From 34c55a94b14323c06791395801aadaf5606761dc Mon Sep 17 00:00:00 2001 From: Juan Quintela Date: Tue, 10 Apr 2018 23:35:15 +0200 Subject: [PATCH] migration: Create multipage support We only create/destry the page list here. We will use it later. Signed-off-by: Juan Quintela Reviewed-by: Dr. David Alan Gilbert --- migration/ram.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) diff --git a/migration/ram.c b/migration/ram.c index cd5f55117d..ed4401ee46 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -517,6 +517,20 @@ typedef struct { uint8_t id; } __attribute__((packed)) MultiFDInit_t; +typedef struct { + /* number of used pages */ + uint32_t used; + /* number of allocated pages */ + uint32_t allocated; + /* global number of generated multifd packets */ + uint64_t packet_num; + /* offset of each page */ + ram_addr_t *offset; + /* pointer to each page */ + struct iovec *iov; + RAMBlock *block; +} MultiFDPages_t; + typedef struct { /* this fields are not changed once the thread is created */ /* channel number */ @@ -535,6 +549,8 @@ typedef struct { bool running; /* should this thread finish */ bool quit; + /* array of pages to sent */ + MultiFDPages_t *pages; } MultiFDSendParams; typedef struct { @@ -555,6 +571,8 @@ typedef struct { bool running; /* should this thread finish */ bool quit; + /* array of pages to receive */ + MultiFDPages_t *pages; } MultiFDRecvParams; static int multifd_send_initial_packet(MultiFDSendParams *p, Error **errp) @@ -619,10 +637,36 @@ static int multifd_recv_initial_packet(QIOChannel *c, Error **errp) return msg.id; } +static MultiFDPages_t *multifd_pages_init(size_t size) +{ + MultiFDPages_t *pages = g_new0(MultiFDPages_t, 1); + + pages->allocated = size; + pages->iov = g_new0(struct iovec, size); + pages->offset = g_new0(ram_addr_t, size); + + return pages; +} + +static void multifd_pages_clear(MultiFDPages_t *pages) +{ + pages->used = 0; + pages->allocated = 0; + pages->packet_num = 0; + pages->block = NULL; + g_free(pages->iov); + pages->iov = NULL; + g_free(pages->offset); + pages->offset = NULL; + g_free(pages); +} + struct { MultiFDSendParams *params; /* number of created threads */ int count; + /* array of pages to sent */ + MultiFDPages_t *pages; } *multifd_send_state; static void multifd_send_terminate_threads(Error *err) @@ -672,9 +716,13 @@ int multifd_save_cleanup(Error **errp) qemu_sem_destroy(&p->sem); g_free(p->name); p->name = NULL; + multifd_pages_clear(p->pages); + p->pages = NULL; } g_free(multifd_send_state->params); multifd_send_state->params = NULL; + multifd_pages_clear(multifd_send_state->pages); + multifd_send_state->pages = NULL; g_free(multifd_send_state); multifd_send_state = NULL; return ret; @@ -735,6 +783,7 @@ static void multifd_new_send_channel_async(QIOTask *task, gpointer opaque) int multifd_save_setup(void) { int thread_count; + uint32_t page_count = migrate_multifd_page_count(); uint8_t i; if (!migrate_use_multifd()) { @@ -744,6 +793,8 @@ int multifd_save_setup(void) multifd_send_state = g_malloc0(sizeof(*multifd_send_state)); multifd_send_state->params = g_new0(MultiFDSendParams, thread_count); atomic_set(&multifd_send_state->count, 0); + multifd_send_state->pages = multifd_pages_init(page_count); + for (i = 0; i < thread_count; i++) { MultiFDSendParams *p = &multifd_send_state->params[i]; @@ -751,6 +802,7 @@ int multifd_save_setup(void) qemu_sem_init(&p->sem, 0); p->quit = false; p->id = i; + p->pages = multifd_pages_init(page_count); p->name = g_strdup_printf("multifdsend_%d", i); socket_send_channel_create(multifd_new_send_channel_async, p); } @@ -808,6 +860,8 @@ int multifd_load_cleanup(Error **errp) qemu_sem_destroy(&p->sem); g_free(p->name); p->name = NULL; + multifd_pages_clear(p->pages); + p->pages = NULL; } g_free(multifd_recv_state->params); multifd_recv_state->params = NULL; @@ -841,6 +895,7 @@ static void *multifd_recv_thread(void *opaque) int multifd_load_setup(void) { int thread_count; + uint32_t page_count = migrate_multifd_page_count(); uint8_t i; if (!migrate_use_multifd()) { @@ -850,6 +905,7 @@ int multifd_load_setup(void) multifd_recv_state = g_malloc0(sizeof(*multifd_recv_state)); multifd_recv_state->params = g_new0(MultiFDRecvParams, thread_count); atomic_set(&multifd_recv_state->count, 0); + for (i = 0; i < thread_count; i++) { MultiFDRecvParams *p = &multifd_recv_state->params[i]; @@ -857,6 +913,7 @@ int multifd_load_setup(void) qemu_sem_init(&p->sem, 0); p->quit = false; p->id = i; + p->pages = multifd_pages_init(page_count); p->name = g_strdup_printf("multifdrecv_%d", i); } return 0;