Dmitry Adamushko wrote:
>>when I use fork() instead of vfork() I have the freeze again.
>>I.e. using vfork() it works fine, using fork() freezes the system.
>
>
> Gilles: is this not the end point of the fork vs. vfork epopee ? :)
Right. I am currently using linuxthreads pthread implementation, that is
why I had a look at it.
>
> Anyway, it looks your remarks about fork() make sense. But if it's
> true indeed, a more nicer solution would be required.
The simple solution is to only use fork in non time-critical part of
code (like initializations and cleanup) and to fault the pages after the
fork. It make sense to limit fork use to non time-critical code, I mean,
I would already not recommend to create threads in time-critical code,
creating a process is even worse.
A more complex solution would be to really duplicate the mlocked pages
at fork time.
--
Gilles Chanteperdrix
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