linux-kernel - Re: [PATCH 2/2] zram/zcomp: do not zero out zcomp private pages

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Message-ID: <20151130071428.GC3262@bbox>
Date:	Mon, 30 Nov 2015 16:14:28 +0900
From:	Minchan Kim <minchan@...nel.org>
To:	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: Re: [PATCH 2/2] zram/zcomp: do not zero out zcomp private pages

On Fri, Nov 27, 2015 at 01:23:14PM +0900, Sergey Senozhatsky wrote:
> Do not __GFP_ZERO allocated zcomp ->private pages. We keep
> allocated streams around and use them for read/write requests,
> so we supply a zeroed out ->private to compression algorithm
> as a scratch buffer only once -- the first time we use that
> stream. For the rest of IO requests served by this stream
> ->private usually contains some temporarily data from the
> previous requests.
> 
> Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Acked-by: Minchan Kim <minchan@...nel.org>

Thanks.
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