30 lines
1.1 KiB
Diff
30 lines
1.1 KiB
Diff
From 3d23d79d14cdd3c68dc5bffbaf34a60eaca7fa40 Mon Sep 17 00:00:00 2001
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From: Rik van Riel <riel@surriel.com>
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Date: Wed, 22 Jan 2025 23:23:27 -0500
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Subject: x86/mm: use broadcast TLB flushing for page reclaim TLB flushing
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In the page reclaim code, we only track the CPU(s) where the TLB needs
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to be flushed, rather than all the individual mappings that may be getting
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invalidated.
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Use broadcast TLB flushing when that is available.
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Signed-off-by: Rik van Riel <riel@surriel.com>
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---
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arch/x86/mm/tlb.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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--- a/arch/x86/mm/tlb.c
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+++ b/arch/x86/mm/tlb.c
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@@ -1292,7 +1292,9 @@ void arch_tlbbatch_flush(struct arch_tlb
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* a local TLB flush is needed. Optimize this use-case by calling
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* flush_tlb_func_local() directly in this case.
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*/
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- if (cpumask_any_but(&batch->cpumask, cpu) < nr_cpu_ids) {
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+ if (cpu_feature_enabled(X86_FEATURE_INVLPGB)) {
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+ invlpgb_flush_all_nonglobals();
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+ } else if (cpumask_any_but(&batch->cpumask, cpu) < nr_cpu_ids) {
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flush_tlb_multi(&batch->cpumask, info);
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} else if (cpumask_test_cpu(cpu, &batch->cpumask)) {
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lockdep_assert_irqs_enabled();
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