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 92565C5479D for ; Tue, 10 Jan 2023 02:25:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=3vWqhYBhqJNC92QXFgyVDM8H4VC0p8XwKUarbh42+H4=; b=RWDYf07qkdRD4V XRsYrTsdbOGVN8IQHe1cKRzVkXNOFcxi6kt+ciE1AJXi+m12+hog43AWWZ/Bid5va8rIdbr/0Pdoo Gdmf5OPYHrmFcqV79J12INRucUV33Jg8voEOuYuXyz3YcFPAp8NB/93uiUucivJLJDK7itmh+0CVK 9f90EmexYhw64PRqoM9D9lx+768n+CfT7V/iOP4M4zgfpe5q8ZsrmHcEtX1x/eI8i8PenJPTPQvyY eyecgwk1MI60GW+Gf1ZYJ34g5q0ffH5w30EiVQf+rblrZ3a8+FoZLFzHA0LAU/S4jrJHDXDSC6ANW A2HEa+R/3uVQMqw4133A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pF4Jr-004yRt-Pd; Tue, 10 Jan 2023 02:24:55 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pF4Jo-004yQY-FD for kexec@lists.infradead.org; Tue, 10 Jan 2023 02:24:53 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1673317487; 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=odciY+9+EikNajE585hIA5zUDol7M/v4VgDdpw0aLYY=; b=HVSSokT6hc5dGk+Q8ZOFuThkHGtZr+8Jgt31PDdATUG6CNI78ekzXh1BppySQE37RrL52Y gEjVy8u5Dhz9RIqLOxssFNjMGl08YDZaw2S6cC9Kp9zvntK4EjjXjGVt5KYSWaVpmUWsCD 7VxmkQ3HS0v7BOoy2dSGBRSNb0WIH2c= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-104-RNpvsEVsPr-9Y50zhF9Krg-1; Mon, 09 Jan 2023 21:24:44 -0500 X-MC-Unique: RNpvsEVsPr-9Y50zhF9Krg-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 9AEE2811E9C; Tue, 10 Jan 2023 02:24:43 +0000 (UTC) Received: from localhost (ovpn-12-27.pek2.redhat.com [10.72.12.27]) by smtp.corp.redhat.com (Postfix) with ESMTPS id E0C1A175AD; Tue, 10 Jan 2023 02:24:42 +0000 (UTC) Date: Tue, 10 Jan 2023 10:24:39 +0800 From: Baoquan He To: Thomas Gleixner Cc: linux-kernel@vger.kernel.org, x86@kernel.org, kexec@lists.infradead.org Subject: Re: [PATCH] Revert "x86/apic/x2apic: Implement IPI shorthands support" Message-ID: References: <87k01vjrnt.ffs@tglx> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <87k01vjrnt.ffs@tglx> X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230109_182452_617725_A43C7D16 X-CRM114-Status: GOOD ( 14.37 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org On 01/09/23 at 10:59pm, Thomas Gleixner wrote: > On Tue, Dec 20 2022 at 13:34, Baoquan He wrote: > > This reverts commit 43931d350f30c6cd8c2f498d54ef7d65750abc92. > > > > On kvm guest with 4 cpus deployed, when adding 'nr_cpus=2' to normal > > kernel's cmdline, and triggering crash to jump to kdump kernel, kdump > > kernel will stably hang. Reverting commit 43931d350f30 ("x86/apic/x2apic: > > Implement IPI shorthands support") can fix it. > > Is there any output on the early console or hangs it silently? > > If the latter, can you attach GDB to the guest and figure out where it > is stuck? No any output on the ealry console. I will try gdb debugging. Thanks. _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec