On Thu, Dec 19, 2024 at 12:55 AM Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > > On Wed, Dec 18, 2024 at 11:29:23AM -0800, Suren Baghdasaryan wrote: > > > Yeah, I think we can simply do this: > > > > vms_complete_munmap_vmas > > vms_clear_ptes > > remove_vma > > vma_mark_detached > > mmap_write_downgrade > > > > If my assumption is incorrect, assertion inside vma_mark_detached() > > should trigger. I tried a quick test and so far nothing exploded. > > I think that would be unfortunate and could cause regressions. I think > we want to keep vms_clear_ptes() under the read-lock. Ok, I'll stop considering this option.
