[root@dbser1 sysconfig]# grep Huge /proc/meminfo

HugePages_Total: 10250

HugePages_Free: 32

HugePages_Rsvd: 23

HugePages_Surp: 0

Hugepagesize: 2048 kB

The output of "cat /proc/meminfo" will include lines like:

.....
HugePages_Total: vvv
HugePages_Free:  www
HugePages_Rsvd:  xxx
HugePages_Surp:  yyy
Hugepagesize:    zzz kB

where:
HugePages_Total is the size of the pool of huge pages.
HugePages_Free  is the number of huge pages in the pool that are not yet
                allocated.
HugePages_Rsvd  is short for "reserved," and is the number of huge pages for
                which a commitment to allocate from the pool has been made,
                but no allocation has yet been made.  Reserved huge pages
                guarantee that an application will be able to allocate a
                huge page from the pool of huge pages at fault time.
HugePages_Surp  is short for "surplus," and is the number of huge pages in
                the pool above the value in /proc/sys/vm/nr_hugepages. The
                maximum number of surplus huge pages is controlled by
                /proc/sys/vm/nr_overcommit_hugepages.

更多详细信息请参考文档：http://www.kernel.org/doc/Documentation/vm/hugetlbpage.txt

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Linux HugePages /proc/meminfo输出行的含义

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