Re: "ps ax" shows init [

[phil-linux-kernel@ipal.net (Phil Howard)]

Miquel van Smoorenburg wrote:

> In article <Pine.LNX.4.10.10111071747430.31120-100000@ares.sot.com>,
> Yaroslav Popovitch  <yp@sot.com> wrote:
> >doing "ps ax" get such msg for kernel-2.4.9:
> >That is the same for kernel-2.4.12.Sometimes it is shown as it should be.
> >Is this a bug of kernel? It seems to be..
> >
> >  PID TTY      STAT   TIME COMMAND
> >    1 ?        S      0:06 init [    
> 
> It's because init doesn't have enough space in argv[] to change it's
> process title. There are a number of causes for this, one indirect
> one is pressing 'enter' at the 'LILO boot: ' prompt.

Perhaps a way around this frequent problem is to make execve() always
reserve a certain minimum amount of space in argv[] even if it is not
filled in with anything.  Then instead a "brick wall" being set at
the end of the space originally used, it can be set at max(space used,
minimum reserved).  This is still userland space, right?  What would
be a reasonable figure for minimum reserved?  Or does ld-linux go
grabbing space right after the end of argv[]?

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