Date: Sun, 23 Dec 2001 13:33:53 +1100 (EST) From: Bruce Evans <bde@zeta.org.au> To: Matt Dillon <dillon@FreeBSD.org> Cc: <cvs-committers@FreeBSD.org>, <cvs-all@FreeBSD.org> Subject: Re: cvs commit: src/sys/dev/sio sio.c Message-ID: <20011223132947.K10139-100000@gamplex.bde.org> In-Reply-To: <200112230048.fBN0mb624793@freefall.freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sat, 22 Dec 2001, Matt Dillon wrote: > dillon 2001/12/22 16:48:37 PST > > Modified files: > sys/dev/sio sio.c > Log: > This problem has been in the serial driver for years, and I occassionally > see people trip over it. Do not set the FIFO trigger to just before it > would otherwise overflow. Give it a little more slop so characters aren't > lost if the interrupt is delayed by other system activities. > > MFC maybe: 7 days > > Revision Changes Path > 1.354 +6 -1 src/sys/dev/sio/sio.c This setting is intentional. The default setting provides twice as much slop as the 8250 UARTs which the driver was designed to support on systems hundreds of times slower than current ones. Making it twice as large again doesn't help much. This commit will was not approved or even sent for review to the maintainer and will be backed out in a minute. Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20011223132947.K10139-100000>