From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753475Ab0ISKvv (ORCPT ); Sun, 19 Sep 2010 06:51:51 -0400 Received: from mx1.redhat.com ([209.132.183.28]:19716 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752966Ab0ISKvt (ORCPT ); Sun, 19 Sep 2010 06:51:49 -0400 Date: Sun, 19 Sep 2010 12:45:50 +0200 From: "Michael S. Tsirkin" To: Gleb Natapov Cc: Avi Kivity , Marcelo Tosatti , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH RFC] kvm: enable irq injection from interrupt context Message-ID: <20100919104550.GA7350@redhat.com> References: <20100916125717.GA24284@redhat.com> <20100916131823.GH3008@redhat.com> <20100916135137.GB24850@redhat.com> <20100916140615.GJ3008@redhat.com> <20100916142335.GC24850@redhat.com> <20100916145117.GK3008@redhat.com> <20100916152411.GE24850@redhat.com> <20100916154326.GL3008@redhat.com> <20100916220715.GA30531@redhat.com> <20100917075929.GA11518@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100917075929.GA11518@redhat.com> User-Agent: Mutt/1.5.20 (2009-12-10) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Sep 17, 2010 at 09:59:29AM +0200, Gleb Natapov wrote: > > writing 0 to eventfd does nothing. The way to deassert irq > That is implementation detail of current irqfd. It was designed for MSI > not level triggered interrupts. Maybe we should add a check that gsi is mapped to MSI (or unmapped) then? Level which switches to 1 and back to 0 immediately will be racy anyway ... Avi? -- MST