From nobody Thu Nov 13 22:02:54 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1583418897; cv=none; d=zohomail.com; s=zohoarc; b=m5ch2oFPoDl18h49qB8wni/srtz2wsvNrN5Ma07a93Azv5fOkVA/4l9jMQlKjwyCLgVhCh+FFpwusJBxMG2KMYbt8TPyGyuDT9btMb1kmvdu4R/ZdEjfK2wOFC0IW+TY6U//iqSlgQ2rLZ4OkQifXO2oQ5kcPoSQiwZuf7jtjac= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1583418897; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=H1vGZKqDhRtg8g2lSBh3C+rY8EjMrCl2v+tMPCxz9io=; b=m5jBwMvqPGrttr5g9aqe3V+wfNPGtyCs4YWvf2WLITGD16YgtLUEOjAGG53oorwEwXWzFstq/kERlYmUMNQkDVbiucBVaGHSao9bpBP3+1QqysnEUr3FAvwAHun+jS9P80DUu8E1A2Qr9ci/RwRDO8plSi4Jttm8I8SCzMpKPTI= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1583418897287824.9438967134469; Thu, 5 Mar 2020 06:34:57 -0800 (PST) Received: from localhost ([::1]:50320 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j9raS-0004qe-7W for importer@patchew.org; Thu, 05 Mar 2020 09:34:56 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:35577) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j9rXN-0007rT-Ph for qemu-devel@nongnu.org; Thu, 05 Mar 2020 09:31:50 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1j9rXI-0002rW-MP for qemu-devel@nongnu.org; Thu, 05 Mar 2020 09:31:45 -0500 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:53051 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 1j9rXI-0002rD-I0 for qemu-devel@nongnu.org; Thu, 05 Mar 2020 09:31:40 -0500 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-32-5rRkZvsoMnC8HeoaK5BQaA-1; Thu, 05 Mar 2020 09:31:38 -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 5B4DA107ACC4; Thu, 5 Mar 2020 14:31:34 +0000 (UTC) Received: from t480s.redhat.com (ovpn-120-166.rdu2.redhat.com [10.10.120.166]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4724F90538; Thu, 5 Mar 2020 14:31:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1583418700; 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: in-reply-to:in-reply-to:references:references; bh=H1vGZKqDhRtg8g2lSBh3C+rY8EjMrCl2v+tMPCxz9io=; b=MsYyAbrOF3gFRlQ7tnAYc72bXbR1dzCc/70ZkX7iCtmznTo0zUuli3RmNKclJawXsxCstG ceHAE7uAe0Uj7g5u2xwXwkYuhPJ5W1gL8kZaS5Lno0/CJWfYKR63Qqfhc8pVwl3ABS9D8l 2P2NJB0OtlLtboXNhtr7+shFhy/6g48= X-MC-Unique: 5rRkZvsoMnC8HeoaK5BQaA-1 From: David Hildenbrand To: qemu-devel@nongnu.org Subject: [PATCH v4 04/15] exec: Factor out setting ram settings (madvise ...) into qemu_ram_apply_settings() Date: Thu, 5 Mar 2020 15:29:34 +0100 Message-Id: <20200305142945.216465-5-david@redhat.com> In-Reply-To: <20200305142945.216465-1-david@redhat.com> References: <20200305142945.216465-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable 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: Eduardo Habkost , "Michael S . Tsirkin" , Richard Henderson , Igor Kotrasinski , David Hildenbrand , "Dr . David Alan Gilbert" , Peter Xu , Murilo Opsfelder Araujo , Igor Mammedov , Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Factor all settings out into qemu_ram_apply_settings(). For memory_try_enable_merging(), the important bit is that it won't be called with XEN - which is now still the case as new_block->host will remain NULL. Reviewed-by: Richard Henderson Reviewed-by: Peter Xu Cc: Richard Henderson Cc: Paolo Bonzini Cc: Igor Mammedov Signed-off-by: David Hildenbrand --- exec.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-) diff --git a/exec.c b/exec.c index 3e980e14e0..13a0ca91fb 100644 --- a/exec.c +++ b/exec.c @@ -2069,6 +2069,21 @@ static int memory_try_enable_merging(void *addr, siz= e_t len) return qemu_madvise(addr, len, QEMU_MADV_MERGEABLE); } =20 +static void qemu_ram_apply_settings(void *host, size_t length) +{ + memory_try_enable_merging(host, length); + qemu_ram_setup_dump(host, length); + qemu_madvise(host, length, QEMU_MADV_HUGEPAGE); + /* + * MADV_DONTFORK is also needed by KVM in absence of synchronous MMU + * Configure it unless the machine is a qtest server, in which case KV= M is + * not used and it may be forked (eg for fuzzing purposes). + */ + if (!qtest_enabled()) { + qemu_madvise(host, length, QEMU_MADV_DONTFORK); + } +} + /* * Resizing RAM while migrating can result in the migration being canceled. * Care has to be taken if the guest might have already detected the memor= y. @@ -2227,7 +2242,6 @@ static void ram_block_add(RAMBlock *new_block, Error = **errp, bool shared) qemu_mutex_unlock_ramlist(); return; } - memory_try_enable_merging(new_block->host, new_block->max_leng= th); } } =20 @@ -2265,17 +2279,7 @@ static void ram_block_add(RAMBlock *new_block, Error= **errp, bool shared) DIRTY_CLIENTS_ALL); =20 if (new_block->host) { - qemu_ram_setup_dump(new_block->host, new_block->max_length); - qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_HUG= EPAGE); - /* - * MADV_DONTFORK is also needed by KVM in absence of synchronous M= MU - * Configure it unless the machine is a qtest server, in which case - * KVM is not used and it may be forked (eg for fuzzing purposes). - */ - if (!qtest_enabled()) { - qemu_madvise(new_block->host, new_block->max_length, - QEMU_MADV_DONTFORK); - } + qemu_ram_apply_settings(new_block->host, new_block->max_length); ram_block_notify_add(new_block->host, new_block->used_length, new_block->max_length); } --=20 2.24.1