jasder
/
runc
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

libcontainer: intelrdt: Add more check if sub-features are enabled 

Double check if Intel RDT sub-features are available in "resource
control" filesystem. Intel RDT sub-features can be selectively disabled
or enabled by kernel command line (e.g., rdt=!l3cat,mba) in 4.14 and
newer kernel.

Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>
This commit is contained in:
Xiaochen Shen 2018-10-16 12:38:06 +08:00
parent f097339289
commit d59b17d6d5
1 changed files with 18 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
libcontainer/intelrdt/intelrdt.go
View File

@ -179,16 +179,29 @@ func init() {
// "cat_l3" flag for CAT and "mba" flag for MBA
isCatFlagSet, isMbaFlagSet, err := parseCpuInfoFile("/proc/cpuinfo")
if err != nil {
isCatEnabled = false
isMbaEnabled = false
return
}
// 2. Check if Intel RDT "resource control" filesystem is mounted
// The user guarantees to mount the filesystem
isFsMounted := isIntelRdtMounted()
isCatEnabled = isCatFlagSet && isFsMounted
isMbaEnabled = isMbaFlagSet && isFsMounted
if !isIntelRdtMounted() {
return
}
// 3. Double check if Intel RDT sub-features are available in
// "resource control" filesystem. Intel RDT sub-features can be
// selectively disabled or enabled by kernel command line
// (e.g., rdt=!l3cat,mba) in 4.14 and newer kernel
if isCatFlagSet {
if _, err := os.Stat(filepath.Join(intelRdtRoot, "info", "L3")); err == nil {
isCatEnabled = true
}
}
if isMbaFlagSet {
if _, err := os.Stat(filepath.Join(intelRdtRoot, "info", "MB")); err == nil {
isMbaEnabled = true
}
}
}
// Return the mount point path of Intel RDT "resource control" filesysem