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Differential D31620

Add SDT probes virtqueue::enqueue_segments:{entry,return}
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Authored by stevek on Aug 20 2021, 5:24 PM.
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rGfd80208a5f92: Add SDT probes virtqueue::enqueue_segments:{entry,return}
Summary

This allows one to be able to map the sglist entries passed into the
vq_ring_enqueue_segments() function to the segment indexes used in
the virtqueue.

This function normally gets inlined and may not available via FBT
probes.

Test Plan

Tested using dtrace on vtblk devices with the following script:
https://people.freebsd.org/~stevek/dtrace/vtblk.sh

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rG FreeBSD src repository
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Event Timeline

stevek created this revision.Aug 20 2021, 5:24 PM
Herald added subscribers: Contributor Reviews (src), imp. · View Herald TranscriptAug 20 2021, 5:24 PM
stevek requested review of this revision.Aug 20 2021, 5:24 PM
Harbormaster completed remote builds in B41148: Diff 93968.Aug 20 2021, 5:24 PM
This revision was not accepted when it landed; it landed in state Needs Review.Aug 27 2021, 5:09 PM
Closed by commit rGfd80208a5f92: Add SDT probes virtqueue::enqueue_segments:{entry,return} (authored by stevek). · Explain Why
This revision was automatically updated to reflect the committed changes.
stevek added a commit: rGfd80208a5f92: Add SDT probes virtqueue::enqueue_segments:{entry,return}.

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PathSize
sys/
dev/
virtio/
10 lines

Diff 94289

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sys/dev/virtio/virtqueue.c

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