Re: [Xen-devel] [PATCH 11/11] libxl, xl: add event_channels option to xl configuration file

[David Vrabel <dvrabel@xxxxxxxxxx>]

On 01/10/13 13:36, Ian Campbell wrote:
> On Fri, 2013-09-27 at 11:55 +0100, David Vrabel wrote:
> 
>> +value depends what the guest supports.  Guests supporting the
>> +FIFO-based event channel ABI support up to 131,071 event channels.
>> +Other guests are limited to 4095 (64-bit x86 and ARM) or 1023 (32-bit
>> +x86).
> 
> Does this setting really restrict the classical ABI to 127? TBH I'm fine
> if it does, just curious.

Yes, the limit applies regardless of the ABI that a guest uses.

With the 2-level ABI it doesn't save much Xen resources though (1 xen
heap page per 128 events).

David

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