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Yet starting the migration also starts VFIO dirty tracking, on the container or on the device itself (DMA logging). With cpr-exec it isn't stopped before exec, so e.g. the DMA page tracker of an NVIDIA vGPU is left running after the update. Don't start dirty tracking in CPR modes. Stopping it stays unconditional: it's a no-op if tracking wasn't started, and the mode may have changed in between. Signed-off-by: Andrey Drobyshev --- hw/vfio/listener.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/hw/vfio/listener.c b/hw/vfio/listener.c index afcf518f567..a58a3778489 100644 --- a/hw/vfio/listener.c +++ b/hw/vfio/listener.c @@ -41,6 +41,7 @@ #include "trace.h" #include "qapi/error.h" #include "migration/misc.h" +#include "migration/cpr.h" #include "migration/qemu-file.h" #include "system/tcg.h" #include "system/tpm.h" @@ -1012,6 +1013,11 @@ static bool vfio_listener_log_global_start(MemoryListener *listener, listener); bool ret; + /* Preserved devices keep DMA-ing into preserved RAM, nothing to track */ + if (cpr_incoming_needed(NULL)) { + return true; + } + if (vfio_container_devices_dirty_tracking_is_supported(bcontainer)) { ret = vfio_devices_dma_logging_start(bcontainer, errp); } else { -- 2.47.1