linux-kernel - Re: [ckrm-tech] [RFC][PATCH 2/7] UBC: core (structures, API)

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Message-ID: <20060822122329.GA7125@in.ibm.com>
Date:	Tue, 22 Aug 2006 17:53:29 +0530
From:	Srivatsa Vaddagiri <vatsa@...ibm.com>
To:	Kirill Korotaev <dev@...ru>
Cc:	Matt Helsley <matthltc@...ibm.com>, Rik van Riel <riel@...hat.com>,
	"Chandra S. Seetharaman" <sekharan@...ibm.com>,
	CKRM-Tech <ckrm-tech@...ts.sourceforge.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andi Kleen <ak@...e.de>, Christoph Hellwig <hch@...radead.org>,
	Andrey Savochkin <saw@...ru>,
	Alan Cox <alan@...rguk.ukuu.org.uk>, hugh@...itas.com,
	Ingo Molnar <mingo@...e.hu>, devel@...nvz.org,
	Pavel Emelianov <xemul@...nvz.org>
Subject: Re: [ckrm-tech] [RFC][PATCH 2/7] UBC: core (structures, API)

On Mon, Aug 21, 2006 at 03:02:17PM +0400, Kirill Korotaev wrote:
> > Except that you eventually have to lock ub0. Seems that the cache line
> > for that spinlock could bounce quite a bit in such a hot path.
> do you mean by ub0 host system ub which we call ub0
> or you mean a top ub?

If this were used for pure resource management purpose (w/o containers)
then the top ub would be ub0 right? "How bad would the contention on the
ub0->lock be then" is I guess Matt's question.

-- 
Regards,
vatsa
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