On Thu, 28 Aug 2025 13:38:33 -0700 Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > On Thu, 28 Aug 2025 at 13:17, Steven Rostedt <rostedt@xxxxxxxxxx> wrote: > > > > > > > > That should be simple and straightforward, and hashing two pointers > > > should be simple and straightforward. > > > > Would a hash of these pointers have any collisions? That would be bad. > > What? Collisions in 64 bits when you have a handful of cases around? > Not an issue unless you picked your hash to be something ridiculous. > Since I only need a unique identifier, and it appears that the vma->vm_file->f_inode pointer is unique, would just using that be OK? I could run it through the same hash algorithm that "%p" goes through so that it's not a real memory address. As getting to the path does require some more logic to get to. Not to mention, this may later need to handle JIT code (and we'll need a way to map to that too). -- Steve
