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crosvm: use vcpu cgorups for plugin

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BUG=b:228634930
TEST=presubmit --quick

Change-Id: I92f0a025280fca0cdfdf6b2420cbfd213ec0bc08
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3696460
Tested-by: kokoro <noreply+kokoro@google.com>
Auto-Submit: Anton Romanov <romanton@google.com>
Commit-Queue: Dmitry Torokhov <dtor@chromium.org>
Reviewed-by: Dmitry Torokhov <dtor@chromium.org>
This commit is contained in:
Anton Romanov 2022-06-08 17:53:30 +00:00 committed by Chromeos LUCI
parent 2ada57d26e
commit ded868a59f
1 changed files with 20 additions and 1 deletions
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21
src/crosvm/plugin/mod.rs
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@ -6,8 +6,8 @@ mod process;
mod vcpu;
use std::fs::File;
use std::io;
use std::io::Read;
use std::io::{self, Write};
use std::os::unix::net::UnixDatagram;
use std::path::Path;
use std::sync::atomic::{AtomicBool, Ordering};
@ -279,6 +279,7 @@ pub fn run_vcpus(
kill_signaled: &Arc<AtomicBool>,
exit_evt: &Event,
vcpu_handles: &mut Vec<thread::JoinHandle<()>>,
vcpu_cgroup_tasks_file: Option<File>,
) -> Result<()> {
let vcpu_thread_barrier = Arc::new(Barrier::new((vcpu_count) as usize));
let use_kvm_signals = !kvm.check_extension(Cap::ImmediateExit);
@ -325,6 +326,9 @@ pub fn run_vcpus(
let vcpu_exit_evt = exit_evt.try_clone().context("failed to clone event")?;
let vcpu_plugin = plugin.create_vcpu(cpu_id)?;
let vcpu = Vcpu::new(cpu_id as c_ulong, kvm, vm).context("error creating vcpu")?;
let vcpu_cgroup_tasks_file = vcpu_cgroup_tasks_file
.as_ref()
.map(|f| f.try_clone().unwrap());
vcpu_handles.push(
thread::Builder::new()
@ -336,6 +340,10 @@ pub fn run_vcpus(
vcpu.set_signal_mask(&[])
.expect("failed to set up KVM VCPU signal mask");
}
// Move vcpu thread to cgroup
if let Some(mut f) = vcpu_cgroup_tasks_file {
f.write_all(base::gettid().to_string().as_bytes()).unwrap();
}
if let Err(e) = enable_core_scheduling() {
error!("Failed to enable core scheduling: {}", e);
@ -808,6 +816,16 @@ pub fn run_config(cfg: Config) -> Result<()> {
}
if vcpu_handles.is_empty() && dying_instant.is_none() && plugin.is_started() {
let vcpu_cgroup_tasks_file = match &cfg.vcpu_cgroup_path {
None => None,
Some(cgroup_path) => {
// Move main process to cgroup_path
let mut f = File::create(&cgroup_path.join("tasks"))?;
f.write_all(std::process::id().to_string().as_bytes())?;
Some(f)
}
};
let res = run_vcpus(
&kvm,
&vm,
@ -816,6 +834,7 @@ pub fn run_config(cfg: Config) -> Result<()> {
&kill_signaled,
&exit_evt,
&mut vcpu_handles,
vcpu_cgroup_tasks_file,
);
if let Err(e) = res {
dying_instant.get_or_insert(Instant::now());