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Re: AIX and Interix also do early PID recycling.
From: |
Michael Haubenwallner |
Subject: |
Re: AIX and Interix also do early PID recycling. |
Date: |
Wed, 25 Jul 2012 16:11:26 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:10.0.3) Gecko/20120327 Thunderbird/10.0.3 |
On 07/25/2012 02:14 PM, Greg Wooledge wrote:
> On Wed, Jul 25, 2012 at 09:59:28AM +0200, Michael Haubenwallner wrote:
>> OTOH, AFAICT, as long as a PID isn't waitpid()ed for, it isn't reused by
>> fork().
>> However, I'm unable to find that in the POSIX spec.
>
> A process that hasn't been waited for should become a zombie, which
> should be sufficient to prevent its PID being reused. Are you saying
> that AIX and Interix don't have zombies?
Nope. My thought was that bash eventually could postpone waiting for a specific
child PID until required by the driving shell script. That is: immediately for
synchronous childs to set $?, and on "wait" for asynchronous childs. The idea
was to render storing CHILD_MAX returnvalues obsolete.
However, I'm investigating why respecting CHILD_MAX by bash doesn't work when
the kernel starts reusing PIDs after CHILD_MAX different ones.
/haubi/
- AIX and Interix also do early PID recycling., michael . haubenwallner, 2012/07/24
- Re: AIX and Interix also do early PID recycling., Greg Wooledge, 2012/07/24
- Re: AIX and Interix also do early PID recycling., Michael Haubenwallner, 2012/07/24
- Re: AIX and Interix also do early PID recycling., Chet Ramey, 2012/07/24
- Re: AIX and Interix also do early PID recycling., Michael Haubenwallner, 2012/07/25
- Re: AIX and Interix also do early PID recycling., Greg Wooledge, 2012/07/25
- Re: AIX and Interix also do early PID recycling., Steven W. Orr, 2012/07/25
- Re: AIX and Interix also do early PID recycling.,
Michael Haubenwallner <=
- Re: AIX and Interix also do early PID recycling., Chet Ramey, 2012/07/25
- Re: AIX and Interix also do early PID recycling., Chet Ramey, 2012/07/25
- Re: AIX and Interix also do early PID recycling., Michael Haubenwallner, 2012/07/25
- Re: AIX and Interix also do early PID recycling., Steven W. Orr, 2012/07/25
- Re: AIX and Interix also do early PID recycling., Chet Ramey, 2012/07/25
- Re: AIX and Interix also do early PID recycling., Michael Haubenwallner, 2012/07/25
- Re: AIX and Interix also do early PID recycling., Roman Rakus, 2012/07/25
- Re: AIX and Interix also do early PID recycling., Chet Ramey, 2012/07/25
- Re: AIX and Interix also do early PID recycling., Roman Rakus, 2012/07/30
- Re: AIX and Interix also do early PID recycling., Chet Ramey, 2012/07/25