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migration: Rename res_{postcopy,precopy}_only

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Once that res_compatible is removed, they don't make sense anymore.
We remove the _only preffix.  And to make things clearer we rename
them to must_precopy and can_postcopy.

Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Juan Quintela 2023-02-08 14:48:02 +01:00
parent 24f254ed79
commit 24beea4efe
9 changed files with 59 additions and 66 deletions
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7
hw/s390x/s390-stattrib.c
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@ -182,16 +182,15 @@ static int cmma_save_setup(QEMUFile *f, void *opaque)
return 0;
}
static void cmma_state_pending(void *opaque,
uint64_t *res_precopy_only,
uint64_t *res_postcopy_only)
static void cmma_state_pending(void *opaque, uint64_t *must_precopy,
uint64_t *can_postcopy)
{
S390StAttribState *sas = S390_STATTRIB(opaque);
S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
long long res = sac->get_dirtycount(sas);
if (res >= 0) {
*res_precopy_only += res;
*must_precopy += res;
}
}

10
hw/vfio/migration.c
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@ -456,9 +456,8 @@ static void vfio_save_cleanup(void *opaque)
trace_vfio_save_cleanup(vbasedev->name);
}
static void vfio_state_pending(void *opaque,
uint64_t *res_precopy_only,
uint64_t *res_postcopy_only)
static void vfio_state_pending(void *opaque, uint64_t *must_precopy,
uint64_t *can_postcopy)
{
VFIODevice *vbasedev = opaque;
VFIOMigration *migration = vbasedev->migration;
@ -469,10 +468,9 @@ static void vfio_state_pending(void *opaque,
return;
}
*res_precopy_only += migration->pending_bytes;
*must_precopy += migration->pending_bytes;
trace_vfio_state_pending(vbasedev->name, *res_precopy_only,
*res_postcopy_only);
trace_vfio_state_pending(vbasedev->name, *must_precopy, *can_postcopy);
}
static int vfio_save_iterate(QEMUFile *f, void *opaque)

27
include/migration/register.h
View File

@ -47,22 +47,25 @@ typedef struct SaveVMHandlers {
/* This runs outside the iothread lock! */
int (*save_setup)(QEMUFile *f, void *opaque);
/* Note for save_live_pending:
* - res_precopy_only is for data which must be migrated in precopy phase
* or in stopped state, in other words - before target vm start
* - res_postcopy_only is for data which must be migrated in postcopy phase
* or in stopped state, in other words - after source vm stop
* must_precopy:
* - must be migrated in precopy or in stopped state
* - i.e. must be migrated before target start
*
* Sum of res_postcopy_only and res_postcopy_only is the whole
* amount of pending data.
* can_postcopy:
* - can migrate in postcopy or in stopped state
* - i.e. can migrate after target start
* - some can also be migrated during precopy (RAM)
* - some must be migrated after source stops (block-dirty-bitmap)
*
* Sum of can_postcopy and must_postcopy is the whole amount of
* pending data.
*/
/* This estimates the remaining data to transfer */
void (*state_pending_estimate)(void *opaque,
uint64_t *res_precopy_only,
uint64_t *res_postcopy_only);
void (*state_pending_estimate)(void *opaque, uint64_t *must_precopy,
uint64_t *can_postcopy);
/* This calculate the exact remaining data to transfer */
void (*state_pending_exact)(void *opaque,
uint64_t *res_precopy_only,
uint64_t *res_postcopy_only);
void (*state_pending_exact)(void *opaque, uint64_t *must_precopy,
uint64_t *can_postcopy);
LoadStateHandler *load_state;
int (*load_setup)(QEMUFile *f, void *opaque);
int (*load_cleanup)(void *opaque);

6
migration/block-dirty-bitmap.c
View File

@ -763,8 +763,8 @@ static int dirty_bitmap_save_complete(QEMUFile *f, void *opaque)
}
static void dirty_bitmap_state_pending(void *opaque,
uint64_t *res_precopy_only,
uint64_t *res_postcopy_only)
uint64_t *must_precopy,
uint64_t *can_postcopy)
{
DBMSaveState *s = &((DBMState *)opaque)->save;
SaveBitmapState *dbms;
@ -784,7 +784,7 @@ static void dirty_bitmap_state_pending(void *opaque,
trace_dirty_bitmap_state_pending(pending);
*res_postcopy_only += pending;
*can_postcopy += pending;
}
/* First occurrence of this bitmap. It should be created if doesn't exist */

7
migration/block.c
View File

@ -853,9 +853,8 @@ static int block_save_complete(QEMUFile *f, void *opaque)
return 0;
}
static void block_state_pending(void *opaque,
uint64_t *res_precopy_only,
uint64_t *res_postcopy_only)
static void block_state_pending(void *opaque, uint64_t *must_precopy,
uint64_t *can_postcopy)
{
/* Estimate pending number of bytes to send */
uint64_t pending;
@ -876,7 +875,7 @@ static void block_state_pending(void *opaque,
trace_migration_block_state_pending(pending);
/* We don't do postcopy */
*res_precopy_only += pending;
*must_precopy += pending;
}
static int block_load(QEMUFile *f, void *opaque, int version_id)

