5.3-RC2: kqueue descriptor leak in resolver functions?

[Scott Long]

Dan Nelson wrote:
> In the last episode (Nov 02), Arjan de Vet said:
> 
>>I'm trying to track down a weird hang/panic in 5.3-RC* which seems to
>>happen after 1-1.5 days on my desktop machine. The one time I saw the
>>panic message it complained about kmem_map being full.
>>
>>This morning I noticed that the kernel memory used for kqueues was a
>>bit larger than expected so I started to monitor it more closely.
>>
>>I soon found out what seems to be the problem: mozilla keeps lots of
>>kqueue file descriptors open:
>>
>>    > lsof | fgrep mozilla | fgrep KQUEUE | wc -l
>>	1137
>>
>>This number grows over time (I have mozilla running permanently with
>>lots of tabs, most of which auto-refresh). Does anybody see something
>>similar with mozilla on 5.3-RC*?
> 
> 
> I see it often, but only with programs using libc_r.  I've seen up to
> 3000 kqueues in one process :)  I agree that the DNS lookup functions
> seem to be the problem.
>  

I've had mozilla run for 20 days straight on RELENG_5 (using KSE, btw).
At this point for 5.3 and given that this appears to be an isolated
problem, I'm going to defer it for now.

Scott