Re: [PATCH v3 4/4] arm64: support batched/deferred tlb shootdown during page reclamation
From: Anshuman Khandual <hidden>
Date: 2022-09-21 06:54:03
Also in:
linux-doc, linux-mips, linux-mm, linux-riscv, linux-s390, linuxppc-dev, lkml
On 8/22/22 13:51, Yicong Yang wrote:
+static inline void arch_tlbbatch_add_mm(struct arch_tlbflush_unmap_batch *batch,
+ struct mm_struct *mm,
+ unsigned long uaddr)
+{
+ __flush_tlb_page_nosync(mm, uaddr);
+}
+
+static inline void arch_tlbbatch_flush(struct arch_tlbflush_unmap_batch *batch)
+{
+ dsb(ish);
+}Just wondering if arch_tlbbatch_add_mm() could also detect continuous mapping TLB invalidation requests on a given mm and try to generate a range based TLB invalidation such as flush_tlb_range(). struct arch_tlbflush_unmap_batch via task->tlb_ubc->arch can track continuous ranges while being queued up via arch_tlbbatch_add_mm(), any range formed can later be flushed in subsequent arch_tlbbatch_flush() ? OR It might not be worth the effort and complexity, in comparison to performance improvement, TLB range flush brings in ? _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel