[Bugs] [Bug 1418095] New: Portmap allocates way too much memory (256KB) on stack

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1418095

            Bug ID: 1418095
           Summary: Portmap allocates way too much memory (256KB) on stack
           Product: GlusterFS
           Version: mainline
         Component: glusterd
          Assignee: bugs at gluster.org
          Reporter: jdarcy at redhat.com
                CC: bugs at gluster.org



Some functions were allocating 64K booleans, which are (crazily) mapped to
4-byte ints, for a total of 256KB per call.  Besides being generally wasteful,
this means any code that creates worker threads - e.g. syncops, io-threads
translator - must allocate much bigger stacks for each thread *just in case* it
calls into portmap.  With multiplexing, this limits the number of threads we
can have, and therefore the number of bricks we can support in one process.

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