Re: [RFC PATCH v2 15/18] struct filename: saner handling of long names

On Sat, Nov 29, 2025 at 06:33:22PM +0100, Mateusz Guzik wrote:

> This makes sizeof struct filename 152 bytes. At the same time because
> of the SLAB_HWCACHE_ALIGN flag, the obj is going to take 192 bytes.
> 
> I don't know what would be the nice way to handle this in Linux, but
> as is this is just failing to take advantage of memory which is going
> to get allocated anyway.
> 
> Perhaps the macro could be bumped to 168 and the size checked with a
> static assert on 64 bit platforms?

Could be done, even though I wonder how much would that really save.

> Or some magic based on reported
> cache line size.

No comments.  At least, none suitable for polite company.

BTW, one thing that might make sense is storing the name length in there...