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LD.HUGETLBFS(1)						       LD.HUGETLBFS(1)

NAME
       ld.hugetlbfs - link a program for huge pages

SYNOPSIS
       ld.hugetlbfs [options]

DESCRIPTION
       ld.hugetlbfs replaces the normal ld command for linking programs to use
       hugepages.  Under gcc, you should use  the  option  -B  /usr/share/lib‐
       hugetlbfs  which	 tells	gcc to look in a non-standard location for the
       linker.	This could be set in the CFLAGS environment variable.

       -Wl,--hugetlbfs-align

	      This method of linking an application permits greater  flexibil‐
	      ity at runtime.  Using HUGETLB_ELFMAP, it is possible to control
	      which program segments are placed in hugepages.	The  following
	      four  settings will cause the indicated segments to be placed in
	      hugepages:

		      HUGETLB_ELFMAP=R	      Read-only segments (text)
		      HUGETLB_ELFMAP=W	      Writable segments (data/BSS)
		      HUGETLB_ELFMAP=RW	      All segments (text/data/BSS)
		      HUGETLB_ELFMAP=no	      No segments

	      It is possible to select specific huge page sizes for  read-only
	      and writable segments by using the following advanced syntax:

		      HUGETLB_ELFMAP=[R[=<pagesize>]:[W[=<pagesize>]]

	      -Wl,--hugetlbfs-link=B

	      Under binutils 2.16 or older, this option will link the applica‐
	      tion to store BSS data (only) into hugepages.

	      -Wl,--hugetlbfs-link=BDT

	      Under binutils 2.16 or older, this option will link the applica‐
	      tion   to	 store	text,  initialized  data  and  BSS  data  into
	      hugepages.

FILES
       [DESTDIR|/usr/share]/doc/libhugetlbfs/HOWTO

SEE ALSO
       libhugetlbfs(7), hugectl(8), hugeedit(8)

AUTHORS
       libhugetlbfs was written by various people  on  the  libhugetlbfs-devel
       mailing list.

				March 12, 2012		       LD.HUGETLBFS(1)

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