From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Thu, 8 Feb 2007 14:14:39 -0800 (PST)
From: Christoph Lameter <clameter@sgi.com>
Subject: Re: Drop PageReclaim()
In-Reply-To: <20070208140338.971b3f53.akpm@linux-foundation.org>
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To: Andrew Morton <akpm@linux-foundation.org>
Cc: Hugh Dickins <hugh@veritas.com>, linux-mm@kvack.org
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On Thu, 8 Feb 2007, Andrew Morton wrote:

> During the vmscan we encounter a page at the tail of the inactive list
> which we want to reclaim, but it's dirty.  So we start writeout and then
> move it to the head of the inactive list and keep scanning.
> 
> When writeback completes, we take a look at the page to see if it still
> seems to be reclaimable and if so, move it to the tail of the inactive list
> so that it will be reclaimed very soon.

Still reclaimable means on the LRU and not activated?
 
> PG_reclaim is used to indicate pages which need this treatment.

We have a mechanism to trigger events based on the end of writeback 
(also triggered in end_page_writeback). But I guess we are not using it 
because we do not have a process context?

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