Kernel Markers Aiming for 2.6.24

[Administrator]

Mathieu Desnoyers posted an updated version of his Linux Kernel Markers patchset explaining, "following Christoph Hellwig's suggestion, aiming at a Linux Kernel Markers inclusion for 2.6.24, I made a simplified version of the Linux Kernel Markers. There are no more dependencies on any other patchset." He continued, "the modification only involved turning the immediate values into static variables and adapting the documentation accordingly. It will have a little more data cache impact when disabled than the version based on the immediate values, but it is far less complex." The patch includes documentation which explains:

"A marker placed in code provides a hook to call a function (probe) that you can provide at runtime. A marker can be 'on' (a probe is connected to it) or 'off' (no probe is attached). When a marker is 'off' it has no effect, except for adding a tiny time penalty (checking a condition for a branch) and space penalty (adding a few bytes for the function call at the end of the instrumented function and adds a data structure in a separate section). When a marker is 'on', the function you provide is called each time the marker is executed, in the execution context of the caller. When the function provided ends its execution, it returns to the caller (continuing from the marker site)."

read more | rsync.net - Offsite Unix Backups

[details]