linux-kernel - Re: [RFC] on general object IDs again

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Message-ID: <20120111203423.GD28196@moon>
Date:	Thu, 12 Jan 2012 00:34:23 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Pavel Emelyanov <xemul@...allels.com>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kyle Moffett <kyle@...fetthome.net>, Tejun Heo <tj@...nel.org>,
	Glauber Costa <glommer@...allels.com>,
	Andi Kleen <andi@...stfloor.org>,
	Matt Helsley <matthltc@...ibm.com>,
	Pekka Enberg <penberg@...nel.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Vasiliy Kulikov <segoon@...nwall.com>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Herbert Xu <herbert@...dor.hengli.com.au>,
	"David S. Miller" <davem@...emloft.net>,
	Andrey Vagin <avagin@...nvz.org>
Subject: Re: [RFC] on general object IDs again

On Thu, Jan 12, 2012 at 12:24:33AM +0400, Pavel Emelyanov wrote:
> > In the second place the only reason why we would need O(N^2) complexity
> > instead of O(NlogN) is if the comparison system call only compares for
> > identity instead of returning a result that allows us to order the
> > objects we are worrying about.
> 
> Hm... I like this one. As I said we'd have to do the sorting anyway so
> having the less-equals-above comparator right in the kernel sounds OK.
> 

So it would look something like

	sys_cmp_kid(pid1, pid2, kid-type)

(where kid is kernel-id), right ? Or I miss something ?

	Cyrill
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