linux-kernel - Re: [PATCH 0/3] allow zram to use zbud as underlying allocator

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Message-ID: <55F6D356.5000106@suse.cz>
Date:	Mon, 14 Sep 2015 16:01:58 +0200
From:	Vlastimil Babka <vbabka@...e.cz>
To:	Vitaly Wool <vitalywool@...il.com>, minchan@...nel.org,
	sergey.senozhatsky@...il.com, ddstreet@...e.org
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 0/3] allow zram to use zbud as underlying allocator

On 09/14/2015 03:49 PM, Vitaly Wool wrote:
> While using ZRAM on a small RAM footprint devices, together with
> KSM,
> I ran into several occasions when moving pages from compressed swap back
> into the "normal" part of RAM caused significant latencies in system

I'm sure Minchan will want to hear the details of that :)

> operation. By using zbud I lose in compression ratio but gain in
> determinism, lower latencies and lower fragmentation, so in the coming

I doubt the "lower fragmentation" part given what I've read about the 
design of zbud and zsmalloc?

> patches I tried to generalize what I've done to enable zbud for zram so far.




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