On 2016/9/19 10:39, Xishi Qiu wrote: > On my system, I set HugePages_Total to 2G(1024 x 2M), and I use 1G hugetlb, > but the HugePages_Free is not 1G(512 x 2M), it is 280(280 x 2M) left, > HugePages_Rsvd is 0, it seems someone use 232(232 x 2M) hugetlb additionally. > > So how to find who use the additional hugetlb? > > I search every process and find the total hugetlb size is only 1G, > cat /proc/xx/smaps | grep KernelPageSize, then account the vma size > which KernelPageSize is 2048 kB. > > Thanks, > Xishi Qiu > I kill the processes which use hugetlb, and set 0 to nr_hugepages. My kernel version is v3.10 meminfo: HugePages_Total: 232 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 232 Hugepagesize: 2048 kB "cat /proc/*/smaps | grep KernelPageSize| grep 2048" shows nothing. linux-ZSfbIr:/home # mount | grep hugetlb cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb) hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime) nodev on /dev/hugepages type hugetlbfs (rw,relatime) linux-ZSfbIr:/home # ll /dev/hugepages/ total 0 linux-ZSfbIr:/home # ll /sys/fs/cgroup/hugetlb/ total 0 -rw-r--r-- 1 root root 0 Sep 13 08:10 cgroup.clone_children --w--w--w- 1 root root 0 Sep 13 08:10 cgroup.event_control -rw-r--r-- 1 root root 0 Sep 13 08:10 cgroup.procs -r--r--r-- 1 root root 0 Sep 13 08:10 cgroup.sane_behavior -rw-r--r-- 1 root root 0 Sep 13 08:10 hugetlb.1GB.failcnt -rw-r--r-- 1 root root 0 Sep 13 08:10 hugetlb.1GB.limit_in_bytes -rw-r--r-- 1 root root 0 Sep 13 08:10 hugetlb.1GB.max_usage_in_bytes -r--r--r-- 1 root root 0 Sep 13 08:10 hugetlb.1GB.usage_in_bytes -rw-r--r-- 1 root root 0 Sep 13 08:10 hugetlb.2MB.failcnt -rw-r--r-- 1 root root 0 Sep 13 08:10 hugetlb.2MB.limit_in_bytes -rw-r--r-- 1 root root 0 Sep 13 08:10 hugetlb.2MB.max_usage_in_bytes -r--r--r-- 1 root root 0 Sep 13 08:10 hugetlb.2MB.usage_in_bytes -rw-r--r-- 1 root root 0 Sep 13 08:10 notify_on_release -rw-r--r-- 1 root root 0 Sep 13 08:10 release_agent -rw-r--r-- 1 root root 0 Sep 13 08:10 tasks linux-ZSfbIr:/home # > > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>