From patchwork Fri Nov 20 08:51:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhukeqian X-Patchwork-Id: 11919695 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 85588C63777 for ; Fri, 20 Nov 2020 08:57:12 +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 E4A3222256 for ; Fri, 20 Nov 2020 08:57:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E4A3222256 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:36334 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kg2EA-0000td-PE for qemu-devel@archiver.kernel.org; Fri, 20 Nov 2020 03:57:10 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:56498) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kg2AQ-0005p2-Ex; Fri, 20 Nov 2020 03:53:18 -0500 Received: from szxga05-in.huawei.com ([45.249.212.191]:2534) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kg2AN-0001Uj-Oh; Fri, 20 Nov 2020 03:53:17 -0500 Received: from DGGEMS414-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4Ccr0W0Yh1zhdXB; Fri, 20 Nov 2020 16:52:43 +0800 (CST) Received: from DESKTOP-5IS4806.china.huawei.com (10.174.187.37) by DGGEMS414-HUB.china.huawei.com (10.3.19.214) with Microsoft SMTP Server id 14.3.487.0; Fri, 20 Nov 2020 16:52:52 +0800 From: Keqian Zhu To: , Paolo Bonzini , "Dr . David Alan Gilbert" Subject: [RFC PATCH 2/2] ramlist: Resize dirty bitmap blocks after remove ramblock Date: Fri, 20 Nov 2020 16:51:57 +0800 Message-ID: <20201120085157.7136-3-zhukeqian1@huawei.com> X-Mailer: git-send-email 2.8.4.windows.1 In-Reply-To: <20201120085157.7136-1-zhukeqian1@huawei.com> References: <20201120085157.7136-1-zhukeqian1@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.187.37] X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.191; envelope-from=zhukeqian1@huawei.com; helo=szxga05-in.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, 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: wanghaibin.wang@huawei.com, qemu-arm@nongnu.org, Keqian Zhu Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Use the new "dirty_bitmap_resize" interface to reduce dirty bitmap blocks after we remove a ramblock from ramlist. Signed-off-by: Keqian Zhu --- softmmu/physmem.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/softmmu/physmem.c b/softmmu/physmem.c index f6ff78378e..2a17e0a89a 100644 --- a/softmmu/physmem.c +++ b/softmmu/physmem.c @@ -2131,6 +2131,8 @@ static void reclaim_ramblock(RAMBlock *block) void qemu_ram_free(RAMBlock *block) { + ram_addr_t old_ram_size, new_ram_size; + if (!block) { return; } @@ -2140,12 +2142,18 @@ void qemu_ram_free(RAMBlock *block) } qemu_mutex_lock_ramlist(); + + old_ram_size = last_ram_page(); QLIST_REMOVE_RCU(block, next); + new_ram_size = last_ram_page(); + dirty_bitmap_resize(old_ram_size, new_ram_size); + ram_list.mru_block = NULL; /* Write list before version */ smp_wmb(); ram_list.version++; call_rcu(block, reclaim_ramblock, rcu); + qemu_mutex_unlock_ramlist(); }