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feature(krata): first pass on cpu hotplug support

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This commit is contained in:
Alex Zenla
2024-08-15 00:58:44 -07:00
parent 4d183f02ca
commit 133ecc7d2b
10 changed files with 122 additions and 22 deletions
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6
crates/runtime/src/launch.rs
View File

@ -30,7 +30,8 @@ pub struct ZoneLaunchRequest {
pub initrd: Vec<u8>,
pub uuid: Option<Uuid>,
pub name: Option<String>,
pub cpus: u32,
pub target_cpus: u32,
pub max_cpus: u32,
pub target_memory: u64,
pub max_memory: u64,
pub env: HashMap<String, String>,
@ -195,7 +196,8 @@ impl ZoneLauncher {
let config = DomainConfig {
base: BaseDomainConfig {
max_vcpus: request.cpus,
max_vcpus: request.max_cpus,
target_vcpus: request.target_cpus,
max_mem_mb: request.max_memory,
target_mem_mb: request.target_memory,
kernel: request.kernel,

31
crates/runtime/src/lib.rs
View File

@ -1,7 +1,6 @@
use std::{fs, path::PathBuf, str::FromStr, sync::Arc};
use anyhow::{anyhow, Result};
use krataloopdev::LoopControl;
use std::{fs, path::PathBuf, str::FromStr, sync::Arc};
use tokio::sync::Semaphore;
use uuid::Uuid;
@ -258,6 +257,34 @@ impl Runtime {
Ok(())
}
pub async fn set_cpu_resources(&self, domid: u32, target_cpus: u32) -> Result<()> {
let domain_path = self.context.xen.store.get_domain_path(domid).await?;
let cpus = self
.context
.xen
.store
.list(&format!("{}/cpu", domain_path))
.await?;
let tx = self.context.xen.store.transaction().await?;
for cpu in cpus {
let Some(id) = cpu.parse::<u32>().ok() else {
continue;
};
let available = if id >= target_cpus {
"offline"
} else {
"online"
};
tx.write_string(
format!("{}/cpu/{}/availability", domain_path, id),
available,
)
.await?;
}
tx.commit().await?;
Ok(())
}
pub async fn list(&self) -> Result<Vec<ZoneInfo>> {
self.context.list().await
}