From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jan Kiszka <jan.kiszka@siemens.com>
Subject: Re: [PATCH v3] KVM: Resize kvm_io_range array dynamically
Date: Wed, 29 Feb 2012 15:19:45 +0100
Message-ID: <4F4E3401.4010703@siemens.com>
References: <20120229052422.9775.34485.stgit@dhcp-8-167.nay.redhat.com> <20120229133034.13884.76262.stgit@dhcp-8-167.nay.redhat.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Cc: kvm@vger.kernel.org, jasowang@redhat.com, mtosatti@redhat.com,
	alex.williamson@redhat.com, avi@redhat.com, levinsasha928@gmail.com
To: Amos Kong <akong@redhat.com>
Return-path: <kvm-owner@vger.kernel.org>
Received: from david.siemens.de ([192.35.17.14]:19320 "EHLO david.siemens.de"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1030926Ab2B2OTw (ORCPT <rfc822;kvm@vger.kernel.org>);
	Wed, 29 Feb 2012 09:19:52 -0500
In-Reply-To: <20120229133034.13884.76262.stgit@dhcp-8-167.nay.redhat.com>
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

On 2012-02-29 14:30, Amos Kong wrote:
> kvm_io_bus devices are used for ioevent, pit, pic, ioapic,
> coalesced_mmio.
> 
> Currently Qemu only emulates one PCI bus, it contains 32 slots,
> one slot contains 8 functions, maximum of supported PCI devices:
>  1 * 32 * 8 = 256. The maximum of coalesced mmio zone is 100,
> each zone has an iobus devices. 300 io_bus devices is not enough.
> 
> This patch makes the kvm_io_range array can be resized dynamically.

Is there any limit, or can userspace allocate arbitrary amounts of
kernel memory this way?

Jan

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux