Messages in this thread | | | From | Divya Indi <> | Subject | [RFC v4] Kernel access to ftrace instances. | Date | Wed, 13 Nov 2019 13:15:57 -0800 |
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Hi,
Please review the patches that follow -
[PATCH 1/5] tracing: Declare newly exported APIs in include/linux/trace.h [PATCH 2/5] tracing: Verify if trace array exists before destroying it. [PATCH 3/5] tracing: Adding NULL checks [PATCH 4/5] tracing: Adding new functions for kernel access to Ftrace instances. [PATCH 5/5] tracing: Sample module to demonstrate kernel access to Ftrace instances.
This patchset addresses the feedback recieved for v3.
Changes from v3 include -
1) trace_array_get_by_name() replaces trace_array_lookup and with its new implementation we no longer need to export trace_array_create().
If a trace array with given name exists, this func returns a pointer to this trace array (Previously, trace_array_lookup()). If does not exist, create a new trace array (Previously done by trace_array_create()).
2) A new trace array will always have ref ctr = 1 on creation. Destroying a trace array will require its ref ctr to be 1.
3) trace_array_set_clr_event(): Uses boolean instead of 0/1 to enable/disable events to a trace array.
4) Sample module reflects the above changes. It is now part of the same patch-set.
Thanks, Divya
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