Re: RFC: Easy-Reclaimable LRU list

[Glauber Costa]

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.


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/