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From: Paul Jackson <pj@sgi.com>
To: "Paul Menage" <menage@google.com>
Cc: lizf@cn.fujitsu.com, balbir@linux.vnet.ibm.com,
	balbir@in.ibm.com, xemul@openvz.org,
	kamezawa.hiroyu@jp.fujitsu.com, vatsa@linux.vnet.ibm.com,
	akpm@linux-foundation.org, containers@lists.linux-foundation.org,
	linux-kernel@vger.kernel.org
Subject: Re: [RFC][PATCH 1/7] CGroup API: Add cgroup.api control file
Date: Tue, 19 Feb 2008 23:17:26 -0600	[thread overview]
Message-ID: <20080219231726.4bd97520.pj@sgi.com> (raw)
In-Reply-To: <6599ad830802191851l66281e67rb49c766c2b1427c9@mail.gmail.com>

Paul M wrote:
> I guess it's not essential, I just figured that if we had that
> information, it made sense to make it available to userspace. I guess
> I'm happy with dropping the actual exposed cgroup.api file for now as
> long as we can work towards reducing the number of control files that
> just return strings, and make use of the structured output such as
> read_uint() miore.

I could certainly go along with that ... reducing the proportion of
control files returning untyped strings.

My sense of kernel-user API's is that usually the less said the better.
Identify the essential information that one side requires from the
other via a runtime API, and pass only that.  API's represent a
lifetime commitment, so the less promised the better.

Perhaps my primary concern with these *.api files was that I did not
understand who or what the critical use or user was; who found this
essential, not just nice to have.

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@sgi.com> 1.940.382.4214

  reply	other threads:[~2008-02-20  5:17 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-15 20:44 [RFC][PATCH 0/7] CGroup API: More structured API for CGroups control files Paul Menage
2008-02-15 20:44 ` [RFC][PATCH 1/7] CGroup API: Add cgroup.api control file Paul Menage
2008-02-16 10:07   ` Balbir Singh
2008-02-16 17:44     ` Paul Menage
2008-02-18  9:45       ` Li Zefan
2008-02-18 10:32         ` Balbir Singh
2008-02-19 21:57         ` Paul Jackson
2008-02-20  2:51           ` Paul Menage
2008-02-20  5:17             ` Paul Jackson [this message]
2008-02-20  5:23               ` Paul Menage
2008-02-20  2:51         ` Paul Menage
2008-02-15 20:44 ` [RFC][PATCH 2/7] CGroup API: Add cgroup map data type Paul Menage
2008-02-15 20:44 ` [RFC][PATCH 3/7] CGroup API: Use cgroup map for memcontrol stats file Paul Menage
2008-02-15 20:44 ` [RFC][PATCH 4/7] CGroup API: Add res_counter_read_uint() Paul Menage
2008-02-15 20:44 ` [RFC][PATCH 5/7] CGroup API: Use read_uint in memory controller Paul Menage
2008-02-15 20:44 ` [RFC][PATCH 6/7] CGroup API: Use descriptions for memory controller API files Paul Menage
2008-02-15 20:44 ` [RFC][PATCH 7/7] CGroup API: Update cpusets to use cgroup structured file API Paul Menage
2008-02-17  3:29   ` Paul Jackson
2008-02-17 17:18     ` Paul Menage
2008-02-17 17:28       ` Paul Jackson
2008-02-17 17:48         ` Paul Menage
2008-02-18  9:55     ` Li Zefan
     [not found]       ` <47B96805.7070002@linux.vnet.ibm.com>
2008-02-18 11:13         ` Balbir Singh
2008-02-18 11:52           ` Andreas Schwab
     [not found]             ` <47B971C6.4080807@linux.vnet.ibm.com>
2008-02-18 11:56               ` Balbir Singh
2008-02-16  4:21 ` [RFC][PATCH 0/7] CGroup API: More structured API for CGroups control files KAMEZAWA Hiroyuki
2008-02-16  9:31   ` Li Zefan
2008-02-16 17:40     ` Paul Menage

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