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Avoid exception caused by cgroup writeback feature

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The cgroup writeback feature requires cooperation
between memcgs and blkcgs.
To avoid exceptions, we should add_task for blkcg before
memcg(push BlkIo before Mem).

For more Information:
https://www.alibabacloud.com/help/doc-detail/155509.ht

Signed-off-by: Tim Zhang <tim@hyper.sh>
This commit is contained in:
Tim Zhang
2020-11-05 19:05:14 +08:00
parent 10650e2b16
commit 0f76570677
1 changed files with 9 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
src/hierarchies.rs
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@@ -50,12 +50,19 @@ impl Hierarchy for V1 {
fn subsystems(&self) -> Vec<Subsystem> {
let mut subs = vec![];
if self.check_support(Controllers::Pids) {
subs.push(Subsystem::Pid(PidController::new(self.root(), false)));
// The cgroup writeback feature requires cooperation between memcgs and blkcgs
// To avoid exceptions, we should add_task for blkcg before memcg(push BlkIo before Mem)
// For more Information: https://www.alibabacloud.com/help/doc-detail/155509.htm
if self.check_support(Controllers::BlkIo) {
subs.push(Subsystem::BlkIo(BlkIoController::new(self.root(), false)));
}
if self.check_support(Controllers::Mem) {
subs.push(Subsystem::Mem(MemController::new(self.root(), false)));
}
if self.check_support(Controllers::Pids) {
subs.push(Subsystem::Pid(PidController::new(self.root(), false)));
}
if self.check_support(Controllers::CpuSet) {
subs.push(Subsystem::CpuSet(CpuSetController::new(self.root(), false)));
}
@@ -77,9 +84,6 @@ impl Hierarchy for V1 {
if self.check_support(Controllers::NetCls) {
subs.push(Subsystem::NetCls(NetClsController::new(self.root())));
}
if self.check_support(Controllers::BlkIo) {
subs.push(Subsystem::BlkIo(BlkIoController::new(self.root(), false)));
}
if self.check_support(Controllers::PerfEvent) {
subs.push(Subsystem::PerfEvent(PerfEventController::new(self.root())));
}