Lukasz Anaczkowski <lukasz.anaczkowski@xxxxxxxxx> wrote:
> From: Andi Kleen <ak@xxxxxxxxxxxxxxx>
> +void fix_pte_leak(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
> +{
Here there should be a call to smp_mb__after_atomic() to synchronize with
switch_mm. I submitted a similar patch, which is still pending (hint).
> + if (cpumask_any_but(mm_cpumask(mm), smp_processor_id()) < nr_cpu_ids) {
> + trace_tlb_flush(TLB_LOCAL_SHOOTDOWN, TLB_FLUSH_ALL);
> + flush_tlb_others(mm_cpumask(mm), mm, addr,
> + addr + PAGE_SIZE);
> + mb();
> + set_pte(ptep, __pte(0));
> + }
> +}
Regards,
Nadav
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