linux-kernel - [PATCH 3/3] documentation

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Message-Id: <1253595414-2855-4-git-send-email-ngupta@vflare.org>
Date:	Tue, 22 Sep 2009 10:26:54 +0530
From:	Nitin Gupta <ngupta@...are.org>
To:	Greg KH <greg@...ah.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Hugh Dickins <hugh.dickins@...cali.co.uk>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Marcin Slusarz <marcin.slusarz@...il.com>,
	Ed Tomlinson <edt@....ca>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	linux-mm-cc <linux-mm-cc@...top.org>
Subject: [PATCH 3/3] documentation

Short guide on how to setup and use ramzswap.

Signed-off-by: Nitin Gupta <ngupta@...are.org>

---
 drivers/staging/ramzswap/ramzswap.txt |   51 +++++++++++++++++++++++++++++++++
 1 files changed, 51 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/ramzswap/ramzswap.txt b/drivers/staging/ramzswap/ramzswap.txt
new file mode 100644
index 0000000..e9f1619
--- /dev/null
+++ b/drivers/staging/ramzswap/ramzswap.txt
@@ -0,0 +1,51 @@
+ramzswap: Compressed RAM based swap device
+-------------------------------------------
+
+Project home: http://compcache.googlecode.com/
+
+* Introduction
+
+It creates RAM based block devices which can be used (only) as swap disks.
+Pages swapped to these devices are compressed and stored in memory itself.
+See project home for use cases, performance numbers and a lot more.
+
+Individual ramzswap devices are configured and initialized using rzscontrol
+userspace utility as shown in examples below. See rzscontrol man page for more
+details.
+
+* Usage
+
+Following shows a typical sequence of steps for using ramzswap.
+
+1) Load Modules:
+	modprobe ramzswap num_devices=4
+	This creates 4 (uninitialized) devices: /dev/ramzswap{0,1,2,3}
+	(num_devices parameter is optional. Default: 1)
+
+2) Initialize:
+	Use rzscontrol utility to configure and initialize individual
+	ramzswap devices. Example:
+	rzscontrol /dev/ramzswap2 --init # uses default value of disksize_kb
+
+	*See rzscontrol man page for more details and examples*
+
+3) Activate:
+	swapon /dev/ramzswap2 # or any other initialized ramzswap device
+
+4) Stats:
+	rzscontrol /dev/ramzswap2 --stats
+
+5) Deactivate:
+	swapoff /dev/ramzswap2
+
+6) Reset:
+	rzscontrol /dev/ramzswap2 --reset
+	(This frees all the memory allocated for this device).
+
+
+Please report any problems at:
+ - Mailing list: linux-mm-cc at laptop dot org
+ - Issue tracker: http://code.google.com/p/compcache/issues/list
+
+Nitin Gupta
+ngupta@...are.org
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