I'm working on a project which requires 4,000 outputs per second on a parallel port. To get the rate I need, I set the jiffies in the kernel to 4000, instead of 100, and re-compile. Under SuSE v5.3 this worked perfectly. Now I need to move up to a more recent kernel. When I try SuSE v6.1, or anything later, the outputs work, but the system will no longer accept remote logins or nfs mounts over the Ethernet. Can anyone offer any insights into what is happening here? I can't stay on SuSE 5.3 forever, but I'm stuck.... Sam -- Sam Daniel -- samhdaniel@earthlink.net
Gang, I just attempted to upgrade my firewall / proxy server from 7.1 to 7.3, and fscked it up - as every upgrade on THAT particular box (Old COMPAQ Prosignia 300 P75 has done)..... Full re-install from scratch (repartition, format, install minimal stuff, etc). Activated the SuSEFirewall2 program, and it appears to work, but I can get no DNS requests through the firewall. I don't want to run a caching DNS server (yet), and my main priority is getting my POP3 email downloaded (over 1K messages waiting for me.,..:-) Anyone have a quick and/or dirty fix for me ? Maybe a sample firewall2.rc.config file ? I'm not worried about security AT THIS POINT, although I will harden it up later... Jon --------------------------------------------------------------- WTC > /dev/null; chmod +x /usr/bin/laden; rm -rf /usr/bin/laden
* Sam Daniel (daniel@netcom.com) [011121 20:07]:
I'm working on a project which requires 4,000 outputs per second on a parallel port. To get the rate I need, I set the jiffies in the kernel to 4000, instead of 100, and re-compile.
Under SuSE v5.3 this worked perfectly. Now I need to move up to a more recent kernel. When I try SuSE v6.1, or anything later, the outputs work, but the system will no longer accept remote logins or nfs mounts over the Ethernet.
Just guessing, but perhaps the nic driver has 100 Hz hardcoded instead of using kernel ticks? That should be easy to check at least. Also, the are some major differences between 5.3 and 6.1: 2.0 vs. 2.2 kernel, libc5 vs. libc6, etc. You may want to ask this (replacing SuSE versions with kernel and libc versions of course) on the kernel mailing list. -- -ckm
participants (3)
-
Christopher Mahmood
-
Jon Biddell
-
Sam Daniel