From nobody Mon Feb 9 02:51:17 2026 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 1487961877648964.5666620404938; Fri, 24 Feb 2017 10:44:37 -0800 (PST) Received: from localhost ([::1]:39317 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1chKr6-0000XN-39 for importer@patchew.org; Fri, 24 Feb 2017 13:44:36 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53440) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1chKbw-0000wn-Hc for qemu-devel@nongnu.org; Fri, 24 Feb 2017 13:28:59 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1chKbv-0007xk-ES for qemu-devel@nongnu.org; Fri, 24 Feb 2017 13:28:56 -0500 Received: from mx1.redhat.com ([209.132.183.28]:36388) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1chKbv-0007xK-96 for qemu-devel@nongnu.org; Fri, 24 Feb 2017 13:28:55 -0500 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 76257C04BD37 for ; Fri, 24 Feb 2017 18:28:55 +0000 (UTC) Received: from dgilbert-t530.redhat.com (ovpn-117-182.ams2.redhat.com [10.36.117.182]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v1OISjTY002473; Fri, 24 Feb 2017 13:28:54 -0500 From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, quintela@redhat.com, lvivier@redhat.com Date: Fri, 24 Feb 2017 18:28:34 +0000 Message-Id: <20170224182844.32452-7-dgilbert@redhat.com> In-Reply-To: <20170224182844.32452-1-dgilbert@redhat.com> References: <20170224182844.32452-1-dgilbert@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Fri, 24 Feb 2017 18:28:55 +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 v3 06/16] postcopy: Record largest page size 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: aarcange@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" From: "Dr. David Alan Gilbert" Record the largest page size in use; we'll need it soon for allocating temporary buffers. Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Juan Quintela Reviewed-by: Laurent Vivier --- exec.c | 13 +++++++++++++ include/exec/cpu-common.h | 1 + include/migration/migration.h | 1 + migration/migration.c | 1 + 4 files changed, 16 insertions(+) diff --git a/exec.c b/exec.c index ec3a11f..099794a 100644 --- a/exec.c +++ b/exec.c @@ -1524,6 +1524,19 @@ size_t qemu_ram_pagesize(RAMBlock *rb) return rb->page_size; } =20 +/* Returns the largest size of page in use */ +size_t qemu_ram_pagesize_largest(void) +{ + RAMBlock *block; + size_t largest =3D 0; + + QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + largest =3D MAX(largest, qemu_ram_pagesize(block)); + } + + return largest; +} + static int memory_try_enable_merging(void *addr, size_t len) { if (!machine_mem_merge(current_machine)) { diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index 1350c2e..8c305aa 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -64,6 +64,7 @@ void qemu_ram_set_idstr(RAMBlock *block, const char *name= , DeviceState *dev); void qemu_ram_unset_idstr(RAMBlock *block); const char *qemu_ram_get_idstr(RAMBlock *rb); size_t qemu_ram_pagesize(RAMBlock *block); +size_t qemu_ram_pagesize_largest(void); =20 void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf, int len, int is_write); diff --git a/include/migration/migration.h b/include/migration/migration.h index aafa68f..e8e2a7f 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -92,6 +92,7 @@ struct MigrationIncomingState { */ QemuEvent main_thread_load_event; =20 + size_t largest_page_size; bool have_fault_thread; QemuThread fault_thread; QemuSemaphore fault_thread_sem; diff --git a/migration/migration.c b/migration/migration.c index c6ae69d..869697e 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -383,6 +383,7 @@ static void process_incoming_migration_co(void *opaque) int ret; =20 mis->from_src_file =3D f; + mis->largest_page_size =3D qemu_ram_pagesize_largest(); postcopy_state_set(POSTCOPY_INCOMING_NONE); migrate_set_state(&mis->state, MIGRATION_STATUS_NONE, MIGRATION_STATUS_ACTIVE); --=20 2.9.3