Re: [PATCH 3/6] mm: CONFIG_MMU for PG_mlocked

[KOSAKI Motohiro]

> Remove three degrees of obfuscation, left over from when we had
> CONFIG_UNEVICTABLE_LRU.  MLOCK_PAGES is CONFIG_HAVE_MLOCKED_PAGE_BIT
> is CONFIG_HAVE_MLOCK is CONFIG_MMU.  rmap.o (and memory-failure.o)
> are only built when CONFIG_MMU, so don't need such conditions at all.
> 
> Somehow, I feel no compulsion to remove the CONFIG_HAVE_MLOCK*
> lines from 169 defconfigs: leave those to evolve in due course.
> 
> Signed-off-by: Hugh Dickins <hugh.dickins@xxxxxxxxxxxxx>

I don't recall why Lee added this config option. but it seems very
reasonable and I storongly like it.

At least, vmscan folks never said "please try to disable CONFIG_MLOCK".
It mean this option didn't help our debug.

	Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>



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