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Thu, 23 Dec 2021 22:50:26 -0800 (PST) X-Google-Smtp-Source: ABdhPJyhd2m1GxQJCGyY2VEDWMw5iI8DrgmLVOzVE7lOZjJHQw1q2EIghGpEgRl9hqzABlBAo1CaHA== X-Received: by 2002:a5d:6d85:: with SMTP id l5mr3748332wrs.579.1640328625758; Thu, 23 Dec 2021 22:50:25 -0800 (PST) From: Peter Xu To: qemu-devel@nongnu.org Subject: [PATCH v3 5/8] migration: Drop return code for disgard ram process Date: Fri, 24 Dec 2021 14:49:57 +0800 Message-Id: <20211224065000.97572-6-peterx@redhat.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211224065000.97572-1-peterx@redhat.com> References: <20211224065000.97572-1-peterx@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=peterx@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com 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=170.10.129.124; envelope-from=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.203, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Edmondson , "Dr . David Alan Gilbert" , Leonardo Bras Soares Passos , peterx@redhat.com, Juan Quintela Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1640329624871100001 Content-Type: text/plain; charset="utf-8" It will just never fail. Drop those return values where they're constantly zeros. A tiny touch-up on the tracepoint so trace_ram_postcopy_send_discard_bitmap= () is called after the logic itself (which sounds more reasonable). Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Peter Xu Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- migration/migration.c | 5 +---- migration/ram.c | 20 +++++--------------- migration/ram.h | 2 +- 3 files changed, 7 insertions(+), 20 deletions(-) diff --git a/migration/migration.c b/migration/migration.c index 0652165610..252ce1eaec 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -2991,10 +2991,7 @@ static int postcopy_start(MigrationState *ms) * that are dirty */ if (migrate_postcopy_ram()) { - if (ram_postcopy_send_discard_bitmap(ms)) { - error_report("postcopy send discard bitmap failed"); - goto fail; - } + ram_postcopy_send_discard_bitmap(ms); } =20 /* diff --git a/migration/ram.c b/migration/ram.c index e7107b9790..5234d1ece1 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -2473,8 +2473,6 @@ static void postcopy_chunk_hostpages_pass(MigrationSt= ate *ms, RAMBlock *block); /** * postcopy_each_ram_send_discard: discard all RAMBlocks * - * Returns 0 for success or negative for error - * * Utility for the outgoing postcopy code. * Calls postcopy_send_discard_bm_ram for each RAMBlock * passing it bitmap indexes and name. @@ -2483,10 +2481,9 @@ static void postcopy_chunk_hostpages_pass(MigrationS= tate *ms, RAMBlock *block); * * @ms: current migration state */ -static int postcopy_each_ram_send_discard(MigrationState *ms) +static void postcopy_each_ram_send_discard(MigrationState *ms) { struct RAMBlock *block; - int ret; =20 RAMBLOCK_FOREACH_NOT_IGNORED(block) { postcopy_discard_send_init(ms, block->idstr); @@ -2504,14 +2501,9 @@ static int postcopy_each_ram_send_discard(MigrationS= tate *ms) * just needs indexes at this point, avoids it having * target page specific code. */ - ret =3D postcopy_send_discard_bm_ram(ms, block); + postcopy_send_discard_bm_ram(ms, block); postcopy_discard_send_finish(ms); - if (ret) { - return ret; - } } - - return 0; } =20 /** @@ -2584,8 +2576,6 @@ static void postcopy_chunk_hostpages_pass(MigrationSt= ate *ms, RAMBlock *block) /** * ram_postcopy_send_discard_bitmap: transmit the discard bitmap * - * Returns zero on success - * * Transmit the set of pages to be discarded after precopy to the target * these are pages that: * a) Have been previously transmitted but are now dirty again @@ -2596,7 +2586,7 @@ static void postcopy_chunk_hostpages_pass(MigrationSt= ate *ms, RAMBlock *block) * * @ms: current migration state */ -int ram_postcopy_send_discard_bitmap(MigrationState *ms) +void ram_postcopy_send_discard_bitmap(MigrationState *ms) { RAMState *rs =3D ram_state; =20 @@ -2610,9 +2600,9 @@ int ram_postcopy_send_discard_bitmap(MigrationState *= ms) rs->last_sent_block =3D NULL; rs->last_page =3D 0; =20 - trace_ram_postcopy_send_discard_bitmap(); + postcopy_each_ram_send_discard(ms); =20 - return postcopy_each_ram_send_discard(ms); + trace_ram_postcopy_send_discard_bitmap(); } =20 /** diff --git a/migration/ram.h b/migration/ram.h index f543e25765..2c6dc3675d 100644 --- a/migration/ram.h +++ b/migration/ram.h @@ -57,7 +57,7 @@ int ram_save_queue_pages(const char *rbname, ram_addr_t s= tart, ram_addr_t len); void acct_update_position(QEMUFile *f, size_t size, bool zero); void ram_postcopy_migrated_memory_release(MigrationState *ms); /* For outgoing discard bitmap */ -int ram_postcopy_send_discard_bitmap(MigrationState *ms); +void ram_postcopy_send_discard_bitmap(MigrationState *ms); /* For incoming postcopy discard */ int ram_discard_range(const char *block_name, uint64_t start, size_t lengt= h); int ram_postcopy_incoming_init(MigrationIncomingState *mis); --=20 2.32.0