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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 39F7ECCF9E9 for ; Wed, 29 Oct 2025 12:13:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: Message-ID:Date:References:In-Reply-To:Subject:Cc:To:From:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=esT651bRTLMfYO64YXGQAJOBt0V7qx7+gpXmLKe21Vg=; b=Le3YBPxBYWDhXYd9SML0TErgwF NG1mHZaz1uayXQ10ZDI8LEPz91NXVTHIARCTGjTYL3A0piQtgyO3WkfFYYMFgshChhlq3408+xpMO QtBbh8H1dpPrdi7ddBNjJag7kjQ/8ueJpUSI5Dge+GvvGdvU+uuXr6WbKLtVzYn7HSMKPSp68YzYP pu/T2PBeN8bR5HrBHeSmsCfsIir/T4gSYOa/7W8S2p4EhuOI24O+xAX5sHGf6J1f/HdliQfqOFWpp ppO0bOYsVN0TMNGryxngslX8cifesafm8hqzpYxlZCli/VS5aIrD1cL/5bT+X9FbO0yW9iy7NGJEd VWWS8nRA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vE53o-000000017Hw-3quz; Wed, 29 Oct 2025 12:13:52 +0000 Received: from galois.linutronix.de ([2a0a:51c0:0:12e:550::1]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vE53n-000000017H4-0Aia for kexec@lists.infradead.org; Wed, 29 Oct 2025 12:13:52 +0000 From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1761740027; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=esT651bRTLMfYO64YXGQAJOBt0V7qx7+gpXmLKe21Vg=; b=FNjg/KK3z43CBxdoBj4DiMOs6lEpaVT2c19t+sCcU5AnFVO//ILQqObKmdgVNHei83gaxh z9RxPcTXVixWGXfKVv6CO/prEPtQ38fEiG2sZEiHcpNexDuMUHydc8WO/9cVpIn9BMTUOL E1PFsRI3MNyAs2jMaXjU5fK1c0LW82/lHXZn3RtxqyT0cxzWpvgypVIYup8sRwglobt4ge xe33rDmF8gDrlitIgs7AFwCzwBXaZteHgvLktvsEUkToWNiEx15RjVwQyYIttgB+2sCLP4 nyV92pk6a+XfkG621JknI8y5xftNJVuiQ+QLKqyqDBbqxWDrP3kqu2ECjGrwxA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1761740027; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=esT651bRTLMfYO64YXGQAJOBt0V7qx7+gpXmLKe21Vg=; b=GHI1xpu7ATaNuoTDBNyIGte1DBj98hRzidFOeQS/Z6SjdbJBBv14xsj9/Duna/GlphZwf2 KelyW71TWP5MkEBw== To: Pingfan Liu Cc: kexec@lists.infradead.org, linux-kernel@vger.kernel.org, Waiman Long , Peter Zijlstra , Juri Lelli , Pierre Gondois , Andrew Morton , Baoquan He , Ingo Molnar , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Valentin Schneider , "Rafael J. Wysocki" , Joel Granados Subject: Re: [RFC 2/3] kernel/cpu: Mark nonboot cpus as inactive when shutting down nonboot cpus In-Reply-To: References: <20251022121345.23496-1-piliu@redhat.com> <20251022121345.23496-3-piliu@redhat.com> <877bwgw9yf.ffs@tglx> <87qzunuqqo.ffs@tglx> Date: Wed, 29 Oct 2025 13:13:46 +0100 Message-ID: <874irhvrb9.ffs@tglx> MIME-Version: 1.0 Content-Type: text/plain X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251029_051351_243012_CE3F328C X-CRM114-Status: UNSURE ( 9.99 ) X-CRM114-Notice: Please train this message. X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org On Wed, Oct 29 2025 at 19:36, Pingfan Liu wrote: > On Tue, Oct 28, 2025 at 01:59:11PM +0100, Thomas Gleixner wrote: >> If you freeze stuff there is nothing to do. Hibernation works exactly >> that way without any magic hacks in a particular scheduling class, no? >> > > There is a nuance: DL bandwidth represents a commitment, not necessarily > the actual payload. Even a blocked DL task still occupies DL bandwidth. > The system's DL bandwidth remains unchanged as long as the CPUs stay > online, which is the case in hibernation. No. Hibernation brings the non-boot CPUs down in order to create the disk image. Thanks, tglx