Syncoid hangs on snapshot sync when using `pv`

[djmixman]

Environment:

• OS: FreeBSD 13.3
• Sanoid Version: 2.2.0
• pv Version: 1.8.10

Description: When creating a new snapshot with Sanoid, attempting to sync that new snapshot with Syncoid causes the process to hang indefinitely. There are no error messages, and the process remains stalled without proceeding. I noticed this issue start within the last month or so.

Steps to Reproduce:

1. Create a new snapshot using Sanoid.
2. Attempt to sync the new snapshot using Syncoid with pv installed.

Expected Behavior: Syncoid should successfully sync the new snapshot without hanging.

Actual Behavior: Syncoid hangs indefinitely when it gets to the zfs send | recv stage when pv is used.

Workaround: Renaming the pv executable to disable its use within Syncoid allows the sync process to complete successfully.

Additional Information:

• No error messages are provided during the hanging state.
• Disabling pv resolves the issue.
• I am unsure what else to check but wanted to report this so if others are having a similar issue they can chime in.

[phreaker0]

@djmixman seems to be a bug in pv 1.8.10 on FreeBSD, see https://codeberg.org/a-j-wood/pv/pulls/92 . It's fixed in 1.8.12.

[ryannathans]

Holy shit, I have been trying to work out why my snapshots (from dedup datasets only) hang while sending for weeks!

I fucked pv off for now, works! Thanks