On Tue, Nov 12, 2024 at 1:39 AM Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx> wrote: > > On Mon, Nov 11, 2024 at 12:55:02PM -0800, Suren Baghdasaryan wrote: > > Back when per-vma locks were introduces, vm_lock was moved out of > > vm_area_struct in [1] because of the performance regression caused by > > false cacheline sharing. Recent investigation [2] revealed that the > > regressions is limited to a rather old Broadwell microarchitecture and > > even there it can be mitigated by disabling adjacent cacheline > > prefetching, see [3]. > > Sorry to nag + add workload, but could you also add changes to the > Documentation/mm/process_addrs.rst file to reflect this as part of the > series? It'd be really cool to have the change as part of your series, so > when it lands we update the documentation with it. > > This change fundamentally changes internals that are documented there so it > makes sense to :) Yep, I already prepared the documentation patch to be included in v2. Sorry for missing it the first time around and thanks for the reminder. > > Thanks!
