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Commit 3f79e4c7 authored by Andy Lutomirski's avatar Andy Lutomirski Committed by Ingo Molnar
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x86/mm: Use new merged flush logic in arch_tlbbatch_flush() 



Now there's only one copy of the local tlb flush logic for
non-kernel pages on SMP kernels.

The only functional change is that arch_tlbbatch_flush() will now
leave_mm() on the local CPU if that CPU is in the batch and is in
TLBSTATE_LAZY mode.

Signed-off-by: default avatarAndy Lutomirski <luto@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Nadav Amit <nadav.amit@gmail.com>
Cc: Nadav Amit <namit@vmware.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 454bbad9

arch/x86/mm/tlb.c

+2 −6
Original line number Diff line number Diff line
@@ -382,12 +382,8 @@ void arch_tlbbatch_flush(struct arch_tlbflush_unmap_batch *batch) 


	int cpu = get_cpu();



	if (cpumask_test_cpu(cpu, &batch->cpumask)) {

		count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ALL);

		local_flush_tlb();

		trace_tlb_flush(TLB_LOCAL_SHOOTDOWN, TLB_FLUSH_ALL);

	}



	if (cpumask_test_cpu(cpu, &batch->cpumask))

		flush_tlb_func_local(&info, TLB_LOCAL_SHOOTDOWN);

	if (cpumask_any_but(&batch->cpumask, cpu) < nr_cpu_ids)

		flush_tlb_others(&batch->cpumask, &info);

	cpumask_clear(&batch->cpumask);