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 A841EC433EF for ; Wed, 13 Oct 2021 10:36:24 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 37DDE60F94 for ; Wed, 13 Oct 2021 10:36:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 37DDE60F94 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:45578 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mabcT-0007ml-SM for qemu-devel@archiver.kernel.org; Wed, 13 Oct 2021 06:36:21 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45696) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mabaY-0005Xi-6f for qemu-devel@nongnu.org; Wed, 13 Oct 2021 06:34:24 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:48352) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mabaU-0001gG-Js for qemu-devel@nongnu.org; Wed, 13 Oct 2021 06:34:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1634121257; 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=eiq5vh3dCNHXTt2L9OzYv4MKu2jV8o9+6xs4ComEFdU=; b=iD8R2w65GO81wRvT3yGDDS3svIrVPFEZe+PJfKBxAkhqH6nI+x/aksZp3DeiHtSx1+RHC8 jheyhj2xyvq/wk3lgCFxUNFgTYnEVBNtuPtl58rflDI3CYHaB016kuRMTqh0RHDx4zMgdV STcSBkJbRoQqfseavFZ5TBL0J8BiZ+w= 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-291-HnIIzyQSMuCRRQdXCqwBtA-1; Wed, 13 Oct 2021 06:34:16 -0400 X-MC-Unique: HnIIzyQSMuCRRQdXCqwBtA-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id BDCB4100CCC1; Wed, 13 Oct 2021 10:34:14 +0000 (UTC) Received: from t480s.redhat.com (unknown [10.39.194.27]) by smtp.corp.redhat.com (Postfix) with ESMTP id C2D3F5D9D5; Wed, 13 Oct 2021 10:33:50 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Subject: [PATCH RFC 01/15] memory: Drop mapping check from memory_region_get_ram_discard_manager() Date: Wed, 13 Oct 2021 12:33:16 +0200 Message-Id: <20211013103330.26869-2-david@redhat.com> In-Reply-To: <20211013103330.26869-1-david@redhat.com> References: <20211013103330.26869-1-david@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Received-SPF: pass client-ip=216.205.24.124; envelope-from=david@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.049, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Eduardo Habkost , kvm@vger.kernel.org, "Michael S. Tsirkin" , Richard Henderson , David Hildenbrand , Stefan Hajnoczi , "Dr . David Alan Gilbert" , Peter Xu , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Igor Mammedov , Ani Sinha , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" It's sufficient to check whether a memory region is RAM, the region doesn't necessarily have to be mapped into another memory region. For example, RAM memory regions mapped via an alias will never make "memory_region_is_mapped()" succeed. Signed-off-by: David Hildenbrand --- softmmu/memory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/softmmu/memory.c b/softmmu/memory.c index 3bcfc3899b..8669f78395 100644 --- a/softmmu/memory.c +++ b/softmmu/memory.c @@ -2038,7 +2038,7 @@ int memory_region_iommu_num_indexes(IOMMUMemoryRegion *iommu_mr) RamDiscardManager *memory_region_get_ram_discard_manager(MemoryRegion *mr) { - if (!memory_region_is_mapped(mr) || !memory_region_is_ram(mr)) { + if (!memory_region_is_ram(mr)) { return NULL; } return mr->rdm; -- 2.31.1