linux-kernel - Re: [patch 14/21] scan noreclaim list for reclaimable pages

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Message-Id: <1204295934.5311.3.camel@localhost>
Date:	Fri, 29 Feb 2008 09:38:54 -0500
From:	Lee Schermerhorn <Lee.Schermerhorn@...com>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-mm@...ck.org
Subject: Re: [patch 14/21] scan noreclaim list for reclaimable pages

On Thu, 2008-02-28 at 15:41 -0800, Randy Dunlap wrote:
> On Thu, 28 Feb 2008 14:29:22 -0500 Rik van Riel wrote:
> 
> > V2 -> V3:
> > + rebase to 23-mm1 atop RvR's split LRU series
> > 
> > New in V2
> > 
> > This patch adds a function to scan individual or all zones' noreclaim
> > lists and move any pages that have become reclaimable onto the respective
> > zone's inactive list, where shrink_inactive_list() will deal with them.
> > 
> > This replaces the function to splice the entire noreclaim list onto the
> > active list for rescan by shrink_active_list().  That method had problems
> > with vmstat accounting and complicated '[__]isolate_lru_pages()'.  Now,
> > __isolate_lru_page() will never isolate a non-reclaimable page.  The
> > only time it should see one is when scanning nearby pages for lumpy
> > reclaim.
> > 
> >   TODO:  This approach may still need some refinement.
> >          E.g., put back to active list?
> > 
> > DEBUGGING ONLY: NOT FOR UPSTREAM MERGE
> > 
> > Signed-off-by:  Lee Schermerhorn <lee.schermerhorn@...com>
> > Signed-off-by:  Rik van Riel <riel@...hat.com>
> 
> 
> Hi,
> 
> I haven't looked at all 21 patches, but please use kernel-doc
> notation as it's defined.  See Documentation/kernel-doc-nano-HOWTO.txt
> for details, or ask.

Hi, Randy:

I'll make a pass thru the noreclaim patches and fix up the comment
blocks that are not quite kernel-doc.  I have to update some of the
patch descriptions as well, as some have become stale thanks to
additional work by Kosaki-san [e.g., the page vec cleanup].

I'll discuss with Rik, off-list, how to coordinate for the next
reposting.

Thanks,
Lee

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