On Thu, 17 Jul 2014, Michal Hocko wrote:
> On Thu 17-07-14 09:26:04, Johannes Weiner wrote:
> > From bbe8c1645c77297a96ecd5d64d659ddcd6984d03 Mon Sep 17 00:00:00 2001
> > From: Johannes Weiner <[email protected]>
> > Date: Mon, 14 Jul 2014 08:51:54 -0400
> > Subject: [patch] mm: vmscan: clean up struct scan_control
> > 
> > Reorder the members by input and output, then turn the individual
> > integers for may_writepage, may_unmap, may_swap, compaction_ready,
> > hibernation_mode into bit fields to save stack space:
> > 
> > +72/-296 -224
> > kswapd                                       104     176     +72
> > try_to_free_pages                             80      56     -24
> > try_to_free_mem_cgroup_pages                  80      56     -24
> > shrink_all_memory                             88      64     -24
> > reclaim_clean_pages_from_list                168     144     -24
> > mem_cgroup_shrink_node_zone                  104      80     -24
> > __zone_reclaim                               176     152     -24
> > balance_pgdat                                152       -    -152
> > 
> > Suggested-by: Mel Gorman <[email protected]>
> > Signed-off-by: Johannes Weiner <[email protected]>
> 
> Looks nice to me.
> Acked-by: Michal Hocko <[email protected]>

Yes, looks nice to me too; and I agree that it was worthwhile to make
those initialization orders consistent, and drop the 0 initializations.

Acked-by: Hugh Dickins <[email protected]>
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