lkml.org 
[lkml]   [2007]   [Aug]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: serial flow control appears broken
Paul Fulghum wrote:

> Lee Howard wrote:
>
>> And in repeat tests it is quite evident that IDE disk activity is,
>> indeed, at least part of the problem. As IDE disk activity increases
>> an increased amount of data coming in on the serial port goes missing.
>
>
> Lee, you mentioned 2.2.x kernels did not exhibit this problem.
>
> Was this on the same hardware you are currently testing?


Yes it was... except for the hard drive. I have different installs of
different operating systems on different hard drives. I change the hard
drive when switching between 2.2.5 and 2.6.5.

> Which 2.2.x version were you using?


The default 2.2.5 kernel that comes with RedHat 6.0.

> Was the 2.2.x serial driver also identifying the UART as a 16550A?


Yes it does.

> Can you get /proc/interrupts output
> from both the current setup and the 2.2.x setup?


Current (2.6.5):

CPU0
0: 14660696 XT-PIC timer
1: 8 XT-PIC i8042
2: 0 XT-PIC cascade
3: 1240314 XT-PIC serial
4: 778901 XT-PIC serial
8: 1 XT-PIC rtc
10: 111647 XT-PIC eth0
14: 221202 XT-PIC ide0
15: 34 XT-PIC ide1
NMI: 0
ERR: 5

(2.2.5):

CPU0
0: 5908 XT-PIC timer
1: 88 XT-PIC i8042
2: 0 XT-PIC cascade
8: 2 XT-PIC rtc
10: 38 XT-PIC Intel EtherExpress Pro 10/100 Ethernet
13: 1 XT-PIC fpu
14: 36637 XT-PIC ide0
15: 4 XT-PIC ide1
NMI: 0

Thanks,

Lee.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-08-05 02:03    [W:0.100 / U:0.196 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site