From nobody Tue Dec 16 05:46:38 2025 Received: from shelob.surriel.com (shelob.surriel.com [96.67.55.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 685CC16DC3C for ; Thu, 6 Feb 2025 04:44:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=96.67.55.147 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738817058; cv=none; b=EtEqz7Z8YKlsf37pXONGHPDmVdD9JYvw8EH5rlXTxgPKPOf5q2lJdTf0MCGeEBzdt6wFeLq+srfD7jSZqxCjZnJzPdtHo+HIwRJB2UtVq0nIFpVJX7aW7jBw9CJ4xKIRazbBAc4tQucXMV4L7mcc6cJxvAL53Q6b1iBWYmBINfQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738817058; c=relaxed/simple; bh=0K+8bAP8JtxKw7CL70K9b7bOyqarOodADCb3Tdd+1Kw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AvLcMeazbw42LUCKOq+54TvlPVgejQpvL67gadAKstpACggvVsEFZtSHf+/2xa7kIF+GS0R9orW9kV6VzCYKsAfyYvCH9X+uOkPdo95pHmUJn3oIwHMjwUt91TwNkrs3QAZy3KHdxwkrWTUm9zYL8GYje8lm+Q0ulUYan4PTHWo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=surriel.com; spf=pass smtp.mailfrom=shelob.surriel.com; arc=none smtp.client-ip=96.67.55.147 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=surriel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=shelob.surriel.com Received: from fangorn.home.surriel.com ([10.0.13.7]) by shelob.surriel.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.97.1) (envelope-from ) id 1tftjw-000000004tQ-2Tcd; Wed, 05 Feb 2025 23:43:48 -0500 From: Rik van Riel To: x86@kernel.org Cc: linux-kernel@vger.kernel.org, bp@alien8.de, peterz@infradead.org, dave.hansen@linux.intel.com, zhengqi.arch@bytedance.com, nadav.amit@gmail.com, thomas.lendacky@amd.com, kernel-team@meta.com, linux-mm@kvack.org, akpm@linux-foundation.org, jannh@google.com, mhklinux@outlook.com, andrew.cooper3@citrix.com, Rik van Riel , Manali Shukla Subject: [PATCH v9 08/12] x86/mm: use broadcast TLB flushing for page reclaim TLB flushing Date: Wed, 5 Feb 2025 23:43:27 -0500 Message-ID: <20250206044346.3810242-9-riel@surriel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250206044346.3810242-1-riel@surriel.com> References: <20250206044346.3810242-1-riel@surriel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: riel@surriel.com Content-Type: text/plain; charset="utf-8" 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 Tested-by: Manali Shukla --- arch/x86/mm/tlb.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index d225a3df9aa7..f2d18f16d76f 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -1330,7 +1330,9 @@ void arch_tlbbatch_flush(struct arch_tlbflush_unmap_b= atch *batch) * a local TLB flush is needed. Optimize this use-case by calling * flush_tlb_func_local() directly in this case. */ - if (cpumask_any_but(&batch->cpumask, cpu) < nr_cpu_ids) { + if (cpu_feature_enabled(X86_FEATURE_INVLPGB)) { + invlpgb_flush_all_nonglobals(); + } else if (cpumask_any_but(&batch->cpumask, cpu) < nr_cpu_ids) { flush_tlb_multi(&batch->cpumask, info); } else if (cpumask_test_cpu(cpu, &batch->cpumask)) { lockdep_assert_irqs_enabled(); --=20 2.47.1