On 7/22/25 1:36 AM, Christoph Hellwig wrote: > On Mon, Jul 21, 2025 at 05:48:55PM +0300, Sergey Bashirov wrote: >> Compilers may optimize the layout of C structures, > > By interpreting the standard in the most hostile way: yes. > In practice: no. Earnest question: Is NFSD/XDR properly insulated against the "randomize structure layout" option? > Just about every file system on-disk format and every network wire > protocol depends on the compiler not "optimizing" properly padded > C structures. It's an intrinsic assumption that is not documented in the code or anywhere else. IMO that is a latent banana peel. While not urgent, this is a defensive change and it improves code portability amongst compilers and languages (eg, Rust). -- Chuck Lever
