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Re: [PATCH] PCI MSI: allow alignment restrictions on vector allocation

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On Mon, 2 Oct 2017, Thomas Gleixner wrote:
> On Mon, 2 Oct 2017, Daniel Drake wrote:
>   2) The affinity setting of straight MSI interrupts (w/o remapping) on x86
>      requires to make the affinity change from the interrupt context of the
>      current active vector in order not to lose interrupts or worst case
>      getting into a stale state.
> 
>      That works for single vectors, but trying to move all vectors in one
>      go is more or less impossible, as there is no reliable way to
>      determine that none of the other vectors is on flight.
> 
>      There might be some 'workarounds' for that, but I rather avoid that
>      unless we get an official documented one from Intel/AMD.

Thinking more about it. That might be actually a non issue for MSI, but we
have that modus operandi in the current code and we need to address that
first before even thinking about multi MSI support.

Thanks,

	tglx

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Re: [PATCH] PCI MSI: allow alignment restrictions on vector  allocation Thomas Gleixner <tglx@linutronix.de> - 2017-09-27 17:30 +0200
  Re: [PATCH] PCI MSI: allow alignment restrictions on vector allocation Daniel Drake <drake@endlessm.com> - 2017-10-02 11:00 +0200
    Re: [PATCH] PCI MSI: allow alignment restrictions on vector  allocation Thomas Gleixner <tglx@linutronix.de> - 2017-10-02 22:50 +0200

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