Re: [patch 08/11] mm: vmscan: convert global reclaim to per-memcgLRU lists

[KAMEZAWA Hiroyuki]

On Mon, 12 Sep 2011 12:57:25 +0200
Johannes Weiner <jweiner@xxxxxxxxxx> wrote:

> The global per-zone LRU lists are about to go away on memcg-enabled
> kernels, global reclaim must be able to find its pages on the
> per-memcg LRU lists.
> 
> Since the LRU pages of a zone are distributed over all existing memory
> cgroups, a scan target for a zone is complete when all memory cgroups
> are scanned for their proportional share of a zone's memory.
> 
> The forced scanning of small scan targets from kswapd is limited to
> zones marked unreclaimable, otherwise kswapd can quickly overreclaim
> by force-scanning the LRU lists of multiple memory cgroups.
> 
> Signed-off-by: Johannes Weiner <jweiner@xxxxxxxxxx>


Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>

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