From: Keir Fraser <keir@xen.org>
To: Jan Beulich <JBeulich@novell.com>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: [PATCH 6/6] passthrough: use domain pirq as index of struct hvm_irq_dpci's hvm_timer array
Date: Tue, 05 Apr 2011 13:05:38 +0100 [thread overview]
Message-ID: <C9C0C422.2C504%keir@xen.org> (raw)
In-Reply-To: <4D9AEDDA0200007800039F5B@vpn.id2.novell.com>
On 05/04/2011 09:24, "Jan Beulich" <JBeulich@novell.com> wrote:
> Such space saving wouldn't, however, suffice to generally get the
> respective allocation sizes here to below PAGE_SIZE, not even when
> converting the array of structures into an array of pointers to
> structures. Whether a multi-level lookup mechanism would make sense here
> is questionable, as it can be expected that for other than Dom0 (which
> isn't hvm, and hence shouldn't use these data structures - see
> http://lists.xensource.com/archives/html/xen-devel/2011-03/msg02004.html)
> only very few entries would commonly be used here. An obvious alternative
> would be to use rb or radix trees (both currently only used in tmem).
Yes it would be preferable to be using radix trees much more widely.
-- Keir
prev parent reply other threads:[~2011-04-05 12:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-05 8:24 [PATCH 6/6] passthrough: use domain pirq as index of struct hvm_irq_dpci's hvm_timer array Jan Beulich
2011-04-05 12:05 ` Keir Fraser [this message]
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