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Message-Id: <1204643158.5338.5.camel@localhost>
Date: Tue, 04 Mar 2008 10:05:58 -0500
From: Lee Schermerhorn <Lee.Schermerhorn@...com>
To: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc: Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org,
linux-mm@...ck.org
Subject: Re: [patch 12/21] No Reclaim LRU Infrastructure
On Tue, 2008-03-04 at 19:46 +0900, KOSAKI Motohiro wrote:
> Hi
>
> sorry for late review.
>
> >
> > Index: linux-2.6.25-rc2-mm1/mm/Kconfig
> > ===================================================================
> > --- linux-2.6.25-rc2-mm1.orig/mm/Kconfig 2008-02-19 16:23:09.000000000 -0500
> > +++ linux-2.6.25-rc2-mm1/mm/Kconfig 2008-02-28 11:05:04.000000000 -0500
> > @@ -193,3 +193,13 @@ config NR_QUICK
> > config VIRT_TO_BUS
> > def_bool y
> > depends on !ARCH_NO_VIRT_TO_BUS
> > +
> > +config NORECLAIM
> > + bool "Track non-reclaimable pages (EXPERIMENTAL; 64BIT only)"
> > + depends on EXPERIMENTAL && 64BIT
>
> as far as I remembered, somebody said CONFIG_NORECLAIM is easy confusable.
> may be..
>
> IMHO insert "lru" word is better.
> example,
>
> config NORECLAIM_LRU
> bool "Zone LRU of track non-reclaimable pages (EXPERIMENTAL; 64BIT only)"
> depends on EXPERIMENTAL && 64BIT
OK. But, I'd suggest the 'bool' description be something like:
config NORECLAIM_LRU
bool "Add LRU list to track non-reclaimable pages (EXPERIMENTAL; 64BIT only)"
>
>
> > @@ -356,8 +380,10 @@ void release_pages(struct page **pages,
> > zone = pagezone;
> > spin_lock_irqsave(&zone->lru_lock, flags);
> > }
> > - VM_BUG_ON(!PageLRU(page));
> > - __ClearPageLRU(page);
> > + is_lru_page = PageLRU(page);
> > + VM_BUG_ON(!(is_lru_page));
> > + if (is_lru_page)
> > + __ClearPageLRU(page);
> > del_page_from_lru(zone, page);
> > }
>
> it seems unnecessary change??
Hmmm. Not sure what I was thinking here. Might be a relic of some
previous debug instrumentation. Guess I don't have any problem with
removing this change.
Lee
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