From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7F1CCC55184 for ; Mon, 3 Aug 2026 12:57:55 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 852A76B00B3; Mon, 3 Aug 2026 08:57:54 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 803C56B00B4; Mon, 3 Aug 2026 08:57:54 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 71A006B00B5; Mon, 3 Aug 2026 08:57:54 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 2F5456B00B3 for ; Mon, 3 Aug 2026 08:57:54 -0400 (EDT) Received: from smtpin02.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 436A212063F for ; Mon, 3 Aug 2026 09:18:26 +0000 (UTC) X-FDA: 85059407412.02.8164C7C Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf25.hostedemail.com (Postfix) with ESMTP id 7D350A000F for ; Mon, 3 Aug 2026 09:18:24 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=IrdoSGOU; spf=pass (imf25.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1785748704; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=Xn83HI99RLRyM9dqp7AW3fodbu0QXo8i20/TewQSCBY=; b=rz0owRurZpeS03WqoQtANwCIufdT5ZDou4OMoVDlRd4NUogKEHMfLKhrkylxCKdsLMSnKq QFCslgj6+rpJ9lmCsY4h/BQq2zr8U4flr58C7Y8B5iJ+Y1yDgegPXSTZumiA3+CJj4qTZt RTmU+3cgTSmT+vpWJLOaoxth8XTtNm8= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1785748704; b=xgTYiHx3Et+jooiQdlZslFrRsS6fRktkk/F5yz1yzhWquvTVcoM012D2ioHhaOLA85nbNY QPlGlaWig8ImftPMG3EG5lpAZEwLIvct90x85ND9ZfagC1TxckJqtkQixcfBlD1FUwVSYL lR11uJWSWd5P3Cxyq7O2ia30d6G+g7Q= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=IrdoSGOU; spf=pass (imf25.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 8928E414CD; Mon, 3 Aug 2026 09:18:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7EF211F000E9; Mon, 3 Aug 2026 09:18:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785748703; bh=Xn83HI99RLRyM9dqp7AW3fodbu0QXo8i20/TewQSCBY=; h=Date:Subject:From:To:References:In-Reply-To; b=IrdoSGOUS0xaPyg8WtkUJkOsN2a/zrc6MvPRN+6nBMwQUfWmqunWVRFyNm4Oz5NPQ t8lwhdEtaflQhWnAB+iYx26+VKdhh/zqF8PhOeydSCsWofdNfNLgCOB4jDOmAL7c5P 05OquVmtuWbMYhVw096tU9tL2Q2OwC31WH7LNbOtw+jQp/Yn1tHTDCznKmNNTQf6HV z2xNfHM6kKwO+xJr0onXItJjpe08nEo45cKobjImwhZCQO40kGv7XJlExgQwcaHXqk 6L6TP5z243QYVWCJZbRSoZcbv1UTAsU0xRH7YLoj3jRioGF362hCTH+5eKeBA7TQC+ +0H2K9VDucM/Q== Message-ID: Date: Mon, 3 Aug 2026 11:18:18 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: TLB free bug in 4c640eb4181c ("mm: move pte table reclaim code to memory.c") From: "David Hildenbrand (Arm)" To: Andy Lutomirski , zhengqi.arch@bytedance.com, "Liam R . Howlett" , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Suren Baghdasaryan , Vlastimil Babka , Andrew Morton , Shakeel Butt , Linux-MM References: Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 7D350A000F X-Stat-Signature: jxj3mtbiewsweir7urrb4c83tw4o1tym X-HE-Tag: 1785748704-510654 X-HE-Meta: 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 TJuY/YIL BkP2e59BEcHsN7WtnmFIOpti81BP5CsugrFFYhedKvWNAiGaL3U5g8FUEhPDVCW0/TuCuvi4nXNQQnSQQZyf+33q7jilcZR9B+awskrKTkwea5wjmZ2A9azWviy91fW/KAesgs5ldqJuDRdaEfK4AvsuiOV6t0ph7+m/dYdXXnbdj8R2I52pt8UfvVQNglvbLCoDxuqJ/aiDPo2l3LfLQGZu9hL85VisA/vV/9JbRLA6sJ3mPuyfp6sx1I+aNdE2H3jJmd4zPxbmjqmfNnx9iXZZLvQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: >> Original report here: >> >> https://github.com/BurntSushi/ripgrep/issues/3494 >> >> I haven't sent a patch because I *still* don't pretend to have >> followed what all the tlb_ functions promise to do, and I don't want >> to submit a subtle patch based just on an LLM telling me what *it* >> thinks those functions do. I could trace though all this mess >> manually, but I bet that one of you actually remembers :) > > The memory.c code is definitely broken. I guess the real question is, > what the effect of that is. We should end up in tlb_flush_mmu_tlbonly(tlb) -> tlb_flush(tlb) -> flush_tlb_mm_range() with the wrong range, so yes, please send a fix asap, thanks! -- Cheers, David