linux-kernel - Re: [RFC][PATCH 07/10] zsmalloc: introduce auto-compact support

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Message-ID: <20150604144730.GA484@swordfish>
Date:	Thu, 4 Jun 2015 23:47:30 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:	Minchan Kim <minchan@...nel.org>
Cc:	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH 07/10] zsmalloc: introduce auto-compact support

On (06/04/15 16:04), Minchan Kim wrote:
[..]
> How about using slab shrinker?
> If there is memory pressure, it would be called by VM and we will
> try compaction without user's intervention and excessive object
> scanning should be avoid by your zs_can_compact.

hm, interesting.

ok, have a patch to trigger compaction from shrinker, but need to test
it more.

will send the updated patchset tomorrow, I think.

	-ss

> The concern I had about fragmentation spread out all over pageblock
> should be solved as another issue. I'm plaing to make zsmalloced
> page migratable. I hope we should work out it firstly to prevent
> system heavy memory fragmentation by automatic compaction.
> 
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