Re: Insanely high baud rates

2018-10-11 Thread H. Peter Anvin
On 10/11/18 2:40 PM, Theodore Y. Ts'o wrote: > On Thu, Oct 11, 2018 at 07:14:30AM -0700, h...@zytor.com wrote: >>> >>> I mean - what is the baud rate of a pty ? >> >> Whatever the master wants it to be... > > I think Alan's point is that it is highly unlikely you would be able > to push the

Re: Insanely high baud rates

2018-10-11 Thread H. Peter Anvin
On 10/11/18 2:40 PM, Theodore Y. Ts'o wrote: > On Thu, Oct 11, 2018 at 07:14:30AM -0700, h...@zytor.com wrote: >>> >>> I mean - what is the baud rate of a pty ? >> >> Whatever the master wants it to be... > > I think Alan's point is that it is highly unlikely you would be able > to push the

Re: Insanely high baud rates

2018-10-11 Thread Theodore Y. Ts'o
On Thu, Oct 11, 2018 at 07:14:30AM -0700, h...@zytor.com wrote: > > > >I mean - what is the baud rate of a pty ? > > Whatever the master wants it to be... I think Alan's point is that it is highly unlikely you would be able to push the equivalent of 4 gbps through a PTY layer. The TTY later was

Re: Insanely high baud rates

2018-10-11 Thread Theodore Y. Ts'o
On Thu, Oct 11, 2018 at 07:14:30AM -0700, h...@zytor.com wrote: > > > >I mean - what is the baud rate of a pty ? > > Whatever the master wants it to be... I think Alan's point is that it is highly unlikely you would be able to push the equivalent of 4 gbps through a PTY layer. The TTY later was

Re: Insanely high baud rates

2018-10-11 Thread Craig Milo Rogers
On 18.10.11, Alan Cox wrote: > I mean - what is the baud rate of a pty ? Solaris made the distinction between B0, which means pty hangup mode, and any other baud rate: https://docs.oracle.com/cd/E88353_01/html/E37851/pty-4d.html But... why not implement a pty bandwidth

Re: Insanely high baud rates

2018-10-11 Thread Craig Milo Rogers
On 18.10.11, Alan Cox wrote: > I mean - what is the baud rate of a pty ? Solaris made the distinction between B0, which means pty hangup mode, and any other baud rate: https://docs.oracle.com/cd/E88353_01/html/E37851/pty-4d.html But... why not implement a pty bandwidth

Re: Insanely high baud rates

2018-10-11 Thread H. Peter Anvin
On 10/11/18 12:36 PM, Craig Milo Rogers wrote: > On 18.10.11, Alan Cox wrote: >> I mean - what is the baud rate of a pty ? > > Solaris made the distinction between B0, which means pty hangup mode, > and any other baud rate: > > https://docs.oracle.com/cd/E88353_01/html/E37851/pty-4d.html

Re: Insanely high baud rates

2018-10-11 Thread H. Peter Anvin
On 10/11/18 12:36 PM, Craig Milo Rogers wrote: > On 18.10.11, Alan Cox wrote: >> I mean - what is the baud rate of a pty ? > > Solaris made the distinction between B0, which means pty hangup mode, > and any other baud rate: > > https://docs.oracle.com/cd/E88353_01/html/E37851/pty-4d.html

Re: Insanely high baud rates

2018-10-11 Thread hpa
On October 11, 2018 5:31:34 AM PDT, Alan Cox wrote: >> I'm mostly wondering if it is worth future-proofing for new >transports. It sounds like we can have a consensus on leaving the upper >4 bits of the speed fields reserved, but leave the details of >implementation for the future? > >It seems

Re: Insanely high baud rates

2018-10-11 Thread hpa
On October 11, 2018 5:31:34 AM PDT, Alan Cox wrote: >> I'm mostly wondering if it is worth future-proofing for new >transports. It sounds like we can have a consensus on leaving the upper >4 bits of the speed fields reserved, but leave the details of >implementation for the future? > >It seems

Re: Insanely high baud rates

2018-10-11 Thread Alan Cox
> I'm mostly wondering if it is worth future-proofing for new transports. It > sounds like we can have a consensus on leaving the upper 4 bits of the speed > fields reserved, but leave the details of implementation for the future? It seems reasonable, although I think the reality is that any

