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    SubjectRe: mprotect() failed: Cannot allocate memory
    Date
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    Dnia 21-04-2010 o 13:16:50 Peter Zijlstra <peterz@infradead.org>  
    napisał(a):

    > On Wed, 2010-04-21 at 01:05 +0200, Paweł 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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