Re: mprotect() failed: Cannot allocate memory

[PaweÅ Sikora <pluto at agmk dot net>]

Dnia 21-04-2010 o 13:16:50 Peter Zijlstra <peterz@infradead.org>  
napisaÅ(a):

> On Wed, 2010-04-21 at 01:05 +0200, PaweÅ Sikora wrote:
> > hi,
> >
> > i'm trying to debug an ugly application with ElectricFence.
> > in fact, on x86-64 box with 8GB ram and 16GB swap i'm getting following  
> > error:
> >
> > "ElectricFence Exiting: mprotect() failed: Cannot allocate memory"
> >
> > the program has been compiled with gcc-4.5, glibc-2.11.1, kernel-2.6.32.
> > did you ever come across such (kernel/glibc) limitations?
> >
> > here's a simple testcase which triggs -ENOMEM in mprotect().
>
> You probably depleted the max map count, see:
>   /proc/sys/vm/max_map_count

yes, that is the clue :)

the limit in /proc/sys/vm/max_map_count was set to 65530.
with `echo 128000 > /proc/sys/vm/max_map_count` the testcase passes.

thanks for hint.