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 7E2AFEE57DF for ; Mon, 11 Sep 2023 13:19:23 +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:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=2fKbbItV/cG2bibwPuLvstxwaeRozFdt7J3w2QJtPc0=; b=0Kgh7m5O8ORIsh HHvZ9j9NZogkCr2ovIvsaIfv+l8/nQJP+yZhgAZYm6uFBAB4fjwH9WYFSqkAUCfRSatUHfLt/8Sez gxK9D/kZPuIbFSg/sKSPtbwgul/TCSAzo5LINtpm337jafpWwXhKxyzIeGVOyoOKrxyECYt1h/N6L bWbPO6nFDtw+CdATT9NuKm2OgAW8VNFG0TesZwpOZNbfaA9Lyhr8BkzTaycbCvBuXgU+YQdoCT0F1 GQfK3AVtN/ZVdmKgtEikVGmLrHYGktF21QQWJn0SgiHdyMtQMVfiU0qT9k6uQuBMKA2lXpjCs0mY5 K05Lem/pDUagrnyPNCrg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qfgox-000alQ-1S; Mon, 11 Sep 2023 13:19:19 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qfgou-000akY-10 for kexec@lists.infradead.org; Mon, 11 Sep 2023 13:19:18 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1694438350; 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: content-transfer-encoding:content-transfer-encoding; bh=23bwaDVIUeu1xrOkLjrcpotMczUMf0CbTLoopyLaEdA=; b=Sn+QnYEa6g/wejjVptVB/861Uk9ov0+94kvwSgu0PCCZM64cGPtwy9iqC2iiGDuC8sE8iC zqGsFzm+xNwSqasykHgwijDo0Gs7p0Vn+vAPqYAJsYqG+MlYF65CexnJNodcw3rJtZ6ACd 0BYBoT003h+z2aiJvxEjqcGKS3UU9XU= 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-33-6aQ1HiQLPTmuF6_IFR5hlw-1; Mon, 11 Sep 2023 09:19:05 -0400 X-MC-Unique: 6aQ1HiQLPTmuF6_IFR5hlw-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 26680101A529; Mon, 11 Sep 2023 13:19:05 +0000 (UTC) Received: from piliu.users.ipa.redhat.com (unknown [10.72.120.8]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8DE692156701; Mon, 11 Sep 2023 13:19:00 +0000 (UTC) From: Pingfan Liu To: linuxppc-dev@lists.ozlabs.org Cc: Pingfan Liu , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Mahesh Salgaonkar , Wen Xiong , Baoquan He , Ming Lei , kexec@lists.infradead.org Subject: [PATCHv6 0/3] enable nr_cpus for powerpc Date: Mon, 11 Sep 2023 21:18:52 +0800 Message-Id: <20230911131855.40738-1-piliu@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230911_061916_499409_F505BEDD X-CRM114-Status: UNSURE ( 9.36 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org Since my last v4 [1], the code has undergone great changes. The paca[] array has been reorganized and indexed by paca_ptrs[], which dramatically decreases the memory consumption even if there are many unpresent cpus in the middle. However, reordering the logical cpu numbers can further decrease the size of paca_ptrs[] in the kdump case. So I keep [1/3], which rotate-shifts the cpu's sequence number in the device tree to obtain the logical cpu id. Patch [2-3/3] make efforts to decrease the nr_cpus to be less than or equal to two. [1]: https://lore.kernel.org/linuxppc-dev/1520829790-14029-1-git-send-email-kernelfans@gmail.com/ Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Christophe Leroy Cc: Mahesh Salgaonkar Cc: Wen Xiong Cc: Baoquan He Cc: Ming Lei Cc: kexec@lists.infradead.org To: linuxppc-dev@lists.ozlabs.org v5 -> v6: assign nr_cpu_ids by set_nr_cpu_ids() to tackle with the issue if nr_cpu_ids is configured as a constant Pingfan Liu (3): powerpc/setup: Loosen the mapping between cpu logical id and its seq in dt powerpc/setup: Handle the case when boot_cpuid greater than nr_cpus powerpc/setup: alloc extra paca_ptrs to hold boot_cpuid arch/powerpc/kernel/paca.c | 10 +-- arch/powerpc/kernel/prom.c | 28 +++++--- arch/powerpc/kernel/setup-common.c | 106 ++++++++++++++++++++++++----- 3 files changed, 113 insertions(+), 31 deletions(-) -- 2.31.1 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec