From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Kiszka Subject: Re: [PATCH v2 RT 3.18] irq_work: Provide a soft-irq based queue Date: Fri, 15 May 2015 09:43:14 +0200 Message-ID: <5555A392.1050203@web.de> References: <5538A0DF.50401@siemens.com> <20150514195811.GJ13442@linutronix.de> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="WEmAAsRuFw28C1u4pdj95Lvhfva9hfWbE" Cc: RT , Linux Kernel Mailing List , Steven Rostedt , Mike Galbraith To: Sebastian Andrzej Siewior Return-path: In-Reply-To: <20150514195811.GJ13442@linutronix.de> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-rt-users.vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --WEmAAsRuFw28C1u4pdj95Lvhfva9hfWbE Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 2015-05-14 21:58, Sebastian Andrzej Siewior wrote: > * Jan Kiszka | 2015-04-23 09:35:59 [+0200]: >=20 >> Instead of turning all irq_work requests into lazy ones on -rt, just >> move their execution from hard into soft-irq context. >> >> This resolves deadlocks of ftrace which will queue work from arbitrary= >> contexts, including those that have locks held that are needed for >> raising a soft-irq. >> >> Signed-off-by: Jan Kiszka > Applied The thread went on, and Mike suggested an alternative implementation [1] that works fine and is even cleaner. Let's pick his. Jan [1] http://thread.gmane.org/gmane.linux.kernel/1937960 --WEmAAsRuFw28C1u4pdj95Lvhfva9hfWbE Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlVVo5IACgkQitSsb3rl5xT/FgCeIE05qXf3DpPNPCFuKIeDGB3n BI8AoJ06Aw3EnUu9ryI1lDXQGYU3TshL =dXrS -----END PGP SIGNATURE----- --WEmAAsRuFw28C1u4pdj95Lvhfva9hfWbE--