Hi,
> > I've got a followning problem.
> > I am trying to start a kernel thread. I do this by calling kernel_thread
> > from module's init function with CLONE_VM|CLONE_FS|CLONE_FILES.
> > (The same are used several times in kernel, CLONE_VM is always added
> inside
> > anyway). Then the thread calls daemonize(). It works, except that after
> second
> > ps I get a BUG in mmdrop, that is a check for destroying init_mm.
> >
> > The problem seems to be, that while kernel_thread() references the mm of
> > current process (insmod), the thread starts whith mm == &init_mm.
> > And exit_mm in daemonize is called on this, breaking it's ref-count.
> >
> > I test this on the user-mode port.
> > I am not able to trace down where the memory map gets changet. Please,
> tell
> > me what should I look for.
>
> there is a bug before 2.4.17-um9 or so in the uml code which i was able to
> trigger
> and traced enough for jdike to find the bug which was cauing the
> same thing to happen what version of uml are you running ?
Last time I used 2.4.17-um5, so the bug probably applies.
I will try latest patch and report if it persists.
--------------------------------------------------------------------------------
- Jan Hudec `Bulb' <bulb@ucw.cz>
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