> I have been mulling over this issue for some time. My current thinking
> is that pending some more well thought out mechanism, the right thing
> to do here is to detect the DOS and react to that, not to handicap
> the caching in general.
>
> The easiest way to detect this DOS is probably to keep track of the
>
> namecache entries
> -----------------
> live vnodes
>
> ratio, and enforce an upper limit on it.
That seems like a reasonable approach.
If you want to include the other attack I mentioned (I just tried it,
got up to > 160000 vnodes), then you have to exclude vnodes that are
only live because of v_cache_src entries from the count.
BTW: You still haven't committed the v_id patch I sent you in May. Is
there any specific reason for this?
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