From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: device limit for kvm_io_bus Date: Wed, 31 Mar 2010 09:14:50 +0300 Message-ID: <4BB2E85A.7050202@redhat.com> References: <8286e4ee1003300856u77cbce04o77c9cebfc2fd2729@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: KVM General To: Cam Macdonell Return-path: Received: from mx1.redhat.com ([209.132.183.28]:1025 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752764Ab0CaGO5 (ORCPT ); Wed, 31 Mar 2010 02:14:57 -0400 In-Reply-To: <8286e4ee1003300856u77cbce04o77c9cebfc2fd2729@mail.gmail.com> Sender: kvm-owner@vger.kernel.org List-ID: On 03/30/2010 06:56 PM, Cam Macdonell wrote: > Hi, > > I'm trying to use ioeventfds for notification between guests. After > assigning a handful of ioeventfds I was getting a "no space left on > device error". The culprit seems to be that only 6 devices are > allowed for a guest on the kvm IO bus. The comment indicates a > somewhat low number was chosen. Can the limit be increased to > something on the order of the number of file descriptors a process > could have? > There's in fact a patch on the list to do just that, at least three people have been hitting it simultaneously. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic.