Date: Thu, 9 May 2002 05:46:43 -0700 From: David Schultz <dschultz@uclink.Berkeley.EDU> To: Dmitry Pryanishnikov <dmitry@atlantis.dp.ua> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: buffer size Message-ID: <20020509054643.A37350@HAL9000.wox.org> In-Reply-To: <20020508113620.K26619-100000@atlantis.dp.ua>; from dmitry@atlantis.dp.ua on Wed, May 08, 2002 at 11:41:56AM %2B0300 References: <20020508011556.A28420@HAL9000.wox.org> <20020508113620.K26619-100000@atlantis.dp.ua>
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Thus spake Dmitry Pryanishnikov <dmitry@atlantis.dp.ua>: > > > 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
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