linux-kernel - Re: [RFC][PATCH 2/7] RSS controller core

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Message-ID: <661de9470703120255k4c4c1d0fy97a2b7a033c7b5b1@mail.gmail.com>
Date:	Mon, 12 Mar 2007 15:25:07 +0530
From:	"Balbir Singh" <balbir@...ibm.com>
To:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Pavel Emelianov" <xemul@...ru>, Kirill@...p.osdl.org,
	Linux@...p.osdl.org, containers@...ts.osdl.org,
	"Paul Menage" <menage@...gle.com>,
	List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC][PATCH 2/7] RSS controller core

> doesn't look so good for me, mainly becaus of the
> additional per page data and per page processing
>
> on 4GB memory, with 100 guests, 50% shared for each
> guest, this basically means ~1mio pages, 500k shared
> and 1500k x sizeof(page_container) entries, which
> roughly boils down to ~25MB of wasted memory ...
>
> increase the amount of shared pages and it starts
> getting worse, but maybe I'm missing something here
>
> > We need to decide whether we want to do per-container memory
> > limitation via these data structures, or whether we do it via a
> > physical scan of some software zone, possibly based on Mel's patches.
>
> why not do simple page accounting (as done currently
> in Linux) and use that for the limits, without
> keeping the reference from container to page?
>
> best,
> Herbert
>

Herbert,

You lost me in the cc list and I almost missed this part of the
thread. Could you please not modify the "cc" list.

Thanks,
Balbir
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