Date: Thu, 29 Jun 2000 00:14:50 -0700 From: Mike Smith <msmith@freebsd.org> To: Warner Losh <imp@village.org> Cc: freebsd-mobile@FreeBSD.ORG Subject: Re: Trust FM560LKI modem force 8250 Message-ID: <200006290714.AAA01617@mass.osd.bsdi.com> In-Reply-To: Your message of "Thu, 29 Jun 2000 00:33:08 MDT." <200006290633.AAA83340@harmony.village.org>
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> In message <200006290635.XAA01404@mass.osd.bsdi.com> Mike Smith writes: > : > In message <3957C665.272BEC3A@genprofile.com> David Bauer writes: > : > : My sio.c is not exactly the same (4.0-RELEASE) but I found the two > : > : places and changed it. But unfortunately this does not solve the > : > : problem. The interrupt buffer overflows are still there. > : > : Any other ideas ? > : > > : > The problem isn't with your FIFO. Like I said before the problem is > : > with your application. At least that's usually what the interrupt > : > level problems mean. > : > : No, that's tty-level overflows. See sio(4). > > Ah. It is a possible problem in the bottom half of the driver. I got > confused. I wonder what the problem could be... Something is blocking splsoftty() for a long time, I think, so that the interrupt-level buffer is not drained by the code that feeds the tty subsystem. The entire sio(4) architecture is extremely delay-sensitive. -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org \\ and he'll hate you for a lifetime. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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