linux-kernel - [PATCH 0/2] cgroup map files: Add a key/value map file type to cgroups

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Message-Id: <20080221212854.408662000@menage.corp.google.com>
Date:	Thu, 21 Feb 2008 13:28:54 -0800
From:	menage@...gle.com
To:	kamezawa.hiroyu@...fujitsu.com, yamamoto@...inux.co.jp,
	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	balbir@...ibm.com, xemul@...nvz.org
Subject: [PATCH 0/2] cgroup map files: Add a key/value map file type to cgroups

[ Updated from the previous version to remove the colon from the map output ]

These patches add a new cgroup control file output type - a map from
strings to u64 values - and make use of it for the memory controller
"stat" file.

It is intended for use when the subsystem wants to return a collection
of values that are related in some way, for which a separate control
file for each value would make the reporting unwieldy.

The advantages of this are:

- more standardized output from control files that report
similarly-structured data that needs to be parsed programmatically

- less boilerplate required in cgroup subsystems

- simplifies transition to a future efficient cgroups binary API

Signed-off-by: Paul Menage <menage@...gle.com>


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