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 3B945C433F5 for ; Wed, 29 Sep 2021 14:37:24 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id DE45961406 for ; Wed, 29 Sep 2021 14:37:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org DE45961406 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 78DBA940030; Wed, 29 Sep 2021 10:37:23 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 713B6940020; Wed, 29 Sep 2021 10:37:23 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 58E3D940030; Wed, 29 Sep 2021 10:37:23 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0116.hostedemail.com [216.40.44.116]) by kanga.kvack.org (Postfix) with ESMTP id 444FC940020 for ; Wed, 29 Sep 2021 10:37:23 -0400 (EDT) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 0398627DD3 for ; Wed, 29 Sep 2021 14:37:23 +0000 (UTC) X-FDA: 78640863966.30.E248950 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by imf24.hostedemail.com (Postfix) with ESMTP id 957BEB0000A4 for ; Wed, 29 Sep 2021 14:37:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1632926242; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hw0JON3PSPNzJHfAUlyfJy6KTExGOX1e2ePjdnrAKBE=; b=ErXBGsmlTsBqooD5ykB9qYw48gUG2aybKLFTrOL79/JBjiX/Y6vBttdGSvdlwPvuPo79bP Yl4auRUU9WNWPmwFKuE3zXl5bL6eWqh+Z7wjqhGpL3dopMX+JjxPYRjKlzQTEktbcO6WcL 78JIBoY3muQGOOf0ni3OpzR3EYp2oik= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-519-Xso30JzGNKapCJmAP5WIeA-1; Wed, 29 Sep 2021 10:37:18 -0400 X-MC-Unique: Xso30JzGNKapCJmAP5WIeA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id F1D29802C94; Wed, 29 Sep 2021 14:37:14 +0000 (UTC) Received: from t480s.redhat.com (unknown [10.39.195.135]) by smtp.corp.redhat.com (Postfix) with ESMTP id C6CE510016F4; Wed, 29 Sep 2021 14:37:08 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: David Hildenbrand , Andrew Morton , Jonathan Corbet , Alex Shi , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Greg Kroah-Hartman , "Rafael J. Wysocki" , "Michael S. Tsirkin" , Jason Wang , Shuah Khan , Michal Hocko , Oscar Salvador , Mike Rapoport , x86@kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, virtualization@lists.linux-foundation.org Subject: [PATCH v1 3/6] mm/memory_hotplug: restrict CONFIG_MEMORY_HOTPLUG to 64 bit Date: Wed, 29 Sep 2021 16:35:57 +0200 Message-Id: <20210929143600.49379-4-david@redhat.com> In-Reply-To: <20210929143600.49379-1-david@redhat.com> References: <20210929143600.49379-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 957BEB0000A4 X-Stat-Signature: 85gjou7iaxmkaf831oencso7n7fwkd43 Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=ErXBGsml; spf=none (imf24.hostedemail.com: domain of david@redhat.com has no SPF policy when checking 216.205.24.124) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com X-HE-Tag: 1632926242-40702 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 32 bit support is broken in various ways: for example, we can online memory that should actually go to ZONE_HIGHMEM to ZONE_MOVABLE or in some cases even to one of the other kernel zones. We marked it BROKEN in commit b59d02ed0869 ("mm/memory_hotplug: disable t= he functionality for 32b") almost one year ago. According to that commit it might be broken at least since 2017. Further, there is hardly a sane u= se case nowadays. Let's just depend completely on 64bit, dropping the "BROKEN" dependency t= o make clear that we are not going to support it again. Next, we'll remove some HIGHMEM leftovers from memory hotplug code to clean up. Signed-off-by: David Hildenbrand --- mm/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/Kconfig b/mm/Kconfig index ea8762cd8e1e..88273dd5c6d6 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -125,7 +125,7 @@ config MEMORY_HOTPLUG select MEMORY_ISOLATION depends on SPARSEMEM depends on ARCH_ENABLE_MEMORY_HOTPLUG - depends on 64BIT || BROKEN + depends on 64BIT select NUMA_KEEP_MEMINFO if NUMA =20 config MEMORY_HOTPLUG_DEFAULT_ONLINE --=20 2.31.1