Re: Insanely high baud rates

2018-10-11 Thread Alan Cox
> I'm mostly wondering if it is worth future-proofing for new transports. It > sounds like we can have a consensus on leaving the upper 4 bits of the speed > fields reserved, but leave the details of implementation for the future? It seems reasonable, although I think the reality is that any

Re: Insanely high baud rates

2018-10-10 Thread hpa
On October 10, 2018 1:17:17 PM PDT, Alan Cox wrote: >On Tue, 9 Oct 2018 12:19:04 -0700 >"H. Peter Anvin" wrote: > >> [Resending to a wider audience] >> >> In trying to get the termios2 interface actually implemented in >glibc, >> the question came up if we will ever care about baud rates in

Re: Insanely high baud rates

2018-10-10 Thread hpa
On October 10, 2018 1:17:17 PM PDT, Alan Cox wrote: >On Tue, 9 Oct 2018 12:19:04 -0700 >"H. Peter Anvin" wrote: > >> [Resending to a wider audience] >> >> In trying to get the termios2 interface actually implemented in >glibc, >> the question came up if we will ever care about baud rates in

Re: Insanely high baud rates

2018-10-10 Thread Alan Cox
On Tue, 9 Oct 2018 12:19:04 -0700 "H. Peter Anvin" wrote: > [Resending to a wider audience] > > In trying to get the termios2 interface actually implemented in glibc, > the question came up if we will ever care about baud rates in excess of > 4 Gbps, even in the relatively remote future. Even

Re: Insanely high baud rates

2018-10-10 Thread Alan Cox
On Tue, 9 Oct 2018 12:19:04 -0700 "H. Peter Anvin" wrote: > [Resending to a wider audience] > > In trying to get the termios2 interface actually implemented in glibc, > the question came up if we will ever care about baud rates in excess of > 4 Gbps, even in the relatively remote future. Even

Re: Insanely high baud rates

2018-10-09 Thread H. Peter Anvin
On 10/09/18 12:51, Willy Tarreau wrote: > On Tue, Oct 09, 2018 at 12:19:04PM -0700, H. Peter Anvin wrote: >> [Resending to a wider audience] >> >> In trying to get the termios2 interface actually implemented in glibc, >> the question came up if we will ever care about baud rates in excess of >> 4

Re: Insanely high baud rates

2018-10-09 Thread H. Peter Anvin
On 10/09/18 12:51, Willy Tarreau wrote: > On Tue, Oct 09, 2018 at 12:19:04PM -0700, H. Peter Anvin wrote: >> [Resending to a wider audience] >> >> In trying to get the termios2 interface actually implemented in glibc, >> the question came up if we will ever care about baud rates in excess of >> 4

Re: Insanely high baud rates

2018-10-09 Thread Willy Tarreau
On Tue, Oct 09, 2018 at 12:19:04PM -0700, H. Peter Anvin wrote: > [Resending to a wider audience] > > In trying to get the termios2 interface actually implemented in glibc, > the question came up if we will ever care about baud rates in excess of > 4 Gbps, even in the relatively remote future. >

Re: Insanely high baud rates

2018-10-09 Thread Willy Tarreau
On Tue, Oct 09, 2018 at 12:19:04PM -0700, H. Peter Anvin wrote: > [Resending to a wider audience] > > In trying to get the termios2 interface actually implemented in glibc, > the question came up if we will ever care about baud rates in excess of > 4 Gbps, even in the relatively remote future. >

Insanely high baud rates

2018-10-09 Thread H. Peter Anvin
[Resending to a wider audience] In trying to get the termios2 interface actually implemented in glibc, the question came up if we will ever care about baud rates in excess of 4 Gbps, even in the relatively remote future. If this is something we care about *at all*, I would like to suggest that

Insanely high baud rates

2018-10-09 Thread H. Peter Anvin
[Resending to a wider audience] In trying to get the termios2 interface actually implemented in glibc, the question came up if we will ever care about baud rates in excess of 4 Gbps, even in the relatively remote future. If this is something we care about *at all*, I would like to suggest that