linux-kernel - Re: [patch] mm: don't free swap slots on page deactivation

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Date:	Wed, 25 Feb 2009 16:31:26 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Johannes Weiner <hannes@...xchg.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch] mm: don't free swap slots on page deactivation

Johannes Weiner wrote:
> The pagevec_swap_free() at the end of shrink_active_list() was
> introduced in 68a22394 "vmscan: free swap space on swap-in/activation"
> when shrink_active_list() was still rotating referenced active pages.
> 
> In 7e9cd48 "vmscan: fix pagecache reclaim referenced bit check" this
> was changed, the rotating removed but the pagevec_swap_free() after
> the rotation loop was forgotten, applying now to the pagevec of the
> deactivation loop instead.
> 
> Now swap space is freed for deactivated pages.  And only for those
> that happen to be on the pagevec after the deactivation loop.
> 
> Complete 7e9cd48 and remove the rest of the swap freeing.
> 
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>
> Cc: Rik van Riel <riel@...hat.com>

Acked-by: Rik van Riel <riel@...hat.com>

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