Messages in this thread |  | | Date | Tue, 12 Dec 2000 19:17:19 -0700 | From | "Jeff V. Merkey" <> | Subject | Re: Signal 11 - the continuing saga |
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On Wed, Dec 13, 2000 at 09:22:55AM +0900, Rainer Mager wrote: > Hi again, > > Ok, I just upgraded to 2.4.0test12 (although I don't think there was any > work in 12 that directly addresses this signal 11 problem). When compiling > the new kernel I chose to disable AGPGart and RDM as suggested by > davej@suse.de. I will report later if this makes any difference. > > On another, possibly related note, I'm getting some really weird behavior > with a Java program. The only reason I mention it here is because it dies > with our old friend Signal 11. Anyway, please bear with the description > below. > I have a tiny bash script that launches a Java swing app. If I run my > script from an xterm (or gnome-terminal or whatever) then it starts up fine. > If, however, I try to launch it from my gnome taskbar's menu then it dies > with signal 11 (the Java log is available upon request). This seems to be > 100% consistent, since I noticed it yesterday, even across reboots. > Interestingly, the same behavior occurs if I try to run the program from > withis JBuilder 4. > So, is this related to the larger signal 11 problems?
There's a corruption bug in the page cache somewhere, and it's 100% reproducable. Finding it will be tough....
> > > What else can I do regarding these issues to help fix it? Would a core dump > help anyone? I'd really like to contribute somehow but I need some > direction. > > > --Rainer > > > From: CMA [mailto:cma@mclink.it] > > Did you already try to selectively disable L1 and L2 caches (if > > your box has both) and see what happens? > > Anyone know how to do this?
Usually this is performed in the BIOS setup. You can also disable L1 with a sequence of instructions that write to the CR0 register on intel and flip a bit, but in doing this you have to execute a WBINV (write back invalidate) instruction to flush out the cache. BIOS setup is probably simpler. Disabling Level I will make the machine slower than mollasses, BTW, and if this bug is race related (they always are) it won't help much in running it down.
Jeff
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