From: Keir Fraser <keir.fraser@eu.citrix.com>
To: Mukesh Rathor <mukesh.rathor@oracle.com>,
"Xen-devel@lists.xensource.com" <Xen-devel@lists.xensource.com>
Subject: Re: increase evtchn limits
Date: Fri, 21 May 2010 08:01:38 +0100 [thread overview]
Message-ID: <C81BEE62.14B81%keir.fraser@eu.citrix.com> (raw)
In-Reply-To: <20100520204110.2d421bfe@mantra.us.oracle.com>
On 21/05/2010 04:41, "Mukesh Rathor" <mukesh.rathor@oracle.com> wrote:
>
> I'm trying to boot up with lot more than 32 vcpus on this very large box.
> I overcame vcpu_info[MAX_VIRT_CPUS] by doing vcpu placement hypercall
> in guest, but now running into evt channel limit (lots of devices):
>
> unsigned long evtchn_pending[sizeof(unsigned long) * 8];
>
> which limits to 512 max for my 64bit dom0.
How many CPUs do you have to bring up? How many event channels are we
squandering per CPU in PV Linux right now (can you enumerate them)?
-- Keir
next prev parent reply other threads:[~2010-05-21 7:01 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-21 3:41 increase evtchn limits Mukesh Rathor
2010-05-21 5:07 ` Zhigang Wang
2010-05-21 7:12 ` Keir Fraser
2010-05-21 18:52 ` Mukesh Rathor
2010-05-21 20:15 ` Keir Fraser
2010-05-21 7:01 ` Keir Fraser [this message]
-- strict thread matches above, loose matches on Subject: below --
2010-05-21 8:14 Jan Beulich
2010-05-21 9:25 ` Keir Fraser
2010-05-21 9:29 ` Keir Fraser
2010-05-21 11:09 ` Jan Beulich
2010-05-21 10:52 ` Jan Beulich
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