From patchwork Fri Jan 31 15:09:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Igor Mammedov X-Patchwork-Id: 11360189 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EA07213A4 for ; Fri, 31 Jan 2020 15:49:00 +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 C1135215A4 for ; Fri, 31 Jan 2020 15:49:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="A6VmMBkR" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C1135215A4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:55044 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ixYXT-0003gC-Ul for patchwork-qemu-devel@patchwork.kernel.org; Fri, 31 Jan 2020 10:48:59 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:40515) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ixXzJ-0006PU-Oh for qemu-devel@nongnu.org; Fri, 31 Jan 2020 10:13:42 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ixXzI-0007HI-Fu for qemu-devel@nongnu.org; Fri, 31 Jan 2020 10:13:41 -0500 Received: from us-smtp-1.mimecast.com ([205.139.110.61]:49379 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 1ixXzI-0007Eg-BP for qemu-devel@nongnu.org; Fri, 31 Jan 2020 10:13:40 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1580483620; 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=qFlJmEVcLwmk2kRmgYV4rlCnSFNVs2xVWMeGPm20hSY=; b=A6VmMBkRGFftYBtQaXoocbApeqboTZRiW/vjcL59SiolDGWs0OG9qjx/wMnoshN2PRNKwo wRgyqSajSJ7q9yfd5EPOnoIQppf43MQhHwvMXokbvIuLqqLucRtpSzOYHZUhhBxbGaD0ty Ahu0UlVgC8ucQKo4+afUqVjyP26L4VA= 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-366-27niGnmEP2i-1yf-w7f-6w-1; Fri, 31 Jan 2020 10:13:36 -0500 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 47346800D48; Fri, 31 Jan 2020 15:13:34 +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 168BC86C4B; Fri, 31 Jan 2020 15:13:31 +0000 (UTC) From: Igor Mammedov To: qemu-devel@nongnu.org Subject: [PATCH v4 74/80] exec: cleanup qemu_minrampagesize()/qemu_maxrampagesize() Date: Fri, 31 Jan 2020 16:09:44 +0100 Message-Id: <1580483390-131164-75-git-send-email-imammedo@redhat.com> In-Reply-To: <1580483390-131164-1-git-send-email-imammedo@redhat.com> References: <1580483390-131164-1-git-send-email-imammedo@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-MC-Unique: 27niGnmEP2i-1yf-w7f-6w-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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: thuth@redhat.com, aik@ozlabs.ru, mdroth@linux.vnet.ibm.com, qemu-ppc@nongnu.org, pbonzini@redhat.com, rth@twiddle.net, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.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 Reviewed-by: David Gibson --- v4: * fix access to uninitialized pagesize/hpsize (David Gibson ) CC: thuth@redhat.com CC: aik@ozlabs.ru CC: mdroth@linux.vnet.ibm.com CC: david@gibson.dropbear.id.au CC: qemu-ppc@nongnu.org CC: pbonzini@redhat.com CC: rth@twiddle.net --- exec.c | 49 ++++--------------------------------------------- 1 file changed, 4 insertions(+), 45 deletions(-) diff --git a/exec.c b/exec.c index 67e520d..9f5421c 100644 --- a/exec.c +++ b/exec.c @@ -1668,59 +1668,18 @@ 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; - } + 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 = 0; 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