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Message-ID: <20080703091637.5fcb0308@bree.surriel.com> Date: Thu, 3 Jul 2008 09:16:37 -0400 From: Rik van Riel <riel@...hat.com> To: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> Cc: Andrew Morton <akpm@...ux-foundation.org>, kosaki.motohiro@...fujitsu.com, LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>, Lee Schermerhorn <Lee.Schermerhorn@...com>, Benjamin Kidwell <benjkidwell@...oo.com> Subject: Re: [-mm][PATCH 1/10] fix UNEVICTABLE_LRU and !PROC_PAGE_MONITOR build On Thu, 03 Jul 2008 15:02:23 +0900 KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> wrote: > > > config UNEVICTABLE_LRU > > > bool "Add LRU list to track non-evictable pages" > > > default y > > > + select PAGE_WALKER > > > > So what do we do? Make UNEVICTABLE_LRU depend on CONFIG_MMU? That > > would be even worse than what we have now. > > I'm not sure about what do we do. but I'd prefer "depends on MMU". > because current munlock implementation need pagewalker. > So, munlock rewriting have high risk rather than change depend on. > > Rik, What do you think? I suspect that systems without an MMU will not run into page replacement scalability issues, so making the UNEVICTABLE_LRU config option depend on MMU should be ok. -- All rights reversed. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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