From 662e8db5dd188ba0ca78b142716df904e254d157 Mon Sep 17 00:00:00 2001
From: Maruth Goyal <maruthgoyal@gmail.com>
Date: Wed, 9 Dec 2020 15:13:25 +0530
Subject: [PATCH] agent/sandbox:  Don't update cpuset when ncpus = 0

When receiving an OnlineCpuMemory RPC, if the number of CPUs to be
made available is 0, then updating the cpusets is a redundant operation.

Fixes: #1172

Signed-off-by: Maruth Goyal <maruthgoyal@gmail.com>
Signed-off-by: Peng Tao <bergwolf@hyper.sh>
---
 src/agent/src/sandbox.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/agent/src/sandbox.rs b/src/agent/src/sandbox.rs
index ee5ab08f98..b831119289 100644
--- a/src/agent/src/sandbox.rs
+++ b/src/agent/src/sandbox.rs
@@ -233,6 +233,10 @@ impl Sandbox {
             online_memory(&self.logger)?;
         }
 
+        if req.nb_cpus == 0 {
+            return Ok(());
+        }
+
         let cpuset = rustjail_cgroups::fs::get_guest_cpuset()?;
 
         for (_, ctr) in self.containers.iter() {