From: "Dr. David Alan Gilbert" <dgilb...@redhat.com> Record the largest page size in use; we'll need it soon for allocating temporary buffers.
Signed-off-by: Dr. David Alan Gilbert <dgilb...@redhat.com> Reviewed-by: Juan Quintela <quint...@redhat.com> Reviewed-by: Laurent Vivier <lviv...@redhat.com> --- exec.c | 13 +++++++++++++ include/exec/cpu-common.h | 1 + include/migration/migration.h | 1 + migration/migration.c | 1 + 4 files changed, 16 insertions(+) diff --git a/exec.c b/exec.c index ec3a11f..099794a 100644 --- a/exec.c +++ b/exec.c @@ -1524,6 +1524,19 @@ size_t qemu_ram_pagesize(RAMBlock *rb) return rb->page_size; } +/* Returns the largest size of page in use */ +size_t qemu_ram_pagesize_largest(void) +{ + RAMBlock *block; + size_t largest = 0; + + QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + largest = MAX(largest, qemu_ram_pagesize(block)); + } + + return largest; +} + static int memory_try_enable_merging(void *addr, size_t len) { if (!machine_mem_merge(current_machine)) { diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index 1350c2e..8c305aa 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -64,6 +64,7 @@ void qemu_ram_set_idstr(RAMBlock *block, const char *name, DeviceState *dev); void qemu_ram_unset_idstr(RAMBlock *block); const char *qemu_ram_get_idstr(RAMBlock *rb); size_t qemu_ram_pagesize(RAMBlock *block); +size_t qemu_ram_pagesize_largest(void); void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf, int len, int is_write); diff --git a/include/migration/migration.h b/include/migration/migration.h index aafa68f..e8e2a7f 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -92,6 +92,7 @@ struct MigrationIncomingState { */ QemuEvent main_thread_load_event; + size_t largest_page_size; bool have_fault_thread; QemuThread fault_thread; QemuSemaphore fault_thread_sem; diff --git a/migration/migration.c b/migration/migration.c index c6ae69d..869697e 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -383,6 +383,7 @@ static void process_incoming_migration_co(void *opaque) int ret; mis->from_src_file = f; + mis->largest_page_size = qemu_ram_pagesize_largest(); postcopy_state_set(POSTCOPY_INCOMING_NONE); migrate_set_state(&mis->state, MIGRATION_STATUS_NONE, MIGRATION_STATUS_ACTIVE); -- 2.9.3