[5.4][Xen] PV-on-HVM attach/detach is failed if you do more than 2048.

Solution Verified - Updated -

Issue

  • PV-on-HVM driver cannot attach/detach over 2048 and this problem comes from forgetting event channel(evtchn) release.
  • In detailed description, release hypercall is not executed.

Environment

  • Red Hat Enterprise Linux 5 Update 4
  • Architecture:x86

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