Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp3676799imu; Mon, 28 Jan 2019 08:54:10 -0800 (PST) X-Google-Smtp-Source: ALg8bN5/8rstefl36u/LFKJaRR6OpuDiteXPfE1yQNPwMmBAmGjOr1H5hPlcySJDbWiyXW1Zhyiu X-Received: by 2002:a17:902:9b87:: with SMTP id y7mr22687459plp.336.1548694450305; Mon, 28 Jan 2019 08:54:10 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1548694450; cv=none; d=google.com; s=arc-20160816; b=ymUGB9JyAh+DhZeKlCe0GBG5vcSpNHsXU4Pu7rblR7oSh9Fi5Z+qePzd47B/QfD+gr shhnbBNE5Fs1Xw+KdVSo0NyWVGIyGL7qXpwImOLQfwoEEcBE10rCsbqnj0k+WZkyGnVc 5+rVlNwjXuINmchzlcD5cbvH8dfGVSpTPHV9JYCQtFnGFT1BDtgih5r+Z4coaL3aV712 ne1lUda+G/IBzt3TWBAs1VkJK2XYxQPkEG8SrvQF0HX/8IYmOX6ewz/J2RJoG4dYNM67 57WXJA83wOxYBBrEpA7kGB9dEQnIQ7kb3RwHhg7N1TJvZMHXd211kAEHfA0C3QG/oKXL 54AA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature; bh=gOkExBX+bndv/IE0g5ygRf8i06Rcpysb9VcG1seNSxs=; b=JNjjGUB+tSKO5X7E7Rb8LNr0XaMyPO8zwCIeqMWoQ7Y9yDeLrqrb9vCV94JfP03qhF CQjBQ0XBLL7w4d9TiZ2FdZr7PNdv5KmxN8kw1RDhzN8KXZeuyd85FNgulHWXarBNV2kM 2bLWkXT9FZWj+or+x1subNgyLcjN/XwPTluKyhkyV19BRnghM1wZruJFfqbiahNnVcdi kNVycb2AjtouNlwMZnvd6PzSEgKJojLUJT5mq9IJDqxto4UNMn4ukMy4Y9Jm+cJZ2OqH VNuXaM/bdREIYrV8+xuot9jdgWnCNDb4VFZ/vfP5EbDgBElSxlz6Fo/vhlCa5CTWfTrT wpRQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=FbL9fAsK; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id c4si1086845pfi.110.2019.01.28.08.53.54; Mon, 28 Jan 2019 08:54:10 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=FbL9fAsK; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388774AbfA1QxX (ORCPT + 99 others); Mon, 28 Jan 2019 11:53:23 -0500 Received: from mail.kernel.org ([198.145.29.99]:37764 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388410AbfA1QxV (ORCPT ); Mon, 28 Jan 2019 11:53:21 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3B9282173C; Mon, 28 Jan 2019 16:53:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548694400; bh=mIiFjEFbxvOCOd13hH2gfBHzs7USu5K2gZZrYFjCWK4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=FbL9fAsKrTecNMLjqZyWQNK048ai0fBFyZaVuzt+AOalxiAsIMZ6oNm/9B+r8UpLH hUnyPzEgBept5TtjkYiyH0CGhLLJ0eEa7654bfj565APq6qK6xPQyP+oxkS3i3a3// a6qrVt4sbILBF4nhJlgFE9uhWCs40BHwDfYH4zoY= Date: Mon, 28 Jan 2019 17:53:18 +0100 From: Greg KH To: Martin Kepplinger Cc: jslaby@suse.com, linux-kernel@vger.kernel.org, Manfred Schlaegl , Martin Kepplinger Subject: Re: [PATCH] tty: increase the default flip buffer limit to 2*640K Message-ID: <20190128165318.GA16213@kroah.com> References: <20190128163843.688-1-martink@posteo.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190128163843.688-1-martink@posteo.de> User-Agent: Mutt/1.11.2 (2019-01-07) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jan 28, 2019 at 05:38:43PM +0100, Martin Kepplinger wrote: > From: Manfred Schlaegl > > The default value for this was 64K. We increase this by a factor of > 10 to 640K to prevent data loss when using fast serial interfaces. What fast serial interface are you using where you run into this limit? > Since this value is only a maximum limit for allocation and isn't used > by default, this change has minimal effect on systems with slow interfaces. So what systems does it affect? > Signed-off-by: Manfred Schlaegl > Signed-off-by: Martin Kepplinger > --- > > Is there any reason for this _limit_ to be as small as 64K? Historical mostly from what I can tell. thanks, greg k-h