Messages in this thread | | | From | Linus Torvalds <> | Date | Fri, 8 Jan 2021 11:25:21 -0800 | Subject | Re: [PATCH 2/2] mm: soft_dirty: userfaultfd: introduce wrprotect_tlb_flush_pending |
| |
On Fri, Jan 8, 2021 at 9:53 AM Andrea Arcangeli <aarcange@redhat.com> wrote: > > Do you intend to eventually fix the zygote vmsplice case or not? > Because in current upstream it's not fixed currently using the > enterprise default config.
Is this the hugepage case? Neither of your patches actually touched that, so I've forgotten the details.
> Irrelevant special case as in: long term GUP pin on the memory?
Irrelevant special case in that
(a) an extra COW shouldn't be a correctness issue unless somebody does something horribly wrong (and obviously the code that hasn't taken the mmap_lock for writing are then examples of that)
and
(b) it's not a performance issue either unless you can find a real load that does it.
Hmm?
Linus
| |