Messages in this thread | | | Date | Sat, 04 Aug 2007 17:00:08 -0700 | From | Lee Howard <> | Subject | Re: serial flow control appears broken |
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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,
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