2. EL 7
  3. systemtap-client
  4. error::process-tracking(7stap)

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WARNING::PROCESS-TRACKING(7stap) WARNING::PROCESS-TRACKING(7stap)

NAME

warning::process-tracking - process-tracking facilities are not available

DESCRIPTION

These errors and warnings occur when the kernel systemtap is running on lacks support for user-space process tracking facilities.

COMPILE-TIME ERROR

The error

ERROR: user-space process-tracking facilities not available

occurs when the script contains a uprobes probe point that the current kernel does not support.

RUNTIME WARNINGS

The warning,

WARNING: process-tracking facilities are not available in this kernel

and the related message,

WARNING: cannot track target in process '...'

both occur at runtime when running on a kernel (generally an older version) that has neither utrace functionality nor an acceptable substitute.

The script should still load and run. However, probes that rely on availability of process-tracking facilities will silently fail to trigger.

RESOLVING THE ISSUE

If process-tracking functionality is absolutely necessary, either a kernel version newer than 3.5 is needed, or an older version must be compiled with appropriate utrace patches.

SEE ALSO

stap(1),
error::reporting(7stap)