[Qemu-devel] [Bug 1441781] Re: qemuProcessSetEmulatorAffinity() not behaving as expected

[Chris Friesen]

** Summary changed:

- qemuProcessSetEmulatorAffinity() called before emulator process actually 
running
+ qemuProcessSetEmulatorAffinity() not behaving as expected

** Description changed:

  When running on a 24-CPU host and using vCPU and emulator pinning I've
  seen cases where the specified emulator pinning isn't applied as
  expected.
  
- It appears the bug was introduced by 411cea6 which moved both
+ It appears the bug was introduced/uncovered by 411cea6 which moved both
  qemuSetupCgroupForEmulator() and qemuProcessSetEmulatorAffinity() up
  before the call to qemuProcessWaitForMonitor().  Reverting this commit
  makes the problem go away.
+ 
+ It's not obvious why this makes a difference, since the pid had to have
+ been up and running already.

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https://bugs.launchpad.net/bugs/1441781

Title:
  qemuProcessSetEmulatorAffinity() not behaving as expected

Status in QEMU:
  New

Bug description:
  When running on a 24-CPU host and using vCPU and emulator pinning I've
  seen cases where the specified emulator pinning isn't applied as
  expected.

  It appears the bug was introduced/uncovered by 411cea6 which moved
  both qemuSetupCgroupForEmulator() and qemuProcessSetEmulatorAffinity()
  up before the call to qemuProcessWaitForMonitor().  Reverting this
  commit makes the problem go away.

  It's not obvious why this makes a difference, since the pid had to
  have been up and running already.

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