Re: 2.1.129 scheduling problem?

Michael H. Warfield (mhw@wittsend.com)
Tue, 24 Nov 1998 11:38:19 -0500 (EST)


Sang Woo Kang enscribed thusly:
> Hello all,

> There are a few things I found strange... First of all, my environment
> is Slackware 3.5 (libc-5.4.46, egcs-1.0.3a, all standard stuffs comes with
> the dist.). Kernels are all UP and monolithic.

> Problem 1:
> pRoblem with dpms and Kernel 2.0.36 & earlier : When the monitor goes into
> doze mode, it never wakes up... reminds me of sleeping beauty. The only
> solution is to press Ctrl+Alt+Del. The system is rock solid if I disable
> dpms. I don't want to blame my M/B there was no problem such as this with
> 2.0.32. Could it be a problem with X11? I don't have a clue....

> Problem 2:
> With linux-2.1.128 & 129, when I try to execute any program at a random point,
> the system almost become dead. Here's a chronological sequence of events:
>
> 0) I was running netscape(4.08) and a couple of shells on X
> 1) the shell (tcsh 6.07.02) gets blocked when I tried to execute a
> command.
> 2) suddenly system load gradually and rapidly increases
> 3) I still can safely exit other programs such as X, netscape, slrn,
> et tecera
> 4) I can go back to the console safely, but even trying to execute 'ls'
> takes roughly 20-30 second (till it gets executed, the shell
> remains blocked. Ctrl-C or Ctrl-Z are not serviced).
> 5) only cure was to reboot using SysRq commands (Thank God!)

> The last time I has experienced such behavior was 2.1.128+scheduling patch
> I obtained from the linux-kernel mailing list. At that time, I could not
> even login as root because everything I tried to do are simply blocked and
> there was quite a delay before it gets executed.

> Can someone bother to explain what this really mean?

Problem has earned the name 127/128 flu.

Fixed in 2.1.129ac2 (but not plain 2.1.129) and later.

> -Sang Kang

Mike

-- 
 Michael H. Warfield    |  (770) 985-6132   |  mhw@WittsEnd.com
  (The Mad Wizard)      |  (770) 925-8248   |  http://www.wittsend.com/mhw/
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