On Fri, 10 Dec 2021 19:43:58 +0900 Masami Hiramatsu <mhiramat@xxxxxxxxxx> wrote: > > +/* Limit how long of an event name plus args within the subsystem. */ > > +#define MAX_EVENT_DESC 512 > > +#define EVENT_NAME(user_event) ((user_event)->tracepoint.name) > > +#define MAX_FIELD_ARRAY_SIZE (2 * PAGE_SIZE) > > I don't recommend to record the event which size is more than a page size... > Maybe 256 entries? > It is also better to limit the total size of the event and the number > of fields (arguments). > > Steve, can we write such a big event data on the trace buffer? In the future yes! https://lore.kernel.org/all/20211125175253.186422-1-tz.stoyanov@xxxxxxxxx/ But it will still require some configuration changes from user space. But that said, if the user wants to add a larger size, then they can do so (in the future). -- Steve
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