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From: Cyrill Gorcunov <gorcunov@openvz.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Michal Marek <mmarek@suse.cz>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, ebiederm@xmission.com,
	xemul@parallels.com, Andrey Vagin <avagin@openvz.org>,
	KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
	Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
	Glauber Costa <glommer@parallels.com>,
	Andi Kleen <andi@firstfloor.org>, Tejun Heo <tj@kernel.org>,
	Matt Helsley <matthltc@us.ibm.com>,
	Pekka Enberg <penberg@kernel.org>,
	Eric Dumazet <eric.dumazet@gmail.com>,
	Vasiliy Kulikov <segoon@openwall.com>,
	Alexey Dobriyan <adobriyan@gmail.com>,
	Frederic Weisbecker <fweisbec@gmail.com>
Subject: Re: [patch 1/2] kcmp: Make it to depend on CONFIG_KCMP
Date: Wed, 20 Feb 2013 02:02:44 +0400	[thread overview]
Message-ID: <20130219220244.GQ20312@moon> (raw)
In-Reply-To: <5123F32B.3000401@zytor.com>

On Tue, Feb 19, 2013 at 01:48:27PM -0800, H. Peter Anvin wrote:
> >
> >This permits people to select kcmp with CONFIG_CHECKPOINT_RESTORE=n.
> >Is there any point in doing that?
> >
> >What would be wrong with just doing
> >
> >	obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o
> >
> 
> The real question is if there are any potential use cases of kcmp()
> outside checkpoint/restore.  It is actually a very general facility.

As far as I remember Eric was pointing to such potential use at early
time when kcmp being only started developing (I'm trying to find this
email in archive, if only my memory doesn't betray me and it was about
something else ;) Nevertheless, one may write utility to output
statistics on shared "resource" used by a task (don't know if it's
that useful since we use kcmp for c/r sake, but still).

  reply	other threads:[~2013-02-19 22:02 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-19  6:48 [patch 0/2] make kcmp own config entry Cyrill Gorcunov
2013-02-19  6:48 ` [patch 1/2] kcmp: Make it to depend on CONFIG_KCMP Cyrill Gorcunov
2013-02-19  8:47   ` KOSAKI Motohiro
2013-02-19  9:22   ` Michal Marek
2013-02-19  9:31     ` Cyrill Gorcunov
2013-02-19 17:53       ` H. Peter Anvin
2013-02-19 18:28         ` Cyrill Gorcunov
2013-02-19 21:42           ` Andrew Morton
2013-02-19 21:48             ` H. Peter Anvin
2013-02-19 22:02               ` Cyrill Gorcunov [this message]
2013-02-19 21:54             ` Cyrill Gorcunov
2013-02-19 22:00               ` Andrew Morton
2013-02-19 22:11                 ` Cyrill Gorcunov
2013-02-19 22:15                   ` Cyrill Gorcunov
2013-02-19 22:32                     ` Cyrill Gorcunov
2013-02-19 23:41                   ` H. Peter Anvin
2013-02-19  6:48 ` [patch 2/2] arm: Wire up kcmp syscall Cyrill Gorcunov
2013-02-19  7:07   ` Cyrill Gorcunov
2013-02-20 23:17     ` Andrew Morton
2013-02-21  5:43       ` Cyrill Gorcunov
2013-02-23 22:31     ` Arnd Bergmann

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