From patchwork Tue Jun 28 09:01:30 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Lieven X-Patchwork-Id: 9202339 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9F6786075F for ; Tue, 28 Jun 2016 09:20:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8386A28558 for ; Tue, 28 Jun 2016 09:20:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 74669285D1; Tue, 28 Jun 2016 09:20:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 0838B28558 for ; Tue, 28 Jun 2016 09:20:21 +0000 (UTC) Received: from localhost ([::1]:35256 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bHpBs-0002fg-3k for patchwork-qemu-devel@patchwork.kernel.org; Tue, 28 Jun 2016 05:20:20 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34894) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bHouV-000766-PN for qemu-devel@nongnu.org; Tue, 28 Jun 2016 05:02:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bHouR-0003Q2-NT for qemu-devel@nongnu.org; Tue, 28 Jun 2016 05:02:23 -0400 Received: from mx-v6.kamp.de ([2a02:248:0:51::16]:50124 helo=mx01.kamp.de) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bHouR-0003Pn-Dt for qemu-devel@nongnu.org; Tue, 28 Jun 2016 05:02:19 -0400 Received: (qmail 27397 invoked by uid 89); 28 Jun 2016 09:02:18 -0000 Received: from [195.62.97.28] by client-16-kamp (envelope-from , uid 89) with qmail-scanner-2010/03/19-MF (clamdscan: 0.99.2/21804. hbedv: 8.3.40.44/7.12.99.34. avast: 1.2.2/16062800. spamassassin: 3.4.1. Clear:RC:1(195.62.97.28):. Processed in 0.347511 secs); 28 Jun 2016 09:02:18 -0000 Received: from smtp.kamp.de (HELO submission.kamp.de) ([195.62.97.28]) by mx01.kamp.de with ESMTPS (DHE-RSA-AES256-GCM-SHA384 encrypted); 28 Jun 2016 09:02:15 -0000 X-GL_Whitelist: yes Received: (qmail 29661 invoked from network); 28 Jun 2016 09:01:47 -0000 Received: from lieven-pc.kamp-intra.net (HELO lieven-pc) (relay@kamp.de@::ffff:172.21.12.60) by submission.kamp.de with ESMTPS (DHE-RSA-AES256-GCM-SHA384 encrypted) ESMTPA; 28 Jun 2016 09:01:47 -0000 Received: by lieven-pc (Postfix, from userid 1000) id 4F10A2085F; Tue, 28 Jun 2016 11:01:46 +0200 (CEST) From: Peter Lieven To: qemu-devel@nongnu.org Date: Tue, 28 Jun 2016 11:01:30 +0200 Message-Id: <1467104499-27517-7-git-send-email-pl@kamp.de> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1467104499-27517-1-git-send-email-pl@kamp.de> References: <1467104499-27517-1-git-send-email-pl@kamp.de> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2a02:248:0:51::16 Subject: [Qemu-devel] [PATCH 06/15] exec: use mmap for subpages X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, peter.maydell@linaro.org, mst@redhat.com, Peter Lieven , dgilbert@redhat.com, mreitz@redhat.com, kraxel@redhat.com, pbonzini@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP a lot of subpages are created and freed at startup, but RCU delays the freeing so the heap gets fragmented. Signed-off-by: Peter Lieven --- exec.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/exec.c b/exec.c index 0122ef7..1b7be2a 100644 --- a/exec.c +++ b/exec.c @@ -49,6 +49,7 @@ #include "exec/cpu-all.h" #include "qemu/rcu_queue.h" #include "qemu/main-loop.h" +#include "qemu/mmap-alloc.h" #include "translate-all.h" #include "sysemu/replay.h" @@ -1150,7 +1151,7 @@ static void phys_section_destroy(MemoryRegion *mr) if (have_sub_page) { subpage_t *subpage = container_of(mr, subpage_t, iomem); object_unref(OBJECT(&subpage->iomem)); - g_free(subpage); + qemu_anon_ram_munmap(subpage, sizeof(subpage_t)); } } @@ -2270,7 +2271,7 @@ static subpage_t *subpage_init(AddressSpace *as, hwaddr base) { subpage_t *mmio; - mmio = g_malloc0(sizeof(subpage_t)); + mmio = qemu_anon_ram_mmap(sizeof(subpage_t)); mmio->as = as; mmio->base = base;