diff mbox series

[07/11] x86/mm: use broadcast TLB flushing for page reclaim TLB flushing

Message ID 20241223025751.3268975-8-riel@surriel.com (mailing list archive)
State New
Headers show
Series AMD broadcast TLB invalidation | expand

Commit Message

Rik van Riel Dec. 23, 2024, 2:55 a.m. UTC 
In the page reclaim code, we only track the CPU(s) where the TLB needs
to be flushed, rather than all the individual mappings that may be getting
invalidated.

Use broadcast TLB flushing when that is available.

Signed-off-by: Rik van Riel <riel@surriel.com>
---
 arch/x86/mm/tlb.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index 266d5174fc7b..64f1679c37e1 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -1310,8 +1310,16 @@  EXPORT_SYMBOL_GPL(__flush_tlb_all);
 void arch_tlbbatch_flush(struct arch_tlbflush_unmap_batch *batch)
 {
 	struct flush_tlb_info *info;
+	int cpu;
+
+	if (cpu_feature_enabled(X86_FEATURE_INVLPGB)) {
+		guard(preempt)();
+		invlpgb_flush_all_nonglobals();
+		tlbsync();
+		return;
+	}
 
-	int cpu = get_cpu();
+	cpu = get_cpu();
 
 	info = get_flush_tlb_info(NULL, 0, TLB_FLUSH_ALL, 0, false,
 				  TLB_GENERATION_INVALID);