From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.71) id 1dpWGP-0006ch-55 for mharc-qemu-trivial@gnu.org; Wed, 06 Sep 2017 05:04:49 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60121) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dpWGM-0006bL-PD for qemu-trivial@nongnu.org; Wed, 06 Sep 2017 05:04:47 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dpWGE-0003SP-Ud for qemu-trivial@nongnu.org; Wed, 06 Sep 2017 05:04:45 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39444) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dpWG5-0003PR-EH; Wed, 06 Sep 2017 05:04:29 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 62E1FC049D7F; Wed, 6 Sep 2017 09:04:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 62E1FC049D7F Authentication-Results: ext-mx07.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx07.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=rjones@redhat.com Received: from localhost (ovpn-117-64.ams2.redhat.com [10.36.117.64]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8E6F460BE8; Wed, 6 Sep 2017 09:04:25 +0000 (UTC) Date: Wed, 6 Sep 2017 10:04:24 +0100 From: "Richard W.M. Jones" To: "Daniel P. Berrange" Cc: kwolf@redhat.com, famz@redhat.com, qemu-trivial@nongnu.org, mjt@tls.msk.ru, qemu-devel@nongnu.org, armbru@redhat.com Message-ID: <20170906090424.GA18719@redhat.com> References: <20170906085006.26983-1-rjones@redhat.com> <20170906085902.GH15510@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170906085902.GH15510@redhat.com> User-Agent: Mutt/1.5.20 (2009-12-10) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Wed, 06 Sep 2017 09:04:28 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: Re: [Qemu-trivial] [Qemu-devel] [PATCH for-2.10] qemu-options: Document the -drive locking parameter. X-BeenThere: qemu-trivial@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 Sep 2017 09:04:48 -0000 On Wed, Sep 06, 2017 at 09:59:02AM +0100, Daniel P. Berrange wrote: > The 2.10 versio nis already released. Did you mean that you wanted > this in the stable branch ? If so, then CC qemu-stable@nongnu.org > > On Wed, Sep 06, 2017 at 09:50:06AM +0100, Richard W.M. Jones wrote: > > Commit 16b48d5d66d2 ("file-posix: Add 'locking' option") added this > > option, but as it was not documented in the -help output it was not > > easily possible to tell if a particular qemu binary supports it. > > NB, nothing should be parsing -help output to look for features > anymore. Is there really no other way to detect this feature ? It can be found from monitor output, but parsing -help output really is easier in some cases. In any case it's good to document it for end users. Rich. > > Signed-off-by: Richard W.M. Jones > > --- > > qemu-options.hx | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/qemu-options.hx b/qemu-options.hx > > index 9f6e2adfff..f8f95eb498 100644 > > --- a/qemu-options.hx > > +++ b/qemu-options.hx > > @@ -796,7 +796,7 @@ DEF("drive", HAS_ARG, QEMU_OPTION_drive, > > " [,cache=writethrough|writeback|none|directsync|unsafe][,format=f]\n" > > " [,serial=s][,addr=A][,rerror=ignore|stop|report]\n" > > " [,werror=ignore|stop|report|enospc][,id=name][,aio=threads|native]\n" > > - " [,readonly=on|off][,copy-on-read=on|off]\n" > > + " [,readonly=on|off][,copy-on-read=on|off][,locking=off|auto|on]\n" > > " [,discard=ignore|unmap][,detect-zeroes=on|off|unmap]\n" > > " [[,bps=b]|[[,bps_rd=r][,bps_wr=w]]]\n" > > " [[,iops=i]|[[,iops_rd=r][,iops_wr=w]]]\n" > > Reviewed-by: Daniel P. Berrange > > Regards, > Daniel > -- > |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| > |: https://libvirt.org -o- https://fstop138.berrange.com :| > |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :| -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into KVM guests. http://libguestfs.org/virt-v2v