linux-kernel - Re: fork: Resource temporarily unavailable / cant start new threads

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Date:	Wed, 21 May 2008 13:28:45 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	mark <markkicks@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: fork: Resource temporarily unavailable / cant start new threads

On Tue, 20 May 2008 11:26:47 -0700 mark wrote:

> I upgraded to 2.6.25.3-18.fc9.x86_64 fedora core 9, now I get this
> error when I try to login to the box, kill a pr start a python app, or
> do anything on a regular basis.
> 
> fork: Resource temporarily unavailable
> 
> I have over 10GB RAM free, and zero swap spaced used. The box is a
> dual quad core Intel Xeon 5405 with 16GB RAM.
> 
> There is no error message in /var/log/messages or dmesg ...
> how do I identify the problem?
> thanks!
> 
> uname -a
> Linux XXX 2.6.25.3-18.fc9.x86_64 #1 SMP Tue May 13 04:54:47 EDT 2008
> x86_64 x86_64 x86_64 GNU/Linux
> 
> 
> free -m
>             total       used       free     shared    buffers     cached
> Mem:         16086       3189      12896          0         42        666
> -/+ buffers/cache:       2481      13605
> Swap:         1983          0       1983
> 
> 
> have only 505 processes running
> ps aux | wc -l
> 505
> 
> 
> uptime
>  11:24:15 up 39 min,  1 user,  load average: 3.54, 3.47, 2.87
> 
> ulimit -a
> core file size          (blocks, -c) 0
> data seg size           (kbytes, -d) unlimited
> scheduling priority             (-e) 0
> file size               (blocks, -f) unlimited
> pending signals                 (-i) 137216
> max locked memory       (kbytes, -l) 32
> max memory size         (kbytes, -m) unlimited
> open files                      (-n) 32768
> pipe size            (512 bytes, -p) 8
> POSIX message queues     (bytes, -q) 819200
> real-time priority              (-r) 0
> stack size              (kbytes, -s) 10240
> cpu time               (seconds, -t) unlimited
> max user processes              (-u) 1024
> virtual memory          (kbytes, -v) unlimited
> file locks                      (-x) unlimited

Hi,

The only place that fork() returns EAGAIN is for number of
processes being >= its limit.  Does this user already have >= 1024
processes?


---
~Randy
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