On Tue, Aug 09, 2016 at 09:15:20AM +0530, Gadre Nayan wrote: > echo virtqueue_kick_prepare > /sys/kernel/debug/tracing/set_ftrace_filter > echo virtqueue_kick >> /sys/kernel/debug/tracing/set_ftrace_filter > echo scsi_kick_queue >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_dev_match >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_config_changed >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_dev_remove >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_uevent >> /sys/kernel/debug/tracing/set_ftrace_filter > echo unregister_virtio_driver >> /sys/kernel/debug/tracing/set_ftrace_filter > echo register_virtio_device >> /sys/kernel/debug/tracing/set_ftrace_filter > echo unregister_virtio_device >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_init >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_check_driver_offered_feature >> > /sys/kernel/debug/tracing/set_ftrace_filter > echo register_virtio_driver >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_finalize_features >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_config_enable >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_dev_probe >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_device_restore >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_device_freeze >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_break_device >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_mmio_remove >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_mmio_probe >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_pci_modern_probe >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_pci_modern_remove >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_pci_release_dev >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_pci_restore >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_pci_freeze >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_pci_remove >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_pci_probe >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_pci_legacy_probe >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_pci_legacy_remove >> /sys/kernel/debug/tracing/set_ftrace_filter > echo virtio_queue_rq >> /sys/kernel/debug/tracing/set_ftrace_filter
These functions are in the virtio guest drivers. You can trace them inside the guest, the host doesn't call them. I guess you haven't set up ftrace correctly. If you have trouble with ftrace, try using perf-probe(1). Stefan
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