From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49280) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gUmUh-00043m-3F for qemu-devel@nongnu.org; Thu, 06 Dec 2018 00:46:39 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gUmUa-0004g3-UB for qemu-devel@nongnu.org; Thu, 06 Dec 2018 00:46:37 -0500 Received: from mx1.redhat.com ([209.132.183.28]:37772) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gUmUa-0004dM-LJ for qemu-devel@nongnu.org; Thu, 06 Dec 2018 00:46:32 -0500 From: Markus Armbruster References: <20181205203737.9011-1-marcandre.lureau@redhat.com> <20181205203737.9011-5-marcandre.lureau@redhat.com> Date: Thu, 06 Dec 2018 06:46:13 +0100 In-Reply-To: <20181205203737.9011-5-marcandre.lureau@redhat.com> (=?utf-8?Q?=22Marc-Andr=C3=A9?= Lureau"'s message of "Thu, 6 Dec 2018 00:37:34 +0400") Message-ID: <87k1knky1m.fsf@dusky.pond.sub.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [Qemu-devel] [PATCH for-4.0 v4 4/7] monitor: check if chardev can switch gcontext for OOB List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: =?utf-8?Q?Marc-Andr=C3=A9?= Lureau Cc: qemu-devel@nongnu.org, Li Zhijian , Jason Wang , Zhang Chen , peterx@redhat.com, "Dr. David Alan Gilbert" , Paolo Bonzini Marc-Andr=C3=A9 Lureau writes: > Not all backends are able to switch gcontext. Those backends cannot > drive a OOB monitor (the monitor would then be blocking on main > thread). > > For example, ringbuf, spice, or more esoteric input chardevs like > braille or MUX. > > We currently forbid MUX because not all frontends are ready to run > outside main loop. Extend to add a context-switching feature check. > > Signed-off-by: Marc-Andr=C3=A9 Lureau Reviewed-by: Markus Armbruster