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bh=wmVOlgbKMIZPUpnLNg5089YHM4K2bPynpzFMwVEBTrI=; b=J8hLITL2VWZ/V0GzGW8GdZOXA+iS/L3lXzMiPVysK5ziqNIKxY0rej7OzRN/FbvfwSrT8X FRGEyVVSehM8Ts9te9m2VUEcihSvNHjDeLTWVJQ6LpmFbF6zHhuUA1vIegr0FSgejbeAct D21WiVa+iWiuf9jPo1g03bRl2ZtI+Yg= X-MC-Unique: qEEz9NggN86I5Niux8CcdQ-1 From: peterx@redhat.com To: Peter Maydell , qemu-devel@nongnu.org Cc: peterx@redhat.com, Fabiano Rosas Subject: [PULL 16/34] migration/multifd: Split multifd_send_terminate_threads() Date: Thu, 8 Feb 2024 11:05:10 +0800 Message-ID: <20240208030528.368214-17-peterx@redhat.com> In-Reply-To: <20240208030528.368214-1-peterx@redhat.com> References: <20240208030528.368214-1-peterx@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.9 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=170.10.133.124; envelope-from=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.106, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, 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 @redhat.com) X-ZM-MESSAGEID: 1707361880568100003 Content-Type: text/plain; charset="utf-8" From: Peter Xu Split multifd_send_terminate_threads() into two functions: - multifd_send_set_error(): used when an error happened on the sender side, set error and quit state only - multifd_send_terminate_threads(): used only by the main thread to kick all multifd send threads out of sleep, for the last recycling. Use multifd_send_set_error() in the three old call sites where only the error will be set. Use multifd_send_terminate_threads() in the last one where the main thread will kick the multifd threads at last in multifd_save_cleanup(). Both helpers will need to set quitting=3D1. Suggested-by: Fabiano Rosas Reviewed-by: Fabiano Rosas Link: https://lore.kernel.org/r/20240202102857.110210-16-peterx@redhat.com Signed-off-by: Peter Xu --- migration/multifd.c | 27 ++++++++++++++++++--------- migration/trace-events | 2 +- 2 files changed, 19 insertions(+), 10 deletions(-) diff --git a/migration/multifd.c b/migration/multifd.c index 28b54100cd..ba86f9dda5 100644 --- a/migration/multifd.c +++ b/migration/multifd.c @@ -536,10 +536,9 @@ int multifd_queue_page(RAMBlock *block, ram_addr_t off= set) return 1; } =20 -static void multifd_send_terminate_threads(Error *err) +/* Multifd send side hit an error; remember it and prepare to quit */ +static void multifd_send_set_error(Error *err) { - int i; - /* * We don't want to exit each threads twice. Depending on where * we get the error, or if there are two independent errors in two @@ -550,8 +549,6 @@ static void multifd_send_terminate_threads(Error *err) return; } =20 - trace_multifd_send_terminate_threads(err !=3D NULL); - if (err) { MigrationState *s =3D migrate_get_current(); migrate_set_error(s, err); @@ -563,7 +560,19 @@ static void multifd_send_terminate_threads(Error *err) MIGRATION_STATUS_FAILED); } } +} + +static void multifd_send_terminate_threads(void) +{ + int i; + + trace_multifd_send_terminate_threads(); =20 + /* + * Tell everyone we're quitting. No xchg() needed here; we simply + * always set it. + */ + qatomic_set(&multifd_send_state->exiting, 1); for (i =3D 0; i < migrate_multifd_channels(); i++) { MultiFDSendParams *p =3D &multifd_send_state->params[i]; =20 @@ -586,7 +595,7 @@ void multifd_save_cleanup(void) if (!migrate_multifd()) { return; } - multifd_send_terminate_threads(NULL); + multifd_send_terminate_threads(); for (i =3D 0; i < migrate_multifd_channels(); i++) { MultiFDSendParams *p =3D &multifd_send_state->params[i]; =20 @@ -780,7 +789,7 @@ out: if (ret) { assert(local_err); trace_multifd_send_error(p->id); - multifd_send_terminate_threads(local_err); + multifd_send_set_error(local_err); multifd_send_kick_main(p); error_free(local_err); } @@ -816,7 +825,7 @@ static void multifd_tls_outgoing_handshake(QIOTask *tas= k, =20 trace_multifd_tls_outgoing_handshake_error(ioc, error_get_pretty(err)); =20 - multifd_send_terminate_threads(err); + multifd_send_set_error(err); multifd_send_kick_main(p); error_free(err); } @@ -898,7 +907,7 @@ static void multifd_new_send_channel_async(QIOTask *tas= k, gpointer opaque) } =20 trace_multifd_new_send_channel_async_error(p->id, local_err); - multifd_send_terminate_threads(local_err); + multifd_send_set_error(local_err); multifd_send_kick_main(p); object_unref(OBJECT(ioc)); error_free(local_err); diff --git a/migration/trace-events b/migration/trace-events index de4a743c8a..298ad2b0dd 100644 --- a/migration/trace-events +++ b/migration/trace-events @@ -141,7 +141,7 @@ multifd_send_error(uint8_t id) "channel %u" multifd_send_sync_main(long packet_num) "packet num %ld" multifd_send_sync_main_signal(uint8_t id) "channel %u" multifd_send_sync_main_wait(uint8_t id) "channel %u" -multifd_send_terminate_threads(bool error) "error %d" +multifd_send_terminate_threads(void) "" multifd_send_thread_end(uint8_t id, uint64_t packets, uint64_t normal_page= s) "channel %u packets %" PRIu64 " normal pages %" PRIu64 multifd_send_thread_start(uint8_t id) "%u" multifd_tls_outgoing_handshake_start(void *ioc, void *tioc, const char *ho= stname) "ioc=3D%p tioc=3D%p hostname=3D%s" --=20 2.43.0