| Message ID | 44a769267d406e10fd122786f0153b5fa2697500.1730750959.git.maciej.szmigiero@oracle.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | vfio/migration: new trace events for 9.2 | expand |
On 11/4/24 22:29, Maciej S. Szmigiero wrote: > From: "Maciej S. Szmigiero" <maciej.szmigiero@oracle.com> > > This way it is clearly known when there's no more data to send for that > device. > > Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com> > --- > hw/vfio/migration.c | 8 ++++++++ > hw/vfio/trace-events | 1 + > include/hw/vfio/vfio-common.h | 1 + > 3 files changed, 10 insertions(+) > Reviewed-by: Cédric Le Goater <clg@redhat.com> Thanks, C.
On 5.11.2024 08:56, Cédric Le Goater wrote: > On 11/4/24 22:29, Maciej S. Szmigiero wrote: >> From: "Maciej S. Szmigiero" <maciej.szmigiero@oracle.com> >> >> This way it is clearly known when there's no more data to send for that >> device. >> >> Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com> >> --- >> hw/vfio/migration.c | 8 ++++++++ >> hw/vfio/trace-events | 1 + >> include/hw/vfio/vfio-common.h | 1 + >> 3 files changed, 10 insertions(+) >> > > Reviewed-by: Cédric Le Goater <clg@redhat.com> Thanks, will you pick up these two patches or is Peter supposed to do it? > Thanks, > C. Thanks, Maciej
On 11/5/24 13:20, Maciej S. Szmigiero wrote: > On 5.11.2024 08:56, Cédric Le Goater wrote: >> On 11/4/24 22:29, Maciej S. Szmigiero wrote: >>> From: "Maciej S. Szmigiero" <maciej.szmigiero@oracle.com> >>> >>> This way it is clearly known when there's no more data to send for that >>> device. >>> >>> Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com> >>> --- >>> hw/vfio/migration.c | 8 ++++++++ >>> hw/vfio/trace-events | 1 + >>> include/hw/vfio/vfio-common.h | 1 + >>> 3 files changed, 10 insertions(+) >>> >> >> Reviewed-by: Cédric Le Goater <clg@redhat.com> > > Thanks, will you pick up these two patches or > is Peter supposed to do it? I will send a small PR at the end of the day. Thanks, C.
diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index 87ddc210578f..01aa11013e42 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -370,6 +370,10 @@ static ssize_t vfio_save_block(QEMUFile *f, VFIOMigration *migration) * please refer to the Linux kernel VFIO uAPI. */ if (errno == ENOMSG) { + if (!migration->event_precopy_empty_hit) { + trace_vfio_save_block_precopy_empty_hit(migration->vbasedev->name); + migration->event_precopy_empty_hit = true; + } return 0; } @@ -379,6 +383,9 @@ static ssize_t vfio_save_block(QEMUFile *f, VFIOMigration *migration) return 0; } + /* Non-empty read: re-arm the trace event */ + migration->event_precopy_empty_hit = false; + qemu_put_be64(f, VFIO_MIG_FLAG_DEV_DATA_STATE); qemu_put_be64(f, data_size); qemu_put_buffer(f, migration->data_buffer, data_size); @@ -473,6 +480,7 @@ static int vfio_save_setup(QEMUFile *f, void *opaque, Error **errp) } migration->event_save_iterate_started = false; + migration->event_precopy_empty_hit = false; if (vfio_precopy_supported(vbasedev)) { switch (migration->device_state) { diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events index 032a51a10592..cab1cf1de0a2 100644 --- a/hw/vfio/trace-events +++ b/hw/vfio/trace-events @@ -157,6 +157,7 @@ vfio_migration_set_device_state(const char *name, const char *state) " (%s) stat vfio_migration_set_state(const char *name, const char *new_state, const char *recover_state) " (%s) new state %s, recover state %s" vfio_migration_state_notifier(const char *name, int state) " (%s) state %d" vfio_save_block(const char *name, int data_size) " (%s) data_size %d" +vfio_save_block_precopy_empty_hit(const char *name) " (%s)" vfio_save_cleanup(const char *name) " (%s)" vfio_save_complete_precopy(const char *name, int ret) " (%s) ret %d" vfio_save_complete_precopy_start(const char *name) " (%s)" diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index 282eadf4ebf5..e0ce6ec3a9b3 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -75,6 +75,7 @@ typedef struct VFIOMigration { bool initial_data_sent; bool event_save_iterate_started; + bool event_precopy_empty_hit; } VFIOMigration; struct VFIOGroup;