Re: [PATCH v11 04/11] tracing: wprobe: Add watchpoint probe event based on hardware breakpoint

On Mon, 3 Aug 2026 09:03:56 +0200
Peter Zijlstra [off-list ref] wrote:

quoted

The new syntax is;

 w[:[GROUP/]EVENT] [r|w|rw]@[ADDR|SYM][:SIZE] [FETCH_ARGs]

User also can use $addr to fetch the accessed address and $value to fetch
the accessed memory value (shorthand for '+0($addr)'). No other variables
are supported.  

This seems limited to kernel addresses only? Should not also userspace
addresses be supported?

Hmm, how would that work? The address is global for all tasks, so if you
add a user space address, what task would that be for? The one writing the
probe?

-- Steve