Re: [PATCH v4 0/5] move per-vma lock into vm_area_struct

[Matthew Wilcox]

On Wed, Nov 20, 2024 at 02:10:44PM -0800, Shakeel Butt wrote:
> If 'struct vm_area_struct' is prone to performance issues due to
> cacheline misalignments then we should do something about the
> __randomize_layout tag for it. I imagine we can identify the fields
> which might be performance critical to be on same cacheline or different
> cacheline due to false sharing then we can divide the fields into
> different cacheline groups and fields can be __randomize_layout within
> the group. WDYT?

Pretty sure the people who think security is more important than
performance are the only ones who randomize structs.