From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Thu, 8 Feb 2007 14:26:48 -0800 (PST)
From: Christoph Lameter <clameter@sgi.com>
Subject: Re: Drop PageReclaim()
In-Reply-To: <20070208142431.eb81ae70.akpm@linux-foundation.org>
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 <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:

> > We have a mechanism to trigger events based on the end of writeback 
> > (also triggered in end_page_writeback).
> 
> Not sure what you're referring to there.

      smp_mb__after_clear_bit();
      wake_up_page(page, PG_writeback);

> > But I guess we are not using it 
> > because we do not have a process context?
> 
> end_page_writeback() usually runs in hard IRQ context.

Those sleeping on the page must have their own process context
to do so.

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