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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E6F8EC433EF for ; Sat, 9 Oct 2021 10:08:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CEECC60EE3 for ; Sat, 9 Oct 2021 10:08:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244956AbhJIKKn (ORCPT ); Sat, 9 Oct 2021 06:10:43 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:49620 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244706AbhJIKJg (ORCPT ); Sat, 9 Oct 2021 06:09:36 -0400 Date: Sat, 09 Oct 2021 10:07:38 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1633774059; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=pU7OlDsRy/o682Zt01xRzlowEyfGs+MYw8QBWIkHcGE=; b=qNOa0CZpaalG85wn/zVu5/avQh3DDRRTW6FZvewMdMHFNYzVX2L2ZjSNAPhJ2wlWZ0wf5O 6TuVHgL6HFpDhrrncYNF9UOrQNQQq8syxQP75nkN4SkTX8IQKXfX04UzroRdIDjzNuSg1g kujKYwYoK65QlW6cHh4/Wz0HsvwLK9nv2Sm9b6QGoKff5FcR7dfFJQao+ZPR9ESxRbSfR3 1HvlFt/0xX0V9mJZXU+fpykYXk9MSVmnIqVKOLZ7rDuPVUzKX2ucTpgnUB2W7vmSTbexdM Av4PZ1nzocDacWo5EpBGddOTADa1bMwDeYKRTDmEdL2oGdbMEzXfIsDJWy8kmQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1633774059; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=pU7OlDsRy/o682Zt01xRzlowEyfGs+MYw8QBWIkHcGE=; b=UIe0VBNZG+C3J4BwwjHvFcg53/tNsUQOprce6B/KiAaZKDky+SW4D2ZnFVluM7nVcDOR6H oaMejXWhBqyldACQ== From: "tip-bot2 for Peter Zijlstra" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: sched/core] sched,livepatch: Use wake_up_if_idle() Cc: "Peter Zijlstra (Intel)" , Petr Mladek , Miroslav Benes , Vasily Gorbik , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20210929151723.162004989@infradead.org> References: <20210929151723.162004989@infradead.org> MIME-Version: 1.0 Message-ID: <163377405832.25758.6730763114934839783.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the sched/core branch of tip: Commit-ID: 2aa45be430a031c10d5f4a5bf3329ff8413a9187 Gitweb: https://git.kernel.org/tip/2aa45be430a031c10d5f4a5bf3329ff8413a9187 Author: Peter Zijlstra AuthorDate: Tue, 21 Sep 2021 22:16:02 +02:00 Committer: Peter Zijlstra CommitterDate: Thu, 07 Oct 2021 13:51:16 +02:00 sched,livepatch: Use wake_up_if_idle() Make sure to prod idle CPUs so they call klp_update_patch_state(). Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Petr Mladek Acked-by: Miroslav Benes Acked-by: Vasily Gorbik Tested-by: Petr Mladek Tested-by: Vasily Gorbik # on s390 Link: https://lkml.kernel.org/r/20210929151723.162004989@infradead.org --- kernel/livepatch/transition.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/kernel/livepatch/transition.c b/kernel/livepatch/transition.c index 75251e9..5683ac0 100644 --- a/kernel/livepatch/transition.c +++ b/kernel/livepatch/transition.c @@ -413,8 +413,11 @@ void klp_try_complete_transition(void) for_each_possible_cpu(cpu) { task = idle_task(cpu); if (cpu_online(cpu)) { - if (!klp_try_switch_task(task)) + if (!klp_try_switch_task(task)) { complete = false; + /* Make idle task go through the main loop. */ + wake_up_if_idle(cpu); + } } else if (task->patch_state != klp_target_state) { /* offline idle tasks can be switched immediately */ clear_tsk_thread_flag(task, TIF_PATCH_PENDING);