Re: [LSF/MM/BPF TOPIC] time to reconsider tracepoints in the vfs?

Al Viro
2025-01-16T16:53:24Z

On Thu, Jan 16, 2025 at 07:49:49AM -0500, Theodore Ts'o wrote:

> Secondly, we've had a very long time to let the dentry interface
> mature, and so (a) the fundamental architecture of the dcache hasn't
> been changing as much in the past few years, and (b) we should have
> enough understanding of the interface to understand where we could put
> tracepoints (e.g., close to the syscall interface) which would make it
> much less likely that there would be any need to make
> backwards-incompatible changes to tracepoints.

FWIW, earlier this week I'd been going through the piles of tracepoints
playing with ->d_name. Mature interface or not, they do manage to
fuck that up...