CentOS 7.0 - man page for ld.hugetlbfs (centos section 1)
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ld.hugetlbfs - link a program for huge pages
ld.hugetlbfs replaces the normal ld command for linking programs to use hugepages. Under
gcc, you should use the option -B /usr/share/libhugetlbfs which tells gcc to look in a
non-standard location for the linker. This could be set in the CFLAGS environment vari-
This method of linking an application permits greater flexibility 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 seg-
ments by using the following advanced syntax:
Under binutils 2.16 or older, this option will link the application to store BSS
data (only) into hugepages.
Under binutils 2.16 or older, this option will link the application to store text,
initialized data and BSS data into hugepages.
libhugetlbfs(7), hugectl(8), hugeedit(8)
libhugetlbfs was written by various people on the libhugetlbfs-devel mailing list.
March 12, 2012 LD.HUGETLBFS(1)
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