linux-kernel - Re: [PATCH] zram: remove global tb

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Message-ID: <CAAmzW4Pn2VUEnQ8FyOaBffqfUiHt6ocLEEvyaJrSKmTjaNp_wQ@mail.gmail.com>
Date:	Wed, 7 May 2014 23:52:59 +0900
From:	Joonsoo Kim <js1304@...il.com>
To:	Weijie Yang <weijie.yang.kh@...il.com>
Cc:	Minchan Kim <minchan@...nel.org>,
	Weijie Yang <weijie.yang@...sung.com>,
	Davidlohr Bueso <davidlohr@...com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Seth Jennings <sjennings@...iantweb.net>,
	Nitin Gupta <ngupta@...are.org>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
	Bob Liu <bob.liu@...cle.com>,
	Dan Streetman <ddstreet@...e.org>,
	Heesub Shin <heesub.shin@...sung.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Linux-MM <linux-mm@...ck.org>
Subject: Re: [PATCH] zram: remove global tb_lock by using lock-free CAS

>> Most popular use of zram is the in-memory swap for small embedded system
>> so I don't want to increase memory footprint without good reason although
>> it makes synthetic benchmark. Alhought it's 1M for 1G, it isn't small if we
>> consider compression ratio and real free memory after boot

We can use bit spin lock and this would not increase memory footprint for 32 bit
platform.

Thanks.
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