> Even with a tgid you would need some way to avoid its counter wrapping
> and getting reused.
While in theory the pid that is used for tgid should never die while the
thread group exists, this case needs to be handled for thread groups in
general. The number shouldn't be re-used for a pid as long as it's in use
as a tgid.
> Also gtop should display correct results even with the programs
> that don't use CLONE_THREAD.
Are there any programs that use CLONE_VM and not CLONE_THREAD?
Actually I think we should make tgid visible in /proc in general because
it's a useful thing to know, whether it's the right mechanism for gtop or
not. I'll work up a patch.
Dave McCracken IBM Linux Base Kernel Team 1-512-838-3059
email@example.com T/L 678-3059
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