From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jamie Lokier <jamie@shareable.org>
Subject: Re: [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver
Date: Sun, 28 Mar 2010 14:28:40 +0100
Message-ID: <20100328132840.GC3417@shareable.org>
References: <8286e4ee1003250924q7cca5e71u8b8b7c6d8b785eb8@mail.gmail.com> <4BAB90BB.5030401@redhat.com> <8286e4ee1003260914u5e6ceee2pf0c00590de182fb6@mail.gmail.com> <4BAE44F2.20801@redhat.com> <20100328074754.GA21749@redhat.com> <4BAF0D03.7060300@redhat.com> <20100328094006.GB21749@redhat.com> <4BAF251E.50609@redhat.com> <20100328103123.GC21749@redhat.com> <4BAF39B7.1010508@redhat.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
	Cam Macdonell <cam@cs.ualberta.ca>, qemu-devel@nongnu.org,
	kvm@vger.kernel.org
To: Avi Kivity <avi@redhat.com>
Return-path: <kvm-owner@vger.kernel.org>
Received: from mail2.shareable.org ([80.68.89.115]:55784 "EHLO
	mail2.shareable.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1754450Ab0C1N24 (ORCPT <rfc822;kvm@vger.kernel.org>);
	Sun, 28 Mar 2010 09:28:56 -0400
Content-Disposition: inline
In-Reply-To: <4BAF39B7.1010508@redhat.com>
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

Avi Kivity wrote:
> ioctls encode the buffer size into the ioctl number, so in theory strace 
> doesn't need to be taught about an ioctl to show its buffer.

Unfortunately ioctl numbers don't always follow that rule :-(
But maybe that's just awful proprietary drivers that I've seen.

Anyway, strace should be taught how to read kernel headers to get
ioctl types ;-)

-- Jamie