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-HugeTLB Controller
--------------------
-
-The HugeTLB controller allows to limit the HugeTLB usage per control group and
-enforces the controller limit during page fault. Since HugeTLB doesn't
-support page reclaim, enforcing the limit at page fault time implies that,
-the application will get SIGBUS signal if it tries to access HugeTLB pages
-beyond its limit. This requires the application to know beforehand how much
-HugeTLB pages it would require for its use.
-
-HugeTLB controller can be created by first mounting the cgroup filesystem.
-
-# mount -t cgroup -o hugetlb none /sys/fs/cgroup
-
-With the above step, the initial or the parent HugeTLB group becomes
-visible at /sys/fs/cgroup. At bootup, this group includes all the tasks in
-the system. /sys/fs/cgroup/tasks lists the tasks in this cgroup.
-
-New groups can be created under the parent group /sys/fs/cgroup.
-
-# cd /sys/fs/cgroup
-# mkdir g1
-# echo $$ > g1/tasks
-
-The above steps create a new group g1 and move the current shell
-process (bash) into it.
-
-Brief summary of control files
-
- hugetlb.<hugepagesize>.limit_in_bytes     # set/show limit of "hugepagesize" hugetlb usage
- hugetlb.<hugepagesize>.max_usage_in_bytes # show max "hugepagesize" hugetlb  usage recorded
- hugetlb.<hugepagesize>.usage_in_bytes     # show current usage for "hugepagesize" hugetlb
- hugetlb.<hugepagesize>.failcnt		   # show the number of allocation failure due to HugeTLB limit
-
-For a system supporting two hugepage size (16M and 16G) the control
-files include:
-
-hugetlb.16GB.limit_in_bytes
-hugetlb.16GB.max_usage_in_bytes
-hugetlb.16GB.usage_in_bytes
-hugetlb.16GB.failcnt
-hugetlb.16MB.limit_in_bytes
-hugetlb.16MB.max_usage_in_bytes
-hugetlb.16MB.usage_in_bytes
-hugetlb.16MB.failcnt