From patchwork Mon Feb 10 06:55:43 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kazuhiro Hayashi X-Patchwork-Id: 13967348 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 72B52C021A1 for ; Mon, 10 Feb 2025 06:56:45 +0000 (UTC) Received: from mo-csw.securemx.jp (mo-csw.securemx.jp [210.130.202.135]) by mx.groups.io with SMTP id smtpd.web10.45362.1739170602436669542 for ; Sun, 09 Feb 2025 22:56:42 -0800 Authentication-Results: mx.groups.io; dkim=pass header.i=kazuhiro3.hayashi@toshiba.co.jp header.s=key2.smx header.b=m1dhlpEF; spf=pass (domain: toshiba.co.jp, ip: 210.130.202.135, mailfrom: kazuhiro3.hayashi@toshiba.co.jp) DKIM-Signature: v=1;a=rsa-sha256;c=relaxed/simple;d=toshiba.co.jp;h=From:To:Cc :Subject:Date:Message-Id:In-Reply-To:References;i= kazuhiro3.hayashi@toshiba.co.jp;s=key2.smx;t=1739170574;x=1740380174;bh=+jRq6 pBjTZA/g6J9T9NYXpzObiQLHmv8zugfNAxez44=;b=m1dhlpEFy6B42fF2cCw+w2kcj//WKiD+mkj o4XPUh2xy1aaRa7QTO/nuGiCALvDUTtc2SpSRIvRVqMu9hvUiFetozN1w7rZbGymt0GoVdUfNLO0D MDbnYVm8nRodTAFJHI5WuyIJ8v2DHhTSX1eenFMXBJ+x0q1VNcbPFeltgBBb4ZwW/ZiOPGz+6EjRM NxtKohjzL7i/d7uP7vH3gzCa9Ohz8Mfdl3Bb6OgJw/2XjXY8a4RO/CNtSdveWH3JOw2lGbAZzcPCV 0YvPK3VKWU5GANAqVBIvpTEpsDc3pxzpKTREi7KEdDXNHBWWFRKX0fISga7iNbh9EnzorpehBZCQ= =; Received: by mo-csw.securemx.jp (mx-mo-csw1801) id 51A6uDur3258935; Mon, 10 Feb 2025 15:56:14 +0900 X-Iguazu-Qid: 2yAbAvUQLMDymhsI16 X-Iguazu-QSIG: v=2; s=0; t=1739170569; q=2yAbAvUQLMDymhsI16; m=a3H3MO9Uo5vvHAlyEcveR+c2PIVSA+TssczIWnNiNTI= Received: from imx2-a.toshiba.co.jp (imx2-a.toshiba.co.jp [106.186.93.35]) by relay.securemx.jp (mx-mr1801) id 51A6u8nV1015867 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Mon, 10 Feb 2025 15:56:08 +0900 From: Kazuhiro Hayashi To: linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev, cip-dev@lists.cip-project.org Cc: bigeasy@linutronix.de, tglx@linutronix.de, rostedt@goodmis.org, linux-rt-users@vger.kernel.org, pavel@denx.de Subject: [PATCH 4.4 v1 15/17] init: Introduce SYSTEM_SCHEDULING state Date: Mon, 10 Feb 2025 15:55:43 +0900 X-TSB-HOP2: ON Message-Id: <1739170545-25011-16-git-send-email-kazuhiro3.hayashi@toshiba.co.jp> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1739170545-25011-1-git-send-email-kazuhiro3.hayashi@toshiba.co.jp> References: <1739170545-25011-1-git-send-email-kazuhiro3.hayashi@toshiba.co.jp> List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Mon, 10 Feb 2025 06:56:45 -0000 X-Groupsio-URL: https://lists.cip-project.org/g/cip-dev/message/17792 From: Thomas Gleixner commit 69a78ff226fe0241ab6cb9dd961667be477e3cf7 upstream. might_sleep() debugging and smp_processor_id() debugging should be active right after the scheduler starts working. The init task can invoke smp_processor_id() from preemptible context as it is pinned on the boot cpu until sched_smp_init() removes the pinning and lets it schedule on all non isolated cpus. Add a new state which allows to enable those checks earlier and add it to the xen do_poweroff() function. No functional change. Tested-by: Mark Rutland Signed-off-by: Thomas Gleixner Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Boris Ostrovsky Acked-by: Mark Rutland Cc: Greg Kroah-Hartman Cc: Juergen Gross Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Steven Rostedt Link: http://lkml.kernel.org/r/20170516184736.196214622@linutronix.de Signed-off-by: Ingo Molnar Signed-off-by: Kazuhiro Hayashi --- drivers/xen/manage.c | 1 + include/linux/kernel.h | 6 +++++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c index f494126aaecd..4f907fbda6c0 100644 --- a/drivers/xen/manage.c +++ b/drivers/xen/manage.c @@ -188,6 +188,7 @@ static void do_poweroff(void) { switch (system_state) { case SYSTEM_BOOTING: + case SYSTEM_SCHEDULING: orderly_poweroff(true); break; case SYSTEM_RUNNING: diff --git a/include/linux/kernel.h b/include/linux/kernel.h index d68f639f7330..d472456c6fcc 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -481,9 +481,13 @@ extern int root_mountflags; extern bool early_boot_irqs_disabled; -/* Values used for system_state */ +/* + * Values used for system_state. Ordering of the states must not be changed + * as code checks for <, <=, >, >= STATE. + */ extern enum system_states { SYSTEM_BOOTING, + SYSTEM_SCHEDULING, SYSTEM_RUNNING, SYSTEM_HALT, SYSTEM_POWER_OFF,