> > I might buy that argument if we didn't also leave around _unreferenced_
> > inodes for minutes in the icache. And _that_ is much stronger source of
>
> I don't see it, at the last iput of an inode with i_nlink == 0 the inode
> is freed immediatly, not like the dcache that is left floating around as
> a negative one with no useful caching effects for most workloads.
Right. Now look at the inodes with i_nlink != 0. And realize that they'd
already gone through the aging in dcache - if they get to the point of
final iput(), they have no references remaining. And _after_ that they
happily stay in icache for minutes.
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