[ewg] [RFC] libibverbs: ibv_fork_init() and libhugetlbfs

[Roland Dreier]

 >  * added get_huge_page_size() to read the huge page size from
 >    /proc/meminfo. This is done at ibv_fork_init() time.

That doesn't work on systems that have multiple huge page sizes (eg
powerpc).  You can compare the code to get the size in libhugetlbfs.

Also I think the munging through /proc/pid/maps doesn't really work.
First of all, essentially grepping for libhugetlbfs is not robust as I
mentioned -- this will break in the same way for apps using huge pages
directly.  And while it is nice to be able to tell if a range came from
libhugetlbfs, I think there may be some bad performance impact from
reading /proc/pid/maps line-by-line.  (And by the way, as a trivial
optimization, it would make sense to me to check the address of each map
before doing the strstr).

 - R.
-- 
Roland Dreier <rolandd at cisco.com> || For corporate legal information go to:
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