55.0