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Re: [Xen-devel] [PATCH 07/12] xen/event: Add reference counting to event channels



On 12/14/2011 01:56 PM, Konrad Rzeszutek Wilk wrote:
> On Mon, Nov 28, 2011 at 11:49:06AM -0500, Daniel De Graaf wrote:
>> Event channels exposed to userspace by the evtchn module may be used by
>> other modules in an asynchronous manner, which requires that reference
>> counting be used to prevent the event channel from being closed before
>> the signals are delivered.
>>
>> The reference count on new event channels defaults to -1 which indicates
>> the event channel is not referenced outside the kernel; evtchn_get fails
>> if called on such an event channel. The event channels made visible to
>> userspace by evtchn have a normal reference count.
> 
> So I've 7 through 12 in my branch now. (7,8 and 9 are in the #linux-next
> and the 10-12 are in the #testing).
> 
> The other 1-6 you have might need to be parceled out (especially the netback
> one which usually goes through David Miller). Also I have to double-check -
> but did somebody review those 1-6 patches?
> 

The last review I've seen of these patches is this thread:

http://lists.xen.org/archives/html/xen-devel/2011-10/threads.html#01484

I'll post a v3 for those in a bit incorporating the comments in that
thread; the netback one was (unofficially?) acked by David Miller. I don't
see which of the other patches need to be parceled out as the files they
touch look like they are still being committed with only Xen developer
sign-offs.

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