Messages in this thread | | | Date | Tue, 26 Jun 2012 12:07:11 +0400 | From | Glauber Costa <> | Subject | Re: RFC: Easy-Reclaimable LRU list |
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On 06/26/2012 04:12 AM, Minchan Kim wrote: > On 06/25/2012 05:46 PM, Glauber Costa wrote: > >> On 06/19/2012 09:49 AM, Minchan Kim wrote: >>> Hi everybody! >>> >>> Recently, there are some efforts to handle system memory pressure. >>> >>> 1) low memory notification - [1] >>> 2) fallocate(VOLATILE) - [2] >>> 3) fadvise(NOREUSE) - [3] >>> >>> For them, I would like to add new LRU list, aka "Ereclaimable" which >>> is opposite of "unevictable". >>> Reclaimable LRU list includes_easy_ reclaimable pages. >>> For example, easy reclaimable pages are following as. >>> >>> 1. invalidated but remained LRU list. >>> 2. pageout pages for reclaim(PG_reclaim pages) >>> 3. fadvise(NOREUSE) >>> 4. fallocate(VOLATILE) >>> >>> Their pages shouldn't stir normal LRU list and compaction might not >>> migrate them, even. >> What about other things moving memory like CMA ? > > > Sorry for not being able to understand your point. > Can you elaborate a bit more? >
Well, maybe I didn't =) I was just wondering why exactly it is that troubles your scheme with compaction, and if such restriction would also apply to memory movement schemes like CMA.
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