From nobody Tue Nov 26 08:57:18 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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=pass(p=quarantine dis=none) header.from=bytedance.com ARC-Seal: i=1; a=rsa-sha256; t=1709260295; cv=none; d=zohomail.com; s=zohoarc; b=Ft1MqEjOgKolovvZpKUWEwyN0OtXptGYMD8Q7ghvSoqiH5hjn5Yu9ka5WYRS+o15BrSjWExCSYwDNLhxrqSj2QlPlviY3CwKMvcxDmlIARcrdTKpR4i/cgYBmxo+Mp2mmoq4gTMSN+wZyx7Tn2XlRtU5frNq8XPpDTnF7v+rc8s= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1709260295; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=Sb2DGHjJyDbpFDS1zLN6i0Hdzzb38omi0MKX/F3Yb7c=; b=FvnUjk4xPVEW28PjXeC+fqV94znsD0T0eJc55VQ1Nn43BmUWl6ksUvnWWSwRen3bzCaSjlji92dNzljE1n0zPyqqFzhfBDPhlSev9yFRUVX7DfsjySupwIAmWDMrcbHc8+ncuHlBtoDIShYUMNpHk5KDClukEKMjAEUAuf/qlXU= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; 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=pass header.from= (p=quarantine dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1709260295252590.7046925368229; Thu, 29 Feb 2024 18:31:35 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rfseQ-0003xC-DF; Thu, 29 Feb 2024 21:29:30 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rfseO-0003x0-DL for qemu-devel@nongnu.org; Thu, 29 Feb 2024 21:29:28 -0500 Received: from mail-qv1-xf2f.google.com ([2607:f8b0:4864:20::f2f]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1rfseL-0005Ou-WF for qemu-devel@nongnu.org; Thu, 29 Feb 2024 21:29:28 -0500 Received: by mail-qv1-xf2f.google.com with SMTP id 6a1803df08f44-68f74fb38a8so6390486d6.3 for ; Thu, 29 Feb 2024 18:29:24 -0800 (PST) Received: from n231-230-216.byted.org ([130.44.212.120]) by smtp.gmail.com with ESMTPSA id qo13-20020a056214590d00b0068d11cf887bsm1384107qvb.55.2024.02.29.18.29.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Feb 2024 18:29:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1709260164; x=1709864964; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Sb2DGHjJyDbpFDS1zLN6i0Hdzzb38omi0MKX/F3Yb7c=; b=X9ngEd2gGSkj/ra/NnNRx/L339X90jCFzGq3FbB5DQnPnzCiraU9puDLijqqSaKsdU cbz+Mgq1Z9YaXzx1Pj3Y6kipYzkg8bGRSeE6N1orb9oSxz+y7KeNyFAPZowBP04thksI 1bJWPphtQohaz1simmsgiiqiJsltrnRDbFKk/mFXsvE0BLVdX0L2snbvBfH4J/CAI6GP xQoCvD4A5oYBoGAjD6kXkBoRtIWU/+5BUabshfjjm8EOmnSDV38jJqJP6PmYyUPY9A9W sc2/PnxXfzdxoBepc7jM7r4foVPpS03TkjcuglztfngYihRQnIjWUPxSGj/+oIki8JEz gzfg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1709260164; x=1709864964; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Sb2DGHjJyDbpFDS1zLN6i0Hdzzb38omi0MKX/F3Yb7c=; b=ufix3o48bl+jeEGoLTtkYUsYbVgk1y4OyzmCgLJAt/9VGmjRl2pAi2KXg2zZHPUwyW uN+emdq+2vFel02fKzEKWveCRH/L9eErClZwbxwHw1bQYVKAZs5sYVfFzNRu60VL4Tf3 svPt09BJOw9xG3fLaDJkBOt1uYzHX1e+h3ixkDUPpYq7Jk0AU0SBCUbA62rPRXMg2rCv x/9fX5NmS2jdafj8hagg33b1TWmIjYkMwhmkn0DrEiRlkRvsyvpMa/qAg1EM70F8Mhe4 jTuF4JkGJAfCiwg1D7cmxa8oDWcDjAWAvnUFxysm17B/mJX7fpUmIocQeX1knkbouV3s oJjQ== X-Forwarded-Encrypted: i=1; AJvYcCUq7FenFjkbD++ymxsj8aXwK8MdUlRsTwebg36u6nyAOeZm7PQ58xe7OeprFTvcuR1i4KdubwMF/omsX19www/uyVTJmjo= X-Gm-Message-State: AOJu0YyZjHha2wAoNhPbJ1Io6PLEQBmPswQgq/FlO1XF1ARKunuakNNU CsPNjHMYec7ImOrF4i0cmrgjepv6XDk0ZhK8VzC07t/q4RUJXj9ti57bmIpAbbA= X-Google-Smtp-Source: AGHT+IHjDk2ySFQWdSO4XNU640EXZDOODKvRT6DYKhdMYBL/hdycJZSHH8FZztp5+lSx0bN2x/474A== X-Received: by 2002:a0c:9a81:0:b0:690:4917:6242 with SMTP id y1-20020a0c9a81000000b0069049176242mr484389qvd.7.1709260164345; Thu, 29 Feb 2024 18:29:24 -0800 (PST) From: Hao Xiang To: pbonzini@redhat.com, berrange@redhat.com, eduardo@habkost.net, peterx@redhat.com, farosas@suse.de, eblake@redhat.com, armbru@redhat.com, thuth@redhat.com, lvivier@redhat.com, jdenemar@redhat.com, marcel.apfelbaum@gmail.com, philmd@linaro.org, wangyanan55@huawei.com, qemu-devel@nongnu.org Cc: Hao Xiang Subject: [PATCH v4 1/7] migration/multifd: Add new migration option zero-page-detection. Date: Fri, 1 Mar 2024 02:28:23 +0000 Message-Id: <20240301022829.3390548-2-hao.xiang@bytedance.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20240301022829.3390548-1-hao.xiang@bytedance.com> References: <20240301022829.3390548-1-hao.xiang@bytedance.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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; Received-SPF: pass client-ip=2607:f8b0:4864:20::f2f; envelope-from=hao.xiang@bytedance.com; helo=mail-qv1-xf2f.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @bytedance.com) X-ZM-MESSAGEID: 1709260296117100001 Content-Type: text/plain; charset="utf-8" This new parameter controls where the zero page checking is running. 1. If this parameter is set to 'legacy', zero page checking is done in the migration main thread. 2. If this parameter is set to 'none', zero page checking is disabled. Signed-off-by: Hao Xiang Acked-by: Markus Armbruster Reviewed-by: Peter Xu --- hw/core/qdev-properties-system.c | 10 +++++++++ include/hw/qdev-properties-system.h | 4 ++++ migration/migration-hmp-cmds.c | 9 ++++++++ migration/options.c | 21 ++++++++++++++++++ migration/options.h | 1 + migration/ram.c | 4 ++++ qapi/migration.json | 33 ++++++++++++++++++++++++++--- 7 files changed, 79 insertions(+), 3 deletions(-) diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-sys= tem.c index 1a396521d5..228e685f52 100644 --- a/hw/core/qdev-properties-system.c +++ b/hw/core/qdev-properties-system.c @@ -679,6 +679,16 @@ const PropertyInfo qdev_prop_mig_mode =3D { .set_default_value =3D qdev_propinfo_set_default_value_enum, }; =20 +const PropertyInfo qdev_prop_zero_page_detection =3D { + .name =3D "ZeroPageDetection", + .description =3D "zero_page_detection values, " + "none,legacy", + .enum_table =3D &ZeroPageDetection_lookup, + .get =3D qdev_propinfo_get_enum, + .set =3D qdev_propinfo_set_enum, + .set_default_value =3D qdev_propinfo_set_default_value_enum, +}; + /* --- Reserved Region --- */ =20 /* diff --git a/include/hw/qdev-properties-system.h b/include/hw/qdev-properti= es-system.h index 06c359c190..839b170235 100644 --- a/include/hw/qdev-properties-system.h +++ b/include/hw/qdev-properties-system.h @@ -8,6 +8,7 @@ extern const PropertyInfo qdev_prop_macaddr; extern const PropertyInfo qdev_prop_reserved_region; extern const PropertyInfo qdev_prop_multifd_compression; extern const PropertyInfo qdev_prop_mig_mode; +extern const PropertyInfo qdev_prop_zero_page_detection; extern const PropertyInfo qdev_prop_losttickpolicy; extern const PropertyInfo qdev_prop_blockdev_on_error; extern const PropertyInfo qdev_prop_bios_chs_trans; @@ -47,6 +48,9 @@ extern const PropertyInfo qdev_prop_iothread_vq_mapping_l= ist; #define DEFINE_PROP_MIG_MODE(_n, _s, _f, _d) \ DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_mig_mode, \ MigMode) +#define DEFINE_PROP_ZERO_PAGE_DETECTION(_n, _s, _f, _d) \ + DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_zero_page_detection, \ + ZeroPageDetection) #define DEFINE_PROP_LOSTTICKPOLICY(_n, _s, _f, _d) \ DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_losttickpolicy, \ LostTickPolicy) diff --git a/migration/migration-hmp-cmds.c b/migration/migration-hmp-cmds.c index 99b49df5dd..7e96ae6ffd 100644 --- a/migration/migration-hmp-cmds.c +++ b/migration/migration-hmp-cmds.c @@ -344,6 +344,11 @@ void hmp_info_migrate_parameters(Monitor *mon, const Q= Dict *qdict) monitor_printf(mon, "%s: %s\n", MigrationParameter_str(MIGRATION_PARAMETER_MULTIFD_COMPRESSION= ), MultiFDCompression_str(params->multifd_compression)); + assert(params->has_zero_page_detection); + monitor_printf(mon, "%s: %s\n", + MigrationParameter_str(MIGRATION_PARAMETER_ZERO_PAGE_DETECTION= ), + qapi_enum_lookup(&ZeroPageDetection_lookup, + params->zero_page_detection)); monitor_printf(mon, "%s: %" PRIu64 " bytes\n", MigrationParameter_str(MIGRATION_PARAMETER_XBZRLE_CACHE_SIZE), params->xbzrle_cache_size); @@ -634,6 +639,10 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDi= ct *qdict) p->has_multifd_zstd_level =3D true; visit_type_uint8(v, param, &p->multifd_zstd_level, &err); break; + case MIGRATION_PARAMETER_ZERO_PAGE_DETECTION: + p->has_zero_page_detection =3D true; + visit_type_ZeroPageDetection(v, param, &p->zero_page_detection, &e= rr); + break; case MIGRATION_PARAMETER_XBZRLE_CACHE_SIZE: p->has_xbzrle_cache_size =3D true; if (!visit_type_size(v, param, &cache_size, &err)) { diff --git a/migration/options.c b/migration/options.c index 3e3e0b93b4..3c603391b0 100644 --- a/migration/options.c +++ b/migration/options.c @@ -179,6 +179,9 @@ Property migration_properties[] =3D { DEFINE_PROP_MIG_MODE("mode", MigrationState, parameters.mode, MIG_MODE_NORMAL), + DEFINE_PROP_ZERO_PAGE_DETECTION("zero-page-detection", MigrationState, + parameters.zero_page_detection, + ZERO_PAGE_DETECTION_LEGACY), =20 /* Migration capabilities */ DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE), @@ -903,6 +906,13 @@ uint64_t migrate_xbzrle_cache_size(void) return s->parameters.xbzrle_cache_size; } =20 +ZeroPageDetection migrate_zero_page_detection(void) +{ + MigrationState *s =3D migrate_get_current(); + + return s->parameters.zero_page_detection; +} + /* parameter setters */ =20 void migrate_set_block_incremental(bool value) @@ -1013,6 +1023,8 @@ MigrationParameters *qmp_query_migrate_parameters(Err= or **errp) params->vcpu_dirty_limit =3D s->parameters.vcpu_dirty_limit; params->has_mode =3D true; params->mode =3D s->parameters.mode; + params->has_zero_page_detection =3D true; + params->zero_page_detection =3D s->parameters.zero_page_detection; =20 return params; } @@ -1049,6 +1061,7 @@ void migrate_params_init(MigrationParameters *params) params->has_x_vcpu_dirty_limit_period =3D true; params->has_vcpu_dirty_limit =3D true; params->has_mode =3D true; + params->has_zero_page_detection =3D true; } =20 /* @@ -1350,6 +1363,10 @@ static void migrate_params_test_apply(MigrateSetPara= meters *params, if (params->has_mode) { dest->mode =3D params->mode; } + + if (params->has_zero_page_detection) { + dest->zero_page_detection =3D params->zero_page_detection; + } } =20 static void migrate_params_apply(MigrateSetParameters *params, Error **err= p) @@ -1494,6 +1511,10 @@ static void