From owner-freebsd-stable Thu May 9 5:46:20 2002 Delivered-To: freebsd-stable@freebsd.org Received: from HAL9000.wox.org (12-232-222-90.client.attbi.com [12.232.222.90]) by hub.freebsd.org (Postfix) with ESMTP id AF43337B415 for ; Thu, 9 May 2002 05:46:12 -0700 (PDT) Received: (from das@localhost) by HAL9000.wox.org (8.11.6/8.11.6) id g49CkhZ37442; Thu, 9 May 2002 05:46:43 -0700 (PDT) (envelope-from das) Date: Thu, 9 May 2002 05:46:43 -0700 From: David Schultz To: Dmitry Pryanishnikov Cc: freebsd-stable@FreeBSD.ORG Subject: Re: buffer size Message-ID: <20020509054643.A37350@HAL9000.wox.org> Mail-Followup-To: Dmitry Pryanishnikov , freebsd-stable@FreeBSD.ORG References: <20020508011556.A28420@HAL9000.wox.org> <20020508113620.K26619-100000@atlantis.dp.ua> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20020508113620.K26619-100000@atlantis.dp.ua>; from dmitry@atlantis.dp.ua on Wed, May 08, 2002 at 11:41:56AM +0300 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Thus spake Dmitry Pryanishnikov : > > > More specifically, it copies no more than 1024 characters (tested > > > both on 4.2-RELEASE and 4.4-RELEASE (fill one of your virtual > > > consoles with text, then select all screen, then switch to another > > > console, start "cat >file" and paste the text, then press ^D twice - > > > you'll see that file size will be no more than 1024). > > > > Yep, it's a termios limitation, not a syscons limitation. I suspect > > that there's a way to get syscons to stop sending data when the input > > queue is full, but it can't be that easy or someone who understands it > > would have fixed it by now. > > Aha, so-called "typeahead buffer"? Is it possible to increase it's size to, > say, 4K (to fit 132x25 screen)? If yes, what #defines one should change? What > negative effects could it give? Looks like you need to change the #define TTYHOG in sys/tty.h, although I haven't actually tried it and I have no idea what the side effects might be. Caveat emptor. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message