Re: mprotect() failed: Cannot allocate memory
From: PaweÅ Sikora
Date: Wed Apr 21 2010 - 06:42:48 EST
Dnia 21-04-2010 o 13:16:50 Peter Zijlstra <peterz@xxxxxxxxxxxxx>
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.
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