linux-kernel - Re: [PATCH 05/10] Reduce per table entry overhead by 4 bytes

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Date:	Mon, 9 Aug 2010 21:59:30 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	Nitin Gupta <ngupta@...are.org>
Cc:	Pekka Enberg <penberg@...helsinki.fi>,
	Minchan Kim <minchan.kim@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg KH <greg@...ah.com>,
	Linux Driver Project <devel@...uxdriverproject.org>,
	linux-mm <linux-mm@...ck.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 05/10] Reduce per table entry overhead by 4 bytes

On Mon, Aug 9, 2010 at 8:26 PM, Nitin Gupta <ngupta@...are.org> wrote:
> Each zram device maintains an array (table) that maps
> index within the device to the location of corresponding
> compressed chunk. Currently we store 'struct page' pointer,
> offset with page and various flags separately which takes
> 12 bytes per table entry. Now all these are encoded in a
> single 'phys_add_t' value which results in savings of 4 bytes
> per entry (except on PAE systems).
>
> Unfortunately, cleanups related to some variable renames
> were mixed in this patch. So, please bear some additional
> noise.

The noise makes this patch pretty difficult to review properly. Care
to spilt the patch into two pieces?
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