migrate_params_apply(MigrateSetParameter= s *params, Error **errp) if (params->has_mode) { s->parameters.mode =3D params->mode; } + + if (params->has_zero_page_detection) { + s->parameters.zero_page_detection =3D params->zero_page_detection; + } } =20 void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) diff --git a/migration/options.h b/migration/options.h index 246c160aee..b7c4fb3861 100644 --- a/migration/options.h +++ b/migration/options.h @@ -93,6 +93,7 @@ const char *migrate_tls_authz(void); const char *migrate_tls_creds(void); const char *migrate_tls_hostname(void); uint64_t migrate_xbzrle_cache_size(void); +ZeroPageDetection migrate_zero_page_detection(void); =20 /* parameters setters */ =20 diff --git a/migration/ram.c b/migration/ram.c index 45a00b45ed..2581ee1e04 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -1122,6 +1122,10 @@ static int save_zero_page(RAMState *rs, PageSearchSt= atus *pss, QEMUFile *file =3D pss->pss_channel; int len =3D 0; =20 + if (migrate_zero_page_detection() =3D=3D ZERO_PAGE_DETECTION_NONE) { + return 0; + } + if (!buffer_is_zero(p, TARGET_PAGE_SIZE)) { return 0; } diff --git a/qapi/migration.json b/qapi/migration.json index 0b33a71ab4..8da05dba47 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -664,6 +664,18 @@ { 'enum': 'MigMode', 'data': [ 'normal', 'cpr-reboot' ] } =20 +## +# @ZeroPageDetection: +# +# @none: Do not perform zero page checking. +# +# @legacy: Perform zero page checking in main migration thread. +# +# Since: 9.0 +## +{ 'enum': 'ZeroPageDetection', + 'data': [ 'none', 'legacy' ] } + ## # @BitmapMigrationBitmapAliasTransform: # @@ -885,6 +897,10 @@ # @mode: Migration mode. See description in @MigMode. Default is 'normal'. # (Since 8.2) # +# @zero-page-detection: Whether and how to detect zero pages. +# See description in @ZeroPageDetection. Default is 'legacy'. +# (since 9.0) +# # Features: # # @deprecated: Member @block-incremental is deprecated. Use @@ -918,7 +934,8 @@ 'block-bitmap-mapping', { 'name': 'x-vcpu-dirty-limit-period', 'features': ['unstable']= }, 'vcpu-dirty-limit', - 'mode'] } + 'mode', + 'zero-page-detection'] } =20 ## # @MigrateSetParameters: @@ -1077,6 +1094,10 @@ # @mode: Migration mode. See description in @MigMode. Default is 'normal'. # (Since 8.2) # +# @zero-page-detection: Whether and how to detect zero pages. +# See description in @ZeroPageDetection. Default is 'legacy'. +# (since 9.0) +# # Features: # # @deprecated: Member @block-incremental is deprecated. Use @@ -1130,7 +1151,8 @@ '*x-vcpu-dirty-limit-period': { 'type': 'uint64', 'features': [ 'unstable' ] }, '*vcpu-dirty-limit': 'uint64', - '*mode': 'MigMode'} } + '*mode': 'MigMode', + '*zero-page-detection': 'ZeroPageDetection'} } =20 ## # @migrate-set-parameters: @@ -1305,6 +1327,10 @@ # @mode: Migration mode. See description in @MigMode. Default is 'normal'. # (Since 8.2) # +# @zero-page-detection: Whether and how to detect zero pages. +# See description in @ZeroPageDetection. Default is 'legacy'. +# (since 9.0) +# # Features: # # @deprecated: Member @block-incremental is deprecated. Use @@ -1355,7 +1381,8 @@ '*x-vcpu-dirty-limit-period': { 'type': 'uint64', 'features': [ 'unstable' ] }, '*vcpu-dirty-limit': 'uint64', - '*mode': 'MigMode'} } + '*mode': 'MigMode', + '*zero-page-detection': 'ZeroPageDetection'} } =20 ## # @query-migrate-parameters: --=20 2.30.2