Re: kdbus: add documentation

[Florian Weimer]

* David Herrmann:

> On Sun, Nov 30, 2014 at 10:02 AM, Florian Weimer <fw@xxxxxxxxxxxxx> wrote:
>> * Greg Kroah-Hartman:
>>
>>> +7.4 Receiving messages

>> What happens if this is not possible because the file descriptor limit
>> of the processes would be exceeded?  EMFILE, and the message will not
>> be received?
>
> The message is returned without installing the FDs. This is signaled
> by EMFILE, but a valid pool offset.

Oh.  This is really surprising, so it needs documentation.  But it's
probably better than the alternative (return EMFILE and leave the
message stuck, so that you receive it immediately againâthis behavior
makes non-blocking accept rather difficult to use correctly).
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