Messages in this thread | | | Date | Fri, 13 Sep 2013 21:18:03 +0100 | From | Al Viro <> | Subject | Re: linux-next: manual merge of the akpm tree with Linus' tree |
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On Fri, Sep 13, 2013 at 09:00:00PM +0100, Al Viro wrote: > > - d_lru_shrink_move: move from the "global" lru list to a private shrinker list > > - d_shrink_add/del: fairly obvious. > > > > And then "denty_lru_add/del" that actually take the current state into > > account and do the right thing. Those we had before, I'm just > > explaining the difference from the low-level operations that have > > fixed "from this state to that" semantics > > Looks sane; FWIW, the variant I'm playing with uses two independent > flags for "shrinker" and "per-sb", but AFAICS that doesn't yield better > code.
Actually, it does yield slightly better code... Look - if you take your patch and replace LRU_LIST | SHRINK_LIST combination with bare SHRINK_LIST (which can't occur right now). Then all transitions turn into flipping a single bit, check in dentry_lru_add() becomes if (!(flags & (SHRINK | LRU)) and dentry_lru_del() -- if (... & SHRINK) return ...; if (... & LRU) return ...
It can be done as a followup, anyway - better not mix that with fixes.
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