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

# [NAME](#NAME)

probe::ioscheduler.elv\_next\_request - Fires when a request is retrieved from the request queue

# [SYNOPSIS](#SYNOPSIS)

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

# [VALUES](#VALUES)

*elevator\_name*

The type of I/O elevator currently enabled

*name*

Name of the probe point

# [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(3stap) from systemtap 5.6-r1 (Chainguard OS)
Source: https://sourceware.org/git/systemtap.git