From: Kefu Chai <kchai@redhat.com>
Date: Tue, 27 Apr 2021 02:11:53 +0000 (+0800)
Subject: common/util: enable cgroup only on linux
X-Git-Tag: v17.1.0~2082^2~1
X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=7c0ed157d75df24994a2cad4f601a9e57daf7236;p=ceph.git

common/util: enable cgroup only on linux

cgroups, i.e. control groups, are a linux kernel feature. this is not
available on FreeBSD, Win32 or MacOS. furthermore, we are reading the
information of it by accessing files exposed using a tmpfs filesystem
mounted at /sys/fs/cgroup, which is not available on other systems.

in this change, instead of guarding it using `#ifndef _WIN32`, it is now
guraded using `defined(__linux__)`.

Signed-off-by: Kefu Chai <kchai@redhat.com>
---

diff --git a/src/common/util.cc b/src/common/util.cc
index 6cb1f02733cfc..dc676c2647e3f 100644
--- a/src/common/util.cc
+++ b/src/common/util.cc
@@ -167,7 +167,7 @@ static void distro_detect(map<string, string> *m, CephContext *cct)
 
 int get_cgroup_memory_limit(uint64_t *limit)
 {
-#ifndef _WIN32
+#if defined(__linux__)
   // /sys/fs/cgroup/memory/memory.limit_in_bytes
 
   // the magic value 9223372036854771712 or 0x7ffffffffffff000