From: Keir Fraser <keir.xen@gmail.com>
To: Dan Magenheimer <dan.magenheimer@oracle.com>,
Jan Beulich <JBeulich@suse.com>, TimDeegan <tim@xen.org>
Cc: Zhigang Wang <zhigang.x.wang@oracle.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
xen-devel@lists.xen.org
Subject: Re: [RFC/PATCH] XENMEM_claim_pages (subop of an existing) hypercall
Date: Wed, 14 Nov 2012 07:23:56 +0000 [thread overview]
Message-ID: <CCC8F78C.44A23%keir.xen@gmail.com> (raw)
In-Reply-To: <4a60001b-b323-4d62-8e7a-456b0f5e553a@default>
On 13/11/2012 22:23, "Dan Magenheimer" <dan.magenheimer@oracle.com> wrote:
> The key variables (d->unclaimed_pages and total_unclaimed_pages)
> start at zero if no claim has yet been staked for any domain.
> (Perhaps a better name is "claimed_but_not_yet_possessed" but that's
> a bit unwieldy.) If no claim hypercalls are executed, there
> should be no impact on existing usage.
It would be nice if d->tot_pages adjustments didn't take the global
heap_lock in this case. There's probably some way to bail out of those new
update functions before doing the locked work, in that case.
-- Keir
next prev parent reply other threads:[~2012-11-14 7:23 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-13 22:23 [RFC/PATCH] XENMEM_claim_pages (subop of an existing) hypercall Dan Magenheimer
2012-11-14 7:23 ` Keir Fraser [this message]
2012-11-14 17:42 ` Dan Magenheimer
2012-11-14 18:58 ` Keir Fraser
2012-11-14 19:32 ` Dan Magenheimer
2012-11-14 10:33 ` Jan Beulich
2012-11-14 18:33 ` Dan Magenheimer
2012-11-15 10:47 ` Ian Campbell
2012-11-15 11:23 ` Jan Beulich
2012-11-15 12:12 ` Keir Fraser
2012-11-15 12:17 ` Ian Campbell
2012-11-15 19:02 ` Dan Magenheimer
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