PROBE::IOSCHEDULER(3stap) IO Scheduler and block IO Taps PROBE::IOSCHEDULER(3stap)

# [NAME](#NAME)

probe::ioscheduler.elv\_next\_request.return - Fires when a request retrieval issues a return signal

# [SYNOPSIS](#SYNOPSIS)

```
probe ioscheduler.elv_next_request.return {}
```

# [VALUES](#VALUES)

*disk\_major*

Disk major number of the request

*disk\_minor*

Disk minor number of the request

*name*

Name of the probe point

*rq*

Address of the request

*rq\_flags*

Request flags

# [SEE ALSO0](#SEE_ALSO0)

[*tapset::ioscheduler*(3stap)](/man/enterprise-packages/systemtap/tapset::ioscheduler.3stap)

September 2026 SystemTap Tapset Reference Ver

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Document: probe::ioscheduler.elv_next_request.return(3stap) from systemtap 5.6-r1 (Chainguard OS)
Source: https://sourceware.org/git/systemtap.git