From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f197.google.com (mail-io0-f197.google.com [209.85.223.197]) by kanga.kvack.org (Postfix) with ESMTP id 32EFB6B0038 for ; Mon, 19 Sep 2016 22:46:20 -0400 (EDT) Received: by mail-io0-f197.google.com with SMTP id 92so20581552iom.2 for ; Mon, 19 Sep 2016 19:46:20 -0700 (PDT) Received: from szxga03-in.huawei.com (szxga03-in.huawei.com. [119.145.14.66]) by mx.google.com with ESMTPS id h58si22526992otd.125.2016.09.19.19.46.18 for (version=TLS1 cipher=AES128-SHA bits=128/128); Mon, 19 Sep 2016 19:46:19 -0700 (PDT) Message-ID: <57E0A2EC.7050809@huawei.com> Date: Tue, 20 Sep 2016 10:46:04 +0800 From: Xishi Qiu MIME-Version: 1.0 Subject: Re: [question] hugetlb: how to find who use hugetlb? References: <57DF4FEA.9080509@huawei.com> In-Reply-To: <57DF4FEA.9080509@huawei.com> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Linux MM , LKML 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@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org