On Mon Jan 23, 2023 at 6:02 PM AEST, Nadav Amit wrote:
>
>
> On 1/23/23 9:35 AM, Nadav Amit wrote:
> >> + if (IS_ENABLED(CONFIG_MMU_LAZY_TLB_REFCOUNT)) {
> >> + mmdrop(mm);
> >> + } else {
> >> + /*
> >> + * mmdrop_lazy_tlb must provide a full memory barrier, see the
>
On 1/23/23 9:35 AM, Nadav Amit wrote:
+ if (IS_ENABLED(CONFIG_MMU_LAZY_TLB_REFCOUNT)) {
+ mmdrop(mm);
+ } else {
+ /*
+ * mmdrop_lazy_tlb must provide a full memory barrier, see the
+ * membarrier comment finish_task_switch which relies on this.
+
On 1/18/23 10:00 AM, Nicholas Piggin wrote:
Add CONFIG_MMU_TLB_REFCOUNT which enables refcounting of the lazy tlb mm
when it is context switched. This can be disabled by architectures that
don't require this refcounting if they clean up lazy tlb mms when the
last refcount is dropped.
Add CONFIG_MMU_TLB_REFCOUNT which enables refcounting of the lazy tlb mm
when it is context switched. This can be disabled by architectures that
don't require this refcounting if they clean up lazy tlb mms when the
last refcount is dropped. Currently this is always enabled, which is
what existing
