[Qemu-devel] [Bug 1294227] Re: migration wrong handling of KVM_GET_DIRTY_LOG ioctl

[Christoffer Dall]

** Changed in: qemu
       Status: New => In Progress

** Changed in: qemu
     Assignee: (unassigned) => Christoffer Dall (cdall)

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https://bugs.launchpad.net/bugs/1294227

Title:
  migration wrong handling of KVM_GET_DIRTY_LOG ioctl

Status in QEMU:
  In Progress

Bug description:
  In the code below kvm_vm_ioctl(...) can return --errno != -1 from ioctl call, 
 but return only checks for -1. 
  Found during KVM-ARM migration which apperead to go through but was actually 
failing getting 
  memslot dirty bitmap.

  static int kvm_physical_sync_dirty_bitmap(....)
  {
   ....
   if(kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) {
     - err out
   }
   ... continue
  }

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