From mboxrd@z Thu Jan  1 00:00:00 1970
From: Olaf Hering <olaf@aepfle.de>
Subject: Re: [PATCH 0 of 2] Mem event ring management overhaul
Date: Wed, 7 Dec 2011 14:17:53 +0100
Message-ID: <20111207131753.GA27309@aepfle.de>
References: <patchbomb.1323098647@xdev.gridcentric.ca>
	<20111206172605.GA18176@aepfle.de>
	<d33d99829ec12990334e271eeb36b06c.squirrel@webmail.lagarcavilla.org>
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To: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Cc: andres@gridcentric.ca, xen-devel@lists.xensource.com, tim@xen.org, keir.xen@gmail.com, adin@gridcentric.ca
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On Tue, Dec 06, Andres Lagar-Cavilla wrote:

> If the request comes from the guest itself, and it requires
> paging_populate (!= p2m_query), the event is guaranteed to be put in the
> ring, and then the vcpu goes to sleep.
> 
> Easy-peasy

If everything were so easy. ;-)

I will try to combine your patch with my paging waitqueue change.
Perhaps your change should disallow paging if max_cpus is larger than
RING_SIZE().


Olaf