diff options
| -rw-r--r-- | docs/devel/kconfig.rst | 2 | ||||
| -rw-r--r-- | hw/scsi/virtio-scsi.c | 7 | ||||
| -rw-r--r-- | migration/ram.c | 66 | ||||
| -rw-r--r-- | target/i386/kvm.c | 10 |
4 files changed, 68 insertions, 17 deletions
diff --git a/docs/devel/kconfig.rst b/docs/devel/kconfig.rst index d6f8eb0977..b7bca44704 100644 --- a/docs/devel/kconfig.rst +++ b/docs/devel/kconfig.rst @@ -267,7 +267,7 @@ the default configuration by uncommenting lines in the first group, or commenting out lines in the second group. It is also possible to run QEMU's configure script with the -``--with-default-devices`` option. When this is done, everything defaults +``--without-default-devices`` option. When this is done, everything defaults to ``n`` unless it is ``select``ed or explicitly switched on in the ``.mak`` files. In other words, ``default`` and ``imply`` directives are disabled. When QEMU is built with this option, the user will probably diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c index d0bdbff090..8b9e5e2b49 100644 --- a/hw/scsi/virtio-scsi.c +++ b/hw/scsi/virtio-scsi.c @@ -832,6 +832,7 @@ static void virtio_scsi_hotunplug(HotplugHandler *hotplug_dev, DeviceState *dev, VirtIODevice *vdev = VIRTIO_DEVICE(hotplug_dev); VirtIOSCSI *s = VIRTIO_SCSI(vdev); SCSIDevice *sd = SCSI_DEVICE(dev); + AioContext *ctx = s->ctx ?: qemu_get_aio_context(); if (virtio_vdev_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) { virtio_scsi_acquire(s); @@ -841,14 +842,16 @@ static void virtio_scsi_hotunplug(HotplugHandler *hotplug_dev, DeviceState *dev, virtio_scsi_release(s); } + aio_disable_external(ctx); + qdev_simple_device_unplug_cb(hotplug_dev, dev, errp); + aio_enable_external(ctx); + if (s->ctx) { virtio_scsi_acquire(s); /* If other users keep the BlockBackend in the iothread, that's ok */ blk_set_aio_context(sd->conf.blk, qemu_get_aio_context(), NULL); virtio_scsi_release(s); } - - qdev_simple_device_unplug_cb(hotplug_dev, dev, errp); } static struct SCSIBusInfo virtio_scsi_scsi_info = { diff --git a/migration/ram.c b/migration/ram.c index 2b0774c2bf..889148dd84 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -677,6 +677,8 @@ typedef struct { QemuMutex mutex; /* is this channel thread running */ bool running; + /* should this thread finish */ + bool quit; /* array of pages to receive */ MultiFDPages_t *pages; /* packet allocated len */ @@ -920,7 +922,7 @@ struct { * false. */ -static void multifd_send_pages(void) +static int multifd_send_pages(void) { int i; static int next_channel; @@ -933,6 +935,11 @@ static void multifd_send_pages(void) p = &multifd_send_state->params[i]; qemu_mutex_lock(&p->mutex); + if (p->quit) { + error_report("%s: channel %d has already quit!", __func__, i); + qemu_mutex_unlock(&p->mutex); + return -1; + } if (!p->pending_job) { p->pending_job++; next_channel = (i + 1) % migrate_multifd_channels(); @@ -951,9 +958,11 @@ static void multifd_send_pages(void) ram_counters.transferred += transferred;; qemu_mutex_unlock(&p->mutex); qemu_sem_post(&p->sem); + + return 1; } -static void multifd_queue_page(RAMBlock *block, ram_addr_t offset) +static int multifd_queue_page(RAMBlock *block, ram_addr_t offset) { MultiFDPages_t *pages = multifd_send_state->pages; @@ -968,15 +977,19 @@ static void multifd_queue_page(RAMBlock *block, ram_addr_t offset) pages->used++; if (pages->used < pages->allocated) { - return; + return 1; } } - multifd_send_pages(); + if (multifd_send_pages() < 0) { + return -1; + } if (pages->block != block) { - multifd_queue_page(block, offset); + return multifd_queue_page(block, offset); } + + return 1; } static void multifd_send_terminate_threads(Error *err) @@ -1049,7 +1062,10 @@ static void multifd_send_sync_main(void) return; } if (multifd_send_state->pages->used) { - multifd_send_pages(); + if (multifd_send_pages() < 0) { + error_report("%s: multifd_send_pages fail", __func__); + return; + } } for (i = 0; i < migrate_multifd_channels(); i++) { MultiFDSendParams *p = &multifd_send_state->params[i]; @@ -1058,6 +1074,12 @@ static void multifd_send_sync_main(void) qemu_mutex_lock(&p->mutex); + if (p->quit) { + error_report("%s: channel %d has already quit", __func__, i); + qemu_mutex_unlock(&p->mutex); + return; + } + p->packet_num = multifd_send_state->packet_num++; p->flags |= MULTIFD_FLAG_SYNC; p->pending_job++; @@ -1077,7 +1099,8 @@ static void *multifd_send_thread(void *opaque) { MultiFDSendParams *p = opaque; Error *local_err = NULL; - int ret; + int ret = 0; + uint32_t flags = 0; trace_multifd_send_thread_start(p->id); rcu_register_thread(); @@ -1095,7 +1118,7 @@ static void *multifd_send_thread(void *opaque) if (p->pending_job) { uint32_t used = p->pages->used; uint64_t packet_num = p->packet_num; - uint32_t flags = p->flags; + flags = p->flags; p->next_packet_size = used * qemu_target_page_size(); multifd_send_fill_packet(p); @@ -1144,6 +1167,17 @@ out: multifd_send_terminate_threads(local_err); } + /* + * Error happen, I will exit, but I can't just leave, tell + * who pay attention to me. + */ + if (ret != 0) { + if (flags & MULTIFD_FLAG_SYNC) { + qemu_sem_post(&multifd_send_state->sem_sync); + } + qemu_sem_post(&multifd_send_state->channels_ready); + } + qemu_mutex_lock(&p->mutex); p->running = false; qemu_mutex_unlock(&p->mutex); @@ -1234,6 +1268,7 @@ static void multifd_recv_terminate_threads(Error *err) MultiFDRecvParams *p = &multifd_recv_state->params[i]; qemu_mutex_lock(&p->mutex); + p->quit = true; /* We could arrive here for two reasons: - normal quit, i.e. everything went fine, just finished - error quit: We close the channels so the channel threads @@ -1256,6 +1291,12 @@ int multifd_load_cleanup(Error **errp) MultiFDRecvParams *p = &multifd_recv_state->params[i]; if (p->running) { + p->quit = true; + /* + * multifd_recv_thread may hung at MULTIFD_FLAG_SYNC handle code, + * however try to wakeup it without harm in cleanup phase. + */ + qemu_sem_post(&p->sem_sync); qemu_thread_join(&p->thread); } object_unref(OBJECT(p->c)); @@ -1319,6 +1360,10 @@ static void *multifd_recv_thread(void *opaque) uint32_t used; uint32_t flags; + if (p->quit) { + break; + } + ret = qio_channel_read_all_eof(p->c, (void *)p->packet, p->packet_len, &local_err); if (ret == 0) { /* EOF */ @@ -1390,6 +1435,7 @@ int multifd_load_setup(void) qemu_mutex_init(&p->mutex); qemu_sem_init(&p->sem_sync, 0); + p->quit = false; p->id = i; p->pages = multifd_pages_init(page_count); p->packet_len = sizeof(MultiFDPacket_t) @@ -2033,7 +2079,9 @@ static int ram_save_page(RAMState *rs, PageSearchStatus *pss, bool last_stage) static int ram_save_multifd_page(RAMState *rs, RAMBlock *block, ram_addr_t offset) { - multifd_queue_page(block, offset); + if (multifd_queue_page(block, offset) < 0) { + return -1; + } ram_counters.normal++; return 1; diff --git a/target/i386/kvm.c b/target/i386/kvm.c index ada89d27cc..dbbb13772a 100644 --- a/target/i386/kvm.c +++ b/target/i386/kvm.c @@ -3563,12 +3563,12 @@ int kvm_arch_put_registers(CPUState *cpu, int level) assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu)); - ret = kvm_put_nested_state(x86_cpu); - if (ret < 0) { - return ret; - } - if (level >= KVM_PUT_RESET_STATE) { + ret = kvm_put_nested_state(x86_cpu); + if (ret < 0) { + return ret; + } + ret = kvm_put_msr_feature_control(x86_cpu); if (ret < 0) { return ret; |