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SubjectRe: [PATCH] Send exit code through for taskstats.ac_exitcode
Date
On Mon Aug 20 20:44:13 2007, balbir@linux.vnet.ibm.com wrote:
>
> Jonathan Lim wrote:
> > taskstats.ac_exitcode is assigned to task_struct.exit_code in
> > bacct_add_tsk() through the following kernel function calls:
> >
> > do_exit()
> > taskstats_exit_send()
> > fill_pid()
> > bacct_add_tsk()
> >
> > The problem is that in do_exit(), task_struct.exit_code is set to 'code'
> > only after taskstats_exit_send() has been called. So we need to send
> > 'code' through to bacct_add_tsk().
>
> Hi, Jonathan,
>
> The patches look like a step in the right direction, I would suggest an
> alternate implementation
>
> Why can't we assign tsk->exit_code to code earlier? Can we not move up the
> assignment to before taskstats_exit()? Wouldn't that be much simpler?

Hi Balbir,

That was what I wanted to do at first, but there was some concern over whether
it would affect any of the intervening function calls. If there's no
particular reason why the tsk->exit_code assignment is placed where it's at
now, then yes, I would much rather move it to before taskstats_exit().

I looked at the following functions involving tsk:

exit_mm
mm_release
deactivate_mm
exit_sem
__exit_files
__exit_fs
cpuset_exit
exit_keys

and don't see anything that setting exit_code would affect. What do you think?

Jonathan
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