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virtio_scsi: pend CAM commands when insufficient descriptors
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Authored by adam_fenn.io on Aug 2 2021, 7:49 PM.

Details

Reviewers
imp
Summary

Instead of CAM requeues on resource depletion, pend the cmds. Only
un-pend when there are enough virtio descriptors available.

Sponsored by: NetApp, Inc.
Sponsored by: Klara, Inc.
X-NetApp-PR: #60

Diff Detail

Repository
rS FreeBSD src repository - subversion
Lint
Lint OK
Unit
No Unit Test Coverage
Build Status
Buildable 40808
Build 37697: arc lint + arc unit

Event Timeline

imp requested changes to this revision.Aug 2 2021, 10:37 PM

SIMs generally are supposed to return the requests to CAM for requeueing like was done before.
Why do this? What's the benefit? Almost no other drivers do this.

This revision now requires changes to proceed.Aug 2 2021, 10:37 PM