From patchwork Wed Jan 15 15:07:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Igor Mammedov X-Patchwork-Id: 1223703 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=L0JaEk1D; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 47yXf66q9gz9sR0 for ; Thu, 16 Jan 2020 03:22:06 +1100 (AEDT) Received: from localhost ([::1]:56684 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1irlQi-0006sJ-HO for incoming@patchwork.ozlabs.org; Wed, 15 Jan 2020 11:22:04 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:50035) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1irkLA-0001Em-OC for qemu-devel@nongnu.org; Wed, 15 Jan 2020 10:12:21 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1irkL9-0000bC-52 for qemu-devel@nongnu.org; Wed, 15 Jan 2020 10:12:16 -0500 Received: from us-smtp-1.mimecast.com ([205.139.110.61]:24219 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1irkL9-0000b1-0H for qemu-devel@nongnu.org; Wed, 15 Jan 2020 10:12:15 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1579101134; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+3VFt3pNsNQjMhU9HjOQrUIHUzKUWbqZkz88Kdfo05k=; b=L0JaEk1D6KITOETXfmHD8lca/Njs9fjQ3cYnY5FXM4GGhGfi1tJR+dBe24zcy1kjpV8+80 uqJG6LsLZYHJq+J4J8LkaCMJ9+j8drbCYITNuNwQuHNBU3AZD0h7hlFdvKL6MySP+JAalk 9qbxB0DuFmYGsBUQN3sK9DahHZ4aLE4= 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-260-IZurhFSkNRax7X24pxmvFw-1; Wed, 15 Jan 2020 10:12:13 -0500 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 47942114291A; Wed, 15 Jan 2020 15:12:12 +0000 (UTC) Received: from dell-r430-03.lab.eng.brq.redhat.com (dell-r430-03.lab.eng.brq.redhat.com [10.37.153.18]) by smtp.corp.redhat.com (Postfix) with ESMTP id 7323119757; Wed, 15 Jan 2020 15:12:11 +0000 (UTC) From: Igor Mammedov To: qemu-devel@nongnu.org Subject: [PATCH v2 77/86] exec: cleanup qemu_minrampagesize()/qemu_maxrampagesize() Date: Wed, 15 Jan 2020 16:07:32 +0100 Message-Id: <1579100861-73692-78-git-send-email-imammedo@redhat.com> In-Reply-To: <1579100861-73692-1-git-send-email-imammedo@redhat.com> References: <1579100861-73692-1-git-send-email-imammedo@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-MC-Unique: IZurhFSkNRax7X24pxmvFw-1 X-Mimecast-Spam-Score: 0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 205.139.110.61 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: pbonzini@redhat.com, rth@twiddle.net Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Since all RAM is backed by hostmem backends, drop global -mem-path invariant and simplify code. Signed-off-by: Igor Mammedov --- CC: pbonzini@redhat.com CC: rth@twiddle.net --- exec.c | 51 +++++---------------------------------------------- 1 file changed, 5 insertions(+), 46 deletions(-) diff --git a/exec.c b/exec.c index d4b769d..7b6e376 100644 --- a/exec.c +++ b/exec.c @@ -1667,60 +1667,19 @@ static int find_max_backend_pagesize(Object *obj, void *opaque) */ long qemu_minrampagesize(void) { - long hpsize = LONG_MAX; - long mainrampagesize; - Object *memdev_root; - MachineState *ms = MACHINE(qdev_get_machine()); - - mainrampagesize = qemu_mempath_getpagesize(mem_path); - - /* it's possible we have memory-backend objects with - * hugepage-backed RAM. these may get mapped into system - * address space via -numa parameters or memory hotplug - * hooks. we want to take these into account, but we - * also want to make sure these supported hugepage - * sizes are applicable across the entire range of memory - * we may boot from, so we take the min across all - * backends, and assume normal pages in cases where a - * backend isn't backed by hugepages. - */ - memdev_root = object_resolve_path("/objects", NULL); - if (memdev_root) { - object_child_foreach(memdev_root, find_min_backend_pagesize, &hpsize); - } - if (hpsize == LONG_MAX) { - /* No additional memory regions found ==> Report main RAM page size */ - return mainrampagesize; - } - - /* If NUMA is disabled or the NUMA nodes are not backed with a - * memory-backend, then there is at least one node using "normal" RAM, - * so if its page size is smaller we have got to report that size instead. - */ - if (hpsize > mainrampagesize && - (ms->numa_state == NULL || - ms->numa_state->num_nodes == 0 || - ms->numa_state->nodes[0].node_memdev == NULL)) { - static bool warned; - if (!warned) { - error_report("Huge page support disabled (n/a for main memory)."); - warned = true; - } - return mainrampagesize; - } + long hpsize; + Object *memdev_root = object_resolve_path("/objects", NULL); + object_child_foreach(memdev_root, find_min_backend_pagesize, &hpsize); return hpsize; } long qemu_maxrampagesize(void) { - long pagesize = qemu_mempath_getpagesize(mem_path); + long pagesize; Object *memdev_root = object_resolve_path("/objects", NULL); - if (memdev_root) { - object_child_foreach(memdev_root, find_max_backend_pagesize, - &pagesize); - } + object_child_foreach(memdev_root, find_max_backend_pagesize, &pagesize); return pagesize; } #else