[Bug 76101] New: [TRIVIAL] PTHREAD_CREATE(3): EAGAIN and pid_max

[Bug 76101] New: [TRIVIAL] PTHREAD_CREATE(3): EAGAIN and pid_max

[bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r]

https://bugzilla.kernel.org/show_bug.cgi?id=76101

            Bug ID: 76101
           Summary: [TRIVIAL] PTHREAD_CREATE(3): EAGAIN and pid_max
           Product: Documentation
           Version: unspecified
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P1
         Component: man-pages
          Assignee: documentation_man-pages-ztI5WcYan/vQLgFONoPN62D2FQJk+8+b@public.gmane.org
          Reporter: carstengrohmann-Mmb7MZpHnFY@public.gmane.org
        Regression: No

Hi,

The system-wide limit on the number of threads can also reached by a small
value in /proc/sys/kernel/pid_max. E.g. RHEL5 and RHEL6 systems uses a default
of 32768 in pid_max probably for compatibility with 32bit applications.

This causes an EAGAIN also if the number of threads is significant lower than
thread-max or RLIMIT_NPROC.

Please extent the EAGAIN statement to reflect pid_max too.

Thanks,
Carsten

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Re: [Bug 76101] New: [TRIVIAL] PTHREAD_CREATE(3): EAGAIN and pid_max

[Michael Kerrisk (man-pages)]

On 05/13/2014 07:22 PM, bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r@public.gmane.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=76101
> 
>             Bug ID: 76101
>            Summary: [TRIVIAL] PTHREAD_CREATE(3): EAGAIN and pid_max
>            Product: Documentation
>            Version: unspecified
>           Hardware: All
>                 OS: Linux
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: man-pages
>           Assignee: documentation_man-pages-ztI5WcYan/vQLgFONoPN62D2FQJk+8+b@public.gmane.org
>           Reporter: carstengrohmann-Mmb7MZpHnFY@public.gmane.org
>         Regression: No
> 
> Hi,
> 
> The system-wide limit on the number of threads can also reached by a small
> value in /proc/sys/kernel/pid_max. E.g. RHEL5 and RHEL6 systems uses a default
> of 32768 in pid_max probably for compatibility with 32bit applications.
> 
> This causes an EAGAIN also if the number of threads is significant lower than
> thread-max or RLIMIT_NPROC.
> 
> Please extent the EAGAIN statement to reflect pid_max too.

Hello Carsten.

Thanks for the report. I've added pid_max to the list 
of causes for EAGAIN in pthread_create(3). (And I've made
the fork(2) text match that in pthread_create(3) as well.).

Cheers,

Michael



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Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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[Bug 76101] [TRIVIAL] PTHREAD_CREATE(3): EAGAIN and pid_max

[bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r]

https://bugzilla.kernel.org/show_bug.cgi?id=76101

--- Comment #1 from Michael Kerrisk <mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
On 05/13/2014 07:22 PM, bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r@public.gmane.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=76101
> 
>             Bug ID: 76101
>            Summary: [TRIVIAL] PTHREAD_CREATE(3): EAGAIN and pid_max
>            Product: Documentation
>            Version: unspecified
>           Hardware: All
>                 OS: Linux
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: man-pages
>           Assignee: documentation_man-pages-ztI5WcYan/vQLgFONoPN62D2FQJk+8+b@public.gmane.org
>           Reporter: carstengrohmann-Mmb7MZpHnFY@public.gmane.org
>         Regression: No
> 
> Hi,
> 
> The system-wide limit on the number of threads can also reached by a small
> value in /proc/sys/kernel/pid_max. E.g. RHEL5 and RHEL6 systems uses a default
> of 32768 in pid_max probably for compatibility with 32bit applications.
> 
> This causes an EAGAIN also if the number of threads is significant lower than
> thread-max or RLIMIT_NPROC.
> 
> Please extent the EAGAIN statement to reflect pid_max too.

Hello Carsten.

Thanks for the report. I've added pid_max to the list 
of causes for EAGAIN in pthread_create(3). (And I've made
the fork(2) text match that in pthread_create(3) as well.).

Cheers,

Michael

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[Bug 76101] [TRIVIAL] PTHREAD_CREATE(3): EAGAIN and pid_max

[bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r]

https://bugzilla.kernel.org/show_bug.cgi?id=76101

Michael Kerrisk <mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
         Resolution|---                         |CODE_FIX

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