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

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  Re: [PATCH 0/2] Reinstate irq alloc/dealloc locking patch Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-04-22 16:40 +0200

#1385236 — Re: [PATCH 0/2] Reinstate irq alloc/dealloc locking patch

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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
> framework)
>
> 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
>      (again)
>
>   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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