Re: Elks freeze after login [machine config]

[Harry Kalogirou <harkal@gmx.net>]

Την Παρ, 02-08-2002 στις 22:02, ο/η Riley Williams έγραψε:
> Hi Harry.
> 
> >> I'm using the disk images downloaded from sf and seems to be the
> >> 0.1.0 version. This compaq has :
> >> - a 20286
> >> - a 20287 (but I'm not sure, I've not used this computer since
> >>   1991), I will test for it
> >> - 1,6 MB of ram
> >> - a 40 MB IDE disk
> >> - two serial ports
> >>
> >> The two serial ports are detected at boot time as
> >>
> >> ttys0 at 0x3F8 (irq = 4) with 16450
> >> ttys1 at 0x2F8 (irq = 3) with 16450
> >>
> >> and lp0 at 0x3BC
> 
> > ELKS will run like the wind on it...
> 
> ...providing the 16450 is compatible with the 8250 code we have in
> ELKS. Memory says that Linux does some extra configuration for the
> serial ports when the chip is a 16450 rather than an 8250, and it's
> quite possible we're being caught by this.

No ELKS works fine with the 16450 UART.

> I can't test this as my T2000 testbed is detected as having 8250
> serial ports, not 16450's, so this could easily be untested behaviour.

Mine is a 16450.

> 
> Could you do some tests with it Harry?
> 
>  1. Is your serial port an 8250, 16450 or what?

As I said before it is an 16450.
 
>  2. Does the CSLIP also work at speeds higher than 9600 BPS?
>     Here's a table of valid integral speeds and I'd love to
>     know which is the highest that actually works for you.
>

The rule is : If your serial works for some speed, CSLIP will work for
it too. 

So it is "theoriticaly" posible to use 115200 if you have an 16450. The
problem is that the interupt handler is heavy in ELKS so the interupts
will starve the CPU. 

9600 is the highest speed I can have on my 8086. On a 286 I once tried
at the university (I got it online as a web server if you remember)
higher speeds were posible.
 
> 
> I will add that the 8250 is only specified as "below 19,200 BPS" and the
> 14550 is specified as "up to 28,800 BPS" but that doesn't mean that they
> won't work faster than specified.
> 
> > The root partition is around 30MB and I have a 1MB swap partition.
> > I'm also running on it constanly a web server (for the fun of it,
> > since with swap we don't have memory shortage problems), serving a
> > copy of the ELKS web site. I also use the web server to get files I
> > need from it. To get files to the ELKS machine I use urlget.
> 
> > It is almost eye-wetting to fire an attack of http requests on it
> > and see the little 8086 starting to swap-out some of the vi's and
> > shells running on the 3 consoles, to make room for the httpd's
> > serving the pages.
> 
> Any chance you can share your httpd configuration (sans any passwords or
> the like) ???

The httpd is very simple and needs no configuration. Just run it and
place the pages under /usr/lib/httpd

> > (Note that with shared memory every new httpd takes only 4kb, use
> > chmem for this since the linker gives it a 32KB data segment#)
> 
> Perhaps that could be made part of the compilation setup in the relevant
> Makefile ???

Yes that is posible.

Harry


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