#43 Random application misbehaviour with PREEMPT (iBook1)

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nobody
Application (3)
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2003-10-28
2003-10-28
Christof Petig
No

2.6.0-test7 preempt causes mozilla, perl and g++ to
fail randomly (seldom) on load.

I tried PREEMPT for some time with 2.6 kernels and got
random application crashes (2.5.4x was much worse).
After some time (and since test9 was called production
ready) I suspected preempt to be the culprit (after the
hardware showed to work well with 2.4), turned it off
and 2.6.0-test9 is rock solid.

Actually the problem manifested rarely (about 6 times
during mozilla compilation) but I would not trust
valuable data to 2.6 preempt any more. No oops, no
hang, just strange random errors from the applications
[I found no really matching category/group - it's a
kernel problem!].

Summary: PREEMPT seems not ready for general use (at
least with iBook systems).

Discussion

  • Christof Petig
    Christof Petig
    2003-10-28

    Working .config (since PREEMPT is turned off)

     
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