From nobody Wed May 1 20:24:29 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1491486603288859.5893306867225; Thu, 6 Apr 2017 06:50:03 -0700 (PDT) Received: from localhost ([::1]:45951 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cw7nW-0007Dc-4y for importer@patchew.org; Thu, 06 Apr 2017 09:50:02 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52048) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cw7Et-0001YS-Qc for qemu-devel@nongnu.org; Thu, 06 Apr 2017 09:14:20 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cw7Er-000251-BQ for qemu-devel@nongnu.org; Thu, 06 Apr 2017 09:14:15 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35002) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cw7Er-00023q-31 for qemu-devel@nongnu.org; Thu, 06 Apr 2017 09:14:13 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2C3BF3DBCB for ; Thu, 6 Apr 2017 13:14:12 +0000 (UTC) Received: from secure.mitica (ovpn-117-221.ams2.redhat.com [10.36.117.221]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0B67F7E20D; Thu, 6 Apr 2017 13:14:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 2C3BF3DBCB Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=quintela@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 2C3BF3DBCB From: Juan Quintela To: qemu-devel@nongnu.org Date: Thu, 6 Apr 2017 15:14:08 +0200 Message-Id: <20170406131408.2524-2-quintela@redhat.com> In-Reply-To: <20170406131408.2524-1-quintela@redhat.com> References: <20170406131408.2524-1-quintela@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Thu, 06 Apr 2017 13:14:12 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH] ram: Remove migration_bitmap_extend() 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: dgilbert@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" We have disabled memory hotplug, so we don't need to handle migration_bitamp there. Signed-off-by: Juan Quintela --- exec.c | 1 - include/exec/ram_addr.h | 2 -- migration/ram.c | 34 ---------------------------------- 3 files changed, 37 deletions(-) diff --git a/exec.c b/exec.c index de843f4..c2def9e 100644 --- a/exec.c +++ b/exec.c @@ -1758,7 +1758,6 @@ static void ram_block_add(RAMBlock *new_block, Error = **errp) new_ram_size =3D MAX(old_ram_size, (new_block->offset + new_block->max_length) >> TARGET_PAGE_B= ITS); if (new_ram_size > old_ram_size) { - migration_bitmap_extend(old_ram_size, new_ram_size); dirty_memory_extend(old_ram_size, new_ram_size); } /* Keep the list sorted from biggest to smallest block. Unlike QTAILQ, diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h index a8411c7..c9ddcd0 100644 --- a/include/exec/ram_addr.h +++ b/include/exec/ram_addr.h @@ -413,7 +413,5 @@ uint64_t cpu_physical_memory_sync_dirty_bitmap(unsigned= long *dest, =20 return num_dirty; } - -void migration_bitmap_extend(ram_addr_t old, ram_addr_t new); #endif #endif diff --git a/migration/ram.c b/migration/ram.c index 92d6ff7..f05080f 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -1496,40 +1496,6 @@ static void ram_state_reset(RAMState *rs) =20 #define MAX_WAIT 50 /* ms, half buffered_file limit */ =20 -void migration_bitmap_extend(ram_addr_t old, ram_addr_t new) -{ - RAMState *rs =3D &ram_state; - - /* called in qemu main thread, so there is - * no writing race against this migration_bitmap - */ - if (rs->ram_bitmap) { - RAMBitmap *old_bitmap =3D rs->ram_bitmap, *bitmap; - bitmap =3D g_new(RAMBitmap, 1); - bitmap->bmap =3D bitmap_new(new); - - /* prevent migration_bitmap content from being set bit - * by migration_bitmap_sync_range() at the same time. - * it is safe to migration if migration_bitmap is cleared bit - * at the same time. - */ - qemu_mutex_lock(&rs->bitmap_mutex); - bitmap_copy(bitmap->bmap, old_bitmap->bmap, old); - bitmap_set(bitmap->bmap, old, new - old); - - /* We don't have a way to safely extend the sentmap - * with RCU; so mark it as missing, entry to postcopy - * will fail. - */ - bitmap->unsentmap =3D NULL; - - atomic_rcu_set(&rs->ram_bitmap, bitmap); - qemu_mutex_unlock(&rs->bitmap_mutex); - rs->migration_dirty_pages +=3D new - old; - call_rcu(old_bitmap, migration_bitmap_free, rcu); - } -} - /* * 'expected' is the value you expect the bitmap mostly to be full * of; it won't bother printing lines that are all this value. --=20 2.9.3