Messages in this thread | | | Date | Fri, 3 Sep 1999 23:24:45 -0700 (PDT) | From | Prashant TR <> | Subject | PROBLEM: Kernel Hangs - It really does. |
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PLEASE NOTE THAT I'M NOT A PART OF THE KERNEL NEWSGROUP. KINDLY DIRECT REPLIES TO prashant_tr@yahoo.com ITSELF.
Thanks for the details about the "fork bomb". (Ref: Prashant TR - August 31st, 1999).
I HAVE TWO PROBLEMS/BUGS:
PROBLEM/BUG 1: (INIT 7, 8 AND 9)
I type init 7 and the system doesn't shutdown properly. This is true with init 8 and init 9 as well. Is this a bug ? If yes, can something be done about that ?
PROBLEM/BUG 2: (KERNEL CRASH)
I found a way to reproduce the crash which I mentioned on August 31st, 1999. I was playing DOOM and the system crashed. Well, nothing worked. I even typed "init 0" blindly thinking that the screen was in the SVGA mode but the console was actually active. But it wasn't so. The SCROLL LOCK turned on and I could not do anything about it.
I have a strange feeling that it has something to do with the SCROLL LOCK or the keyboard handling.
HERE'S HOW I REPRODUCE THE CRASH. IT'S VERY SIMPLE.
I really don't know how many versions of DOOM you have for Linux. But the one I'm talking about is the one that appeared with the Red Hat Linux 6.0 on the CHIP Special Magazine (August Edition). Maybe, you could get it from http://www.chip-india.com. The sources for DOOM are available on the same CD, so I guess that should help you fix the bug more easily.
Basically, I run the file "rundoom". "rundoom" itself spawns several processes and finally "doom" comes up.
I then switch to another console where I login as "root". I say "ps -a" which gives me the PID of "rundoom". I then say "kill <pid of rundoom>" and then switch to the console where I'm playing doom. The moment I press the "up arrow", the system hangs. And that's it. I only have to reset my system - everything else fails. This doesn't happen if I kill another process "sdoom" which is spawned by the program.
I mentioned in my previous mail that it was probably SVGALIB that caused the problem. But, could it be a bug in the CPU itself ? - I have no idea. I can only reproduce the bug at present.
If this doesn't crash your system, I can get you a copy of the doom executables, except the WAD file which is too massive. I will put them up on my website if requested so that you could download them. If any other details regarding this are needed, please send me a mail. I kindly request you to wait for my response if needed as. It may take two to three days as I don't have a net connection myself.
HERE'S MY CONFIGURATION:
Kernel Version: 2.2.5-15 Kernel Modules: 2.2.121 Gnu C: egcs-2.91.66 Binutils: 2.9.1.0.23 Linux C library: 2.1.1 Dynamic Link Loader: ldd (GNU libc) 2.1.1 Procops: 2.0.2 Mount: 2.9o Net tools: (1999-01-31) Kbd: [option...] Sh-utils: 1.16 Modules loaded: nls_iso8859-1 nls_cp437 vfat vfat opl3 sb uart401 sound soundlow soundcore
My hardware:
CPU: Intel Pentium (P54C) with F00F bug (stepping 0Ch). Submodel 2 CPUID value: 0000052C Feature flags: 000001BF Sound card: Creative SB16 PnP Mouse: Microsoft Serial Mouse
If this bug is fixed or seems genuine, please tell me about it.
AGAIN, PLEASE NOTE THAT I'M NOT A PART OF THE KERNEL NEWSGROUP. KINDLY DIRECT REPLIES TO prashant_tr@yahoo.com ITSELF.
Thank you, Prashant TR
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