From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D7CDBC433E0 for ; Thu, 21 Jan 2021 21:40:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A3D9E23A56 for ; Thu, 21 Jan 2021 21:40:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727805AbhAUVkZ (ORCPT ); Thu, 21 Jan 2021 16:40:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59364 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727412AbhAUVdk (ORCPT ); Thu, 21 Jan 2021 16:33:40 -0500 Received: from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4E61EC06174A; Thu, 21 Jan 2021 13:32:55 -0800 (PST) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4DMFwy29jpz9rx8; Fri, 22 Jan 2021 08:32:50 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=canb.auug.org.au; s=201702; t=1611264771; bh=WqD6nMsWfm8wkWrN0VuKrvbVqutP657Jy9gvshg5kEM=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=qvc01sF+zowe5R5ce2pTR9hN4IWaUabGoFuaWi4QOVuo1c+AXSkE/rubP7VGYCdzd XcOKVMmQKt+lyyeBnJEN1dE6OGCBPwDv5pkz9/3hf3zW2zgSNAcvCF9d+gUIwoxugK PINlw+HWTvA0jVGA9091WwCYprg7v7+j+MCLlrG58rwgudxnctNrTlqTwcvrPa3kR2 klS/8015j15T++9d7VCToiwEl+2QxOybn7b96Mmu/qEwc6Fw+aLVVRgjamIURkTPed 3UJgckaWeicOKE7/BBojdUOUXwwnpv8E6FOwkN9lusgFTSW4KYyoGkkHhadQlu6z44 JSsx92tUdmDTQ== Date: Fri, 22 Jan 2021 08:32:49 +1100 From: Stephen Rothwell To: Sven Schnelle Cc: Linux Next Mailing List , Linux Kernel Mailing List , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Thomas Gleixner , Frederic Weisbecker , "Paul E. McKenney" Subject: Re: [PATCH] s390: allow reschedule on syscall restart Message-ID: <20210122083249.60d29c33@canb.auug.org.au> In-Reply-To: <20210121143926.21440-2-svens@linux.ibm.com> References: <20210121143926.21440-1-svens@linux.ibm.com> <20210121143926.21440-2-svens@linux.ibm.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/03Jr4fuQBFBteIb9I_.t_qw"; protocol="application/pgp-signature"; micalg=pgp-sha256 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Sig_/03Jr4fuQBFBteIb9I_.t_qw Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hi all, On Thu, 21 Jan 2021 15:39:26 +0100 Sven Schnelle wrot= e: > > Commit 845f44e8ef28 ("sched: Report local wake up on resched blind zone > within idle loop") from next-20210121 causes a warning because s390 > doesn't call sched_resched_local_allow() when restarting a syscall. >=20 > Signed-off-by: Sven Schnelle > --- > arch/s390/kernel/syscall.c | 1 + > 1 file changed, 1 insertion(+) >=20 > diff --git a/arch/s390/kernel/syscall.c b/arch/s390/kernel/syscall.c > index bc8e650e377d..2b39ac40f970 100644 > --- a/arch/s390/kernel/syscall.c > +++ b/arch/s390/kernel/syscall.c > @@ -162,6 +162,7 @@ void noinstr __do_syscall(struct pt_regs *regs, int p= er_trap) > do_syscall(regs); > if (!test_pt_regs_flag(regs, PIF_SYSCALL_RESTART)) > break; > + sched_resched_local_allow(); > local_irq_enable(); > } > exit_to_user_mode(); I add that today as a merge fixup patch to the merge of the rcu tree (which contains commit 845f44e8ef28 ("sched: Report local wake up on resched blind zone within idle loop") ). --=20 Cheers, Stephen Rothwell --Sig_/03Jr4fuQBFBteIb9I_.t_qw Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEENIC96giZ81tWdLgKAVBC80lX0GwFAmAJ8wEACgkQAVBC80lX 0GyRKwgApHeYDUXwAm0A6CmTZ8jd0sYi6V7cHZ1/MRl+HsHUYYRKL6JMe+a79DMp FDZpBDX2SkA85O/LUyHCACNQffK7gj7hMnuippWjygnS/FPeKtjLsv20+dmAkkWx Yb5zSo5eGrmyJebiXZZttcMjyXiYQWnlR1ylPT+TDUlWEXXGJNrcylqwiZzyuANU RVc02VRwuplx9eyVdGG4VWiKoQ5IWE23zxxq7x3BV9Q5LCVMwZ3H+1dY57lKFODg Pd/plnSLmHzX3UesHtA+tPCzj6J4mT7CaQeHU5pV//V0XDW95g8EQZiHpfCTK8OD tc47l8lFX4Q2oVcLm/yNna+UjOJBQQ== =+0ME -----END PGP SIGNATURE----- --Sig_/03Jr4fuQBFBteIb9I_.t_qw--