From nobody Thu Sep 11 17:10:32 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0B411537F8 for ; Sun, 6 Apr 2025 16:55:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743958509; cv=none; b=lgoprYxkio/nFR4Bh6i9sTY8eLnMIfIrQSPXHLTy6AKNgwHcMyR0/qZE1st+oC6jJXMNLzxrOmQI+4Z91/ChvizisNOP8NvWpCzeqGfW5t3SkqgqeLhIv7rrsbpeNyVaXKIkWPKohX9kzjK/t4H6Tadz9fRrV+5eHsdUSvRCUwU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743958509; c=relaxed/simple; bh=w3ltC006kGJ6O8BCTCtrkRifQFArQpDm2qj0xHMN+9M=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=PcCCidGg32OXvBx+71EIw6ihvg+hGQy+OVtvAV9iSwhywXKjOwXgrW/a2Dck2Tad6FhsCb/A1MZijSVWUVEzcJdtEsRxM/opowpN1HjGYAPzdxv72POUrLXgqCpEAzISNbsJNdL41wXnxeJnHchCtsSpQp2Jg0qv0xLxVYL43o8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=m5rCLUkO; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="m5rCLUkO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7DE65C4CEE3; Sun, 6 Apr 2025 16:55:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1743958508; bh=w3ltC006kGJ6O8BCTCtrkRifQFArQpDm2qj0xHMN+9M=; h=Date:From:To:Cc:Subject:From; b=m5rCLUkO+2qH0Xc/BQU5fn2NN/T4AKYRKgB4sCOWZxlbGGdO7qQL1SD7yf/IDsFxa yoDRR+hPFJ+rJx85XX4Aaqegmw4IK/2m9AhkE09uUBD6rs01cT8wp6g75h92BjOUCw nZNFdDCnK3q2DMw2KwNILDf1IYlBBCDG7N3jQ37S1T40J5yrXKzYChI7JqTXPrLzw7 jn1CqWjKRs+sGI7HPxa6G3TK1D4NXkIwDf3uisd+CA4mkuPBbAiqS3fCocH1uQwopM +38/7VJYAmrdO22YnsPKD9b+lrlnA2vpbzGKoICRYKNgBNb+FgZ4vYtmhf5lEQ45eB GdMLatUcnXnNA== Date: Sun, 6 Apr 2025 18:55:02 +0200 From: Ingo Molnar To: Linus Torvalds Cc: linux-kernel@vger.kernel.org, Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Thomas Gleixner , Andrew Morton , Mathieu Desnoyers Subject: [GIT PULL] scheduler fixes Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Linus, Please pull the latest sched/urgent Git tree from: git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched-urgent-2= 025-04-06 # HEAD: 169eae7711ea4b745e2d33d53e7b88689b10e1a0 rseq: Eliminate useless= task_work on execve Miscellaneous scheduler fixes/updates: - Fix a nonsensical Kconfig combination - Remove an unnecessary rseq-notification Thanks, Ingo ------------------> Mathieu Desnoyers (1): rseq: Eliminate useless task_work on execve Oleg Nesterov (1): sched/isolation: Make CONFIG_CPU_ISOLATION depend on CONFIG_SMP fs/exec.c | 3 ++- init/Kconfig | 2 +- kernel/sched/core.c | 1 - 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/exec.c b/fs/exec.c index 5d1c0d2dc403..8e4ea5f1e64c 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1864,9 +1864,9 @@ static int bprm_execve(struct linux_binprm *bprm) goto out; =20 sched_mm_cid_after_execve(current); + rseq_execve(current); /* execve succeeded */ current->in_execve =3D 0; - rseq_execve(current); user_events_execve(current); acct_update_integrals(current); task_numa_free(current, false); @@ -1883,6 +1883,7 @@ static int bprm_execve(struct linux_binprm *bprm) force_fatal_sig(SIGSEGV); =20 sched_mm_cid_after_execve(current); + rseq_set_notify_resume(current); current->in_execve =3D 0; =20 return retval; diff --git a/init/Kconfig b/init/Kconfig index 681f38ee68db..ab9b0c2c3d52 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -709,7 +709,7 @@ endmenu # "CPU/Task time and stats accounting" =20 config CPU_ISOLATION bool "CPU isolation" - depends on SMP || COMPILE_TEST + depends on SMP default y help Make sure that CPUs running critical tasks are not disturbed by diff --git a/kernel/sched/core.c b/kernel/sched/core.c index cfaca3040b2f..c81cf642dba0 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -10703,7 +10703,6 @@ void sched_mm_cid_after_execve(struct task_struct *= t) smp_mb(); t->last_mm_cid =3D t->mm_cid =3D mm_cid_get(rq, t, mm); } - rseq_set_notify_resume(t); } =20 void sched_mm_cid_fork(struct task_struct *t)