From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir@xen.org>
Subject: Re: [PATCH RFC 0/8] Xen: FIFO-based event channel ABI
Date: Tue, 19 Mar 2013 21:15:57 +0000
Message-ID: <CD6E860D.5ED94%keir@xen.org>
References: <1363726818-25409-1-git-send-email-david.vrabel@citrix.com>
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To: David Vrabel <david.vrabel@citrix.com>, xen-devel@lists.xen.org
Cc: Wei Liu <wei.liu2@citrix.com>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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On 19/03/2013 21:00, "David Vrabel" <david.vrabel@citrix.com> wrote:

> This is an RFC of the FIFO-based event channel ABI described in this
> design document:
> 
> http://xenbits.xen.org/people/dvrabel/event-channels-C.pdf

Nice! :) It seems not massively more code than the 3-level implementation,
although granted it's not fully baked yet. But I like it.

 -- Keir

> Changes since draft B are:
> 
> - Queue tail is now private to Xen.
> 
> - Guest pages are specified by MFN in the hypercalls.
> 
> - Updated link/unlink algorithm to avoid races when adding an event to
>   a queue that is becoming empty.
> 
> Patch 1-5 do some preparatory work for supporting alternate ABIs.
> 
> Patch 6 is a hack to allow it to build.
> 
> Patch 7-8 add the ABI and the implementation.  Patch 8 list some of
> the known limitations with this RFC implementation.
> 
> David
>