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| author | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2017-02-24 18:28:34 +0000 |
|---|---|---|
| committer | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2017-02-28 11:30:23 +0000 |
| commit | 67f11b5c23fca79845c04ace6af0b686c82e0f22 (patch) | |
| tree | dc8694c3e1a985717e82f9e6abb66f35767b5b70 | |
| parent | e2fa71f527510387f9d474414eba7f9812c58347 (diff) | |
| download | focaccia-qemu-67f11b5c23fca79845c04ace6af0b686c82e0f22.tar.gz focaccia-qemu-67f11b5c23fca79845c04ace6af0b686c82e0f22.zip | |
postcopy: Record largest page size
Record the largest page size in use; we'll need it soon for allocating temporary buffers. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Laurent Vivier <lvivier@redhat.com> Message-Id: <20170224182844.32452-7-dgilbert@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
| -rw-r--r-- | exec.c | 13 | ||||
| -rw-r--r-- | include/exec/cpu-common.h | 1 | ||||
| -rw-r--r-- | include/migration/migration.h | 1 | ||||
| -rw-r--r-- | migration/migration.c | 1 |
4 files changed, 16 insertions, 0 deletions
diff --git a/exec.c b/exec.c index 24cdf64226..785d20f648 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 1350c2e441..8c305aa4fa 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 6272adfaba..08b98e9911 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -93,6 +93,7 @@ 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 481c540a6d..3dab6845b1 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -387,6 +387,7 @@ 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); |