[Bug 824] New: problems with memory allocation with -Xms option

[bugzilla-daemon at icedtea.classpath.org]

http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=824

             Bug #: 824
           Summary: problems with memory allocation with -Xms option
    Classification: Unclassified
           Product: IcedTea
           Version: unspecified
          Platform: x86_64
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: IcedTea7
        AssignedTo: ahughes at redhat.com
        ReportedBy: andrej.gelenberg at udo.edu
                CC: unassigned at icedtea.classpath.org


Created attachment 614
  --> http://icedtea.classpath.org/bugzilla/attachment.cgi?id=614
stracelog

$ java -Xms1024m 
Error occurred during initialization of VM
Could not reserve enough space for object heap

There 8 GB ram and about 10 GB swap, but it steel fail. Oracle JDK has the same
problem.

$ uname -a
Linux ls12nb2 3.1.4+ #43 SMP Tue Nov 29 11:33:43 CET 2011 x86_64 Intel(R)
Core(TM) i7 CPU M 620 @ 2.67GHz GenuineIntel GNU/Linux

System gentoo ~amd64

$ java -version
java version "1.7.0_147-icedtea"
OpenJDK Runtime Environment (IcedTea7 2.0) (Gentoo build
1.7.0_147-icedtea-b147)
OpenJDK 64-Bit Server VM (build 21.0-b17, mixed mode)

strace log show 2 overlapping mmap calls width MAP_FIXED flag:
...
[pid 29849] mmap(0x7d7200000, 358612992, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|0x40000, -1, 0) = 0x7d7200000
...
[pid 29849] mmap(0x785800000, 717225984, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|0x40000, -1, 0) = -1 ENOMEM (Cannot
allocate memory)
...

stracelog generated with:
$ strace -f java -Xms1024m  &>stracelog

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