Issues

• GKE Autopilot 1.37.1 (COS 6.18.48, containerd 2.4.1): node freezes after the efficiency-daemon widens the kubepods cpuset under a busy systrap sandbox

  type: bug
  google/gvisor#16475 · Filter by author ReadAccessBot opened on Oct 27, 2026

• procfs: /proc/sys/fs/aio-max-nr and aio-nr are missing; Redpanda/Seastar aborts at startup

  google/gvisor#16443 · Filter by author bpross opened on Oct 26, 2026

• netstack: close() and shutdown(SHUT_WR) wait out the 200ms TCP_CORK timer instead of flushing

  google/gvisor#16437 · Filter by author graysonguarino opened on Oct 26, 2026

• netlink: NLMSG_DONE payload is 8 bytes (int64) instead of 4 bytes (int) as on Linux

  type: bug
  google/gvisor#16426 · Filter by author ngm0 opened on Oct 26, 2026

• Very slow Reno recovery after packet loss without TCP timestamps

  type: bug
  google/gvisor#16393 · Filter by author mapelkon opened on Oct 25, 2026
  5

• Rootless directfs: mmap returns ENODEV and utimensat returns EACCES for read-only files

  google/gvisor#16342 · Filter by author olesho opened on Oct 24, 2026

• Optimization: Make pkg/state cheap and fast

  area: performance
  google/gvisor#16216 · Filter by author EtiennePerot opened on Oct 22, 2026 · Lightspeed
  3

  

• Optimization: Read local state files through the async read-ahead reader during restore

  area: performance
  google/gvisor#16209 · Filter by author milantracy opened on Oct 22, 2026 · Lightspeed
  

• Optimization: Don't decommit zero pages during a checkpoint that does not resume

  area: performance
  google/gvisor#16207 · Filter by author milantracy opened on Oct 22, 2026 · Lightspeed
  1

• Optimization: Derive gofer inode numbers from host keys instead of the ever-growing inoByKey map

  area: performance
  google/gvisor#16197 · Filter by author EtiennePerot opened on Oct 22, 2026 · Lightspeed
  10

  

• signalfd read: short buffers consume the signal, records are 130 bytes, and only one signal is returned per read

  google/gvisor#16192 · Filter by author sotomayorlucas opened on Oct 22, 2026

• FUTEX_LOCK_PI blocks forever when the futex owner does not exist or exits (Linux returns ESRCH or hands off the lock)

  google/gvisor#16184 · Filter by author sotomayorlucas opened on Oct 22, 2026

• Optimization: Detect bfq idling on the disks a sandbox uses, and turn it off in --host-settings=adjust

  area: performance
  google/gvisor#16176 · Filter by author EtiennePerot opened on Oct 22, 2026 · Lightspeed

• Optimization: Take KVM vCPU pool creation and the membarrier registration off the sandbox startup path

  area: performance
  google/gvisor#16173 · Filter by author EtiennePerot opened on Oct 22, 2026 · Lightspeed
  

• Optimization: Start fdbased recvmmsg with one receive slot and grow it on backlog

  area: performance
  google/gvisor#16172 · Filter by author EtiennePerot opened on Oct 22, 2026 · Lightspeed
  1

• Optimization: Copy only committed pages when breaking copy-on-write

  area: performance
  google/gvisor#16171 · Filter by author EtiennePerot opened on Oct 22, 2026 · Lightspeed

• Optimization: Keep unused /proc and /sys trees out of checkpoints

  area: performance
  google/gvisor#16170 · Filter by author EtiennePerot opened on Oct 22, 2026 · Lightspeed
  

• systrap kills healthy sandboxes that the host stalled for more than 30 seconds

  area: platformtype: bug
  google/gvisor#16160 · Filter by author EtiennePerot opened on Oct 21, 2026 · Lightspeed
  

• Optimization: Trim three avoidable allocations from the Sentry's boot heap

  area: performance
  google/gvisor#16159 · Filter by author EtiennePerot opened on Oct 21, 2026 · Lightspeed
  

• Optimization: Return the Sentry's startup heap to the host shortly after start and restore

  area: performance
  google/gvisor#16158 · Filter by author EtiennePerot opened on Oct 21, 2026 · Lightspeed
  

• Optimization: Run the systrap fast-path state machine inline instead of on a 400 µs timer

  area: performance
  google/gvisor#16155 · Filter by author EtiennePerot opened on Oct 21, 2026 · Lightspeed
  

• Optimization: Let gofers exit once their container no longer needs them

  area: performance
  google/gvisor#16154 · Filter by author EtiennePerot opened on Oct 21, 2026 · Lightspeed

• Optimization: Start the gofer with a GOMAXPROCS bounded by its cgroup and capped at 8

  area: performance
  google/gvisor#16153 · Filter by author EtiennePerot opened on Oct 21, 2026 · Lightspeed

• Optimization: Suspend the Sentry's Go GC while saving a checkpoint

  area: performance
  google/gvisor#16152 · Filter by author EtiennePerot opened on Oct 21, 2026 · Lightspeed
  

• Optimization: Cancel pending async page loads of decommitted pages instead of waiting for them

  area: performance
  google/gvisor#16151 · Filter by author EtiennePerot opened on Oct 21, 2026 · Lightspeed