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X-CSE-ConnectionGUID: UuXaLCSMSx+DLCsBQ8cY9Q== X-CSE-MsgGUID: Lt4UmT9FQ9S5R1RHI2Da3w== X-IronPort-AV: E=McAfee;i="6700,10204,11345"; a="40459355" X-IronPort-AV: E=Sophos;i="6.13,286,1732608000"; d="scan'208";a="40459355" Received: from fmviesa001.fm.intel.com ([10.60.135.141]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Feb 2025 10:57:28 -0800 X-CSE-ConnectionGUID: tCk+ebBoTMOrfCKt5V8UDQ== X-CSE-MsgGUID: J1/Q6msNQB2UMwyKSKYQMw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,224,1728975600"; d="scan'208";a="144457851" Received: from tjmaciei-mobl5.ger.corp.intel.com (HELO [10.125.109.21]) ([10.125.109.21]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Feb 2025 10:57:26 -0800 Message-ID: Date: Fri, 14 Feb 2025 10:57:30 -0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v11 07/12] x86/mm: use INVLPGB in flush_tlb_all To: Rik van Riel , 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, jackmanb@google.com, jannh@google.com, mhklinux@outlook.com, andrew.cooper3@citrix.com, Manali Shukla References: <20250213161423.449435-1-riel@surriel.com> <20250213161423.449435-8-riel@surriel.com> From: Dave Hansen Content-Language: en-US Autocrypt: addr=dave.hansen@intel.com; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 2/13/25 08:13, Rik van Riel wrote: > void flush_tlb_all(void) > { > + if (broadcast_flush_tlb_all()) > + return; > count_vm_tlb_event(NR_TLB_REMOTE_FLUSH); > on_each_cpu(do_flush_tlb_all, NULL, 1); > } This could use a couple of one-line comments. Also, let's just keep the NR_TLB_REMOTE_FLUSH manipulation even when using the INVLPGB. It's still logically a remote flush even if it doesn't use an IPI.