linux-kernel - Re: [PATCH 2/4] send callback when swap slot is freed

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Date:	Mon, 21 Sep 2009 14:12:30 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Hugh Dickins <hugh.dickins@...cali.co.uk>
Cc:	ngupta@...are.org, Greg KH <greg@...ah.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ed Tomlinson <edt@....ca>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	linux-mm-cc <linux-mm-cc@...top.org>,
	kamezawa.hiroyu@...fujitsu.com, nishimura@....nes.nec.co.jp
Subject: Re: [PATCH 2/4] send callback when swap slot is freed

Hi Hugh,

On Mon, 2009-09-21 at 12:07 +0100, Hugh Dickins wrote:
> Is the main basis for your disgust at the way that Nitin installs the
> callback, that loop down the swap_info_structs?  I should point out
> that it was I who imposed that on Nitin: before that he was passing a
> swap entry (or was it a swap type extracted from a swap entry?
> I forget), which was the sole reference to a swp_entry_t in his
> driver - I advised a bdev interface.

The callback setup from ->read() just looks gross. However, it's your
call Hugh so I'll just shut up now. ;-)

			Pekka

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