From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4EABAC43458 for ; Sat, 11 Jul 2026 14:49:00 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9581E10E1C1; Sat, 11 Jul 2026 14:48:59 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=collabora.com header.i=robert.mader@collabora.com header.b="lFe06t0V"; dkim-atps=neutral Received: from sender4-op-o11.zoho.com (sender4-op-o11.zoho.com [136.143.188.11]) by gabe.freedesktop.org (Postfix) with ESMTPS id E42B310E1C1 for ; Sat, 11 Jul 2026 14:48:58 +0000 (UTC) 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> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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