Ceph » CephFS

Here's one: https://github.com/ceph/ceph/pull/3598

This is a global string constant, which valgrind apparently doesn't understand:

    <frame>
      <ip>0x5EAEEF7</ip>
      <obj>/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19</obj>  
      <fn>std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;::basic_string(char const*, std::allocator&lt;char&gt; const&amp;)</fn>
    </frame>
    <frame>
      <ip>0x594F55</ip>
      <obj>/usr/bin/ceph-mds</obj>
      <fn>_GLOBAL__sub_I_MDSAuthCaps.cc</fn>
      <dir>/srv/autobuild-ceph/gitbuilder.git/build/out~/ceph-0.91-1066-gcab246d/src/mds</dir>
      <file>MDSAuthCaps.cc</file>
      <line>30</line>
    </frame>

This one is weird, I wonder if the compiler is optmising and leaving the constant function-scoped FeatureSet instances in get_mdsmap_compat_set_default allocated between functions? that's not a very credible suggestion but it's all I've got...

    <frame>
      <ip>0x5EAEEF7</ip>
      <obj>/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19</obj>  
      <fn>std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;::basic_string(char const*, std::allocator&lt;char&gt; const&amp;)</fn>
    </frame>
    <frame>
      <ip>0x89A9F8</ip>
      <obj>/usr/bin/ceph-mds</obj>
      <fn>get_mdsmap_compat_set_default()</fn>
      <dir>/srv/autobuild-ceph/gitbuilder.git/build/out~/ceph-0.91-1066-gcab246d/src/./include</dir>
      <file>CompatSet.h</file>
      <line>28</line>
    </frame>
    <frame>
      <ip>0x5CB936</ip>
      <obj>/usr/bin/ceph-mds</obj>
      <fn>Beacon::_notify_mdsmap(MDSMap const*)</fn>
      <dir>/srv/autobuild-ceph/gitbuilder.git/build/out~/ceph-0.91-1066-gcab246d/src/mds</dir>
      <file>Beacon.cc</file>
      <line>198</line>