18
migration/migration.c
View File

@ -3863,18 +3863,18 @@ typedef enum {
*/
static MigIterateState migration_iteration_run(MigrationState *s)
{
uint64_t pend_pre, pend_post;
uint64_t must_precopy, can_postcopy;
bool in_postcopy = s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE;
qemu_savevm_state_pending_estimate(&pend_pre, &pend_post);
uint64_t pending_size = pend_pre + pend_post;
qemu_savevm_state_pending_estimate(&must_precopy, &can_postcopy);
uint64_t pending_size = must_precopy + can_postcopy;
trace_migrate_pending_estimate(pending_size, pend_pre, pend_post);
trace_migrate_pending_estimate(pending_size, must_precopy, can_postcopy);
if (pend_pre <= s->threshold_size) {
qemu_savevm_state_pending_exact(&pend_pre, &pend_post);
pending_size = pend_pre + pend_post;
trace_migrate_pending_exact(pending_size, pend_pre, pend_post);
if (must_precopy <= s->threshold_size) {
qemu_savevm_state_pending_exact(&must_precopy, &can_postcopy);
pending_size = must_precopy + can_postcopy;
trace_migrate_pending_exact(pending_size, must_precopy, can_postcopy);
}
if (!pending_size || pending_size < s->threshold_size) {
@ -3884,7 +3884,7 @@ static MigIterateState migration_iteration_run(MigrationState *s)
}
/* Still a significant amount to transfer */
if (!in_postcopy && pend_pre <= s->threshold_size &&
if (!in_postcopy && must_precopy <= s->threshold_size &&
qatomic_read(&s->start_postcopy)) {
if (postcopy_start(s)) {
error_report("%s: postcopy failed to start", __func__);

18
migration/ram.c
View File

@ -3489,9 +3489,8 @@ static int ram_save_complete(QEMUFile *f, void *opaque)
return 0;
}
static void ram_state_pending_estimate(void *opaque,
uint64_t *res_precopy_only,
uint64_t *res_postcopy_only)
static void ram_state_pending_estimate(void *opaque, uint64_t *must_precopy,
uint64_t *can_postcopy)
{
RAMState **temp = opaque;
RAMState *rs = *temp;
@ -3500,15 +3499,14 @@ static void ram_state_pending_estimate(void *opaque,
if (migrate_postcopy_ram()) {
/* We can do postcopy, and all the data is postcopiable */
*res_postcopy_only += remaining_size;
*can_postcopy += remaining_size;
} else {
*res_precopy_only += remaining_size;
*must_precopy += remaining_size;
}
}
static void ram_state_pending_exact(void *opaque,
uint64_t *res_precopy_only,
uint64_t *res_postcopy_only)
static void ram_state_pending_exact(void *opaque, uint64_t *must_precopy,
uint64_t *can_postcopy)
{
RAMState **temp = opaque;
RAMState *rs = *temp;
@ -3526,9 +3524,9 @@ static void ram_state_pending_exact(void *opaque,
if (migrate_postcopy_ram()) {
/* We can do postcopy, and all the data is postcopiable */
*res_postcopy_only += remaining_size;
*can_postcopy += remaining_size;
} else {
*res_precopy_only += remaining_size;
*must_precopy += remaining_size;
}
}

24
migration/savevm.c
View File

@ -1541,13 +1541,13 @@ flush:
* the result is split into the amount for units that can and
* for units that can't do postcopy.
*/
void qemu_savevm_state_pending_estimate(uint64_t *res_precopy_only,
uint64_t *res_postcopy_only)
void qemu_savevm_state_pending_estimate(uint64_t *must_precopy,
uint64_t *can_postcopy)
{
SaveStateEntry *se;
*res_precopy_only = 0;
*res_postcopy_only = 0;
*must_precopy = 0;
*can_postcopy = 0;
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
if (!se->ops || !se->ops->state_pending_estimate) {
@ -1558,19 +1558,17 @@ void qemu_savevm_state_pending_estimate(uint64_t *res_precopy_only,
continue;
}
}
se->ops->state_pending_estimate(se->opaque,
res_precopy_only,
res_postcopy_only);
se->ops->state_pending_estimate(se->opaque, must_precopy, can_postcopy);
}
}
void qemu_savevm_state_pending_exact(uint64_t *res_precopy_only,
uint64_t *res_postcopy_only)
void qemu_savevm_state_pending_exact(uint64_t *must_precopy,
uint64_t *can_postcopy)
{
SaveStateEntry *se;
*res_precopy_only = 0;
*res_postcopy_only = 0;
*must_precopy = 0;
*can_postcopy = 0;
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
if (!se->ops || !se->ops->state_pending_exact) {
@ -1581,9 +1579,7 @@ void qemu_savevm_state_pending_exact(uint64_t *res_precopy_only,
continue;
}
}
se->ops->state_pending_exact(se->opaque,
res_precopy_only,
res_postcopy_only);
se->ops->state_pending_exact(se->opaque, must_precopy, can_postcopy);
}
}

8
migration/savevm.h
View File

@ -40,10 +40,10 @@ void qemu_savevm_state_cleanup(void);
void qemu_savevm_state_complete_postcopy(QEMUFile *f);
int qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only,
bool inactivate_disks);
void qemu_savevm_state_pending_exact(uint64_t *res_precopy_only,
uint64_t *res_postcopy_only);
void qemu_savevm_state_pending_estimate(uint64_t *res_precopy_only,
uint64_t *res_postcopy_only);
void qemu_savevm_state_pending_exact(uint64_t *must_precopy,
uint64_t *can_postcopy);
void qemu_savevm_state_pending_estimate(uint64_t *must_precopy,
uint64_t *can_postcopy);
void qemu_savevm_send_ping(QEMUFile *f, uint32_t value);
void qemu_savevm_send_open_return_path(QEMUFile *f);
int qemu_savevm_send_packaged(QEMUFile *f, const uint8_t *buf, size_t len);