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

KOSAKI Motohiro
2009-11-11T01:22:08Z

> 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@tiscali.co.uk>

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@jp.fujitsu.com>