为什么 CGroups 文件 memory.limit_in_bytes 使用 9223372036854771712 作为默认值?
Why CGroups file memory.limit_in_bytes use 9223372036854771712 as a default value?
Docker cgroup 文件 memory.limit_in_bytes 使用 9223372036854771712
而不是 uint64 max
作为默认值 ?
uint64 最大值 = 9223372036854775807
.
ahojliu@ubuntu:/sys/fs/cgroup/memory/docker/210401ffb15b18832b6a104d8aebac98cd29ff20fe0bc779f4ddfe04923faf46$ cat memory.limit_in_bytes
9223372036854771712
Ubuntu 20.04
Linux内核版本:
Linux version 5.11.0-41-generic (buildd@lgw01-amd64-005) (gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #45~20.04.1-Ubuntu SMP Wed Nov 10 10:20:10 UTC 2021
Docker版本:
Client: Docker Engine - Community
Version: 20.10.11
API version: 1.41
Go version: go1.16.9
Git commit: dea9396
Built: Thu Nov 18 00:37:06 2021
OS/Arch: linux/amd64
Context: default
Experimental: true
Server: Docker Engine - Community
Engine:
Version: 20.10.11
API version: 1.41 (minimum version 1.12)
Go version: go1.16.9
Git commit: 847da18
Built: Thu Nov 18 00:35:15 2021
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.4.12
GitCommit: 7b11cfaabd73bb80907dd23182b9347b4245eb5d
runc:
Version: 1.0.2
GitCommit: v1.0.2-0-g52b36a2
docker-init:
Version: 0.19.0
GitCommit: de40ad0
似乎 cgroup 内存的默认值设置为 PAGE_COUNTER_MAX,在 64 位上是 LONG_MAX/PAGE_SIZE platform.when paltform 的 PAGE_SIZE 是不同的, cgroup内存的默认值是不同的,比如4k和64k有不同的默认值:
0x7ffffffffffff000(页面大小=4k)
0x7fffffffffff0000(页面大小= 64k)
重新链接:
Docker cgroup 文件 memory.limit_in_bytes 使用 9223372036854771712
而不是 uint64 max
作为默认值 ?
uint64 最大值 = 9223372036854775807
.
ahojliu@ubuntu:/sys/fs/cgroup/memory/docker/210401ffb15b18832b6a104d8aebac98cd29ff20fe0bc779f4ddfe04923faf46$ cat memory.limit_in_bytes
9223372036854771712
Ubuntu 20.04
Linux内核版本:
Linux version 5.11.0-41-generic (buildd@lgw01-amd64-005) (gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #45~20.04.1-Ubuntu SMP Wed Nov 10 10:20:10 UTC 2021
Docker版本:
Client: Docker Engine - Community
Version: 20.10.11
API version: 1.41
Go version: go1.16.9
Git commit: dea9396
Built: Thu Nov 18 00:37:06 2021
OS/Arch: linux/amd64
Context: default
Experimental: true
Server: Docker Engine - Community
Engine:
Version: 20.10.11
API version: 1.41 (minimum version 1.12)
Go version: go1.16.9
Git commit: 847da18
Built: Thu Nov 18 00:35:15 2021
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.4.12
GitCommit: 7b11cfaabd73bb80907dd23182b9347b4245eb5d
runc:
Version: 1.0.2
GitCommit: v1.0.2-0-g52b36a2
docker-init:
Version: 0.19.0
GitCommit: de40ad0
似乎 cgroup 内存的默认值设置为 PAGE_COUNTER_MAX,在 64 位上是 LONG_MAX/PAGE_SIZE platform.when paltform 的 PAGE_SIZE 是不同的, cgroup内存的默认值是不同的,比如4k和64k有不同的默认值: 0x7ffffffffffff000(页面大小=4k) 0x7fffffffffff0000(页面大小= 64k) 重新链接: