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Re: [Xen-devel] [PATCH 0/2] Reinstate irq alloc/dealloc locking patch


On 03/17/2016 09:33 AM, Boris Ostrovsky wrote:
Original version of that patch (commit a89941816726) had to be reverted
due to Xen allocating irqs in its cpu_up ops.

The first patch moves allocations into hotplug notifiers and the second
one restores the original patch (with minor adjustments to new hotplug

Boris Ostrovsky (2):
   xen/x86: Move irq allocation from Xen smp_op.cpu_up()
   hotplug: Prevent alloc/free of irq descriptors during cpu up/down

  arch/x86/kernel/smpboot.c |   11 ---------
  arch/x86/xen/enlighten.c  |   53 +++++++++++++++++++++++++++++++++++++-------
  arch/x86/xen/smp.c        |   45 +------------------------------------
  arch/x86/xen/smp.h        |    3 ++
  kernel/cpu.c              |    8 ++++++
  5 files changed, 57 insertions(+), 63 deletions(-)

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