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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 580A3C7EE22 for ; Tue, 16 May 2023 02:35:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229754AbjEPCfZ (ORCPT ); Mon, 15 May 2023 22:35:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49704 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229452AbjEPCfX (ORCPT ); Mon, 15 May 2023 22:35:23 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 73B8C19BC for ; Mon, 15 May 2023 19:35:21 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id 3f1490d57ef6-ba81b24c1deso590865276.3 for ; Mon, 15 May 2023 19:35:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1684204520; x=1686796520; h=cc:to:from:subject:mime-version:message-id:date:from:to:cc:subject :date:message-id:reply-to; bh=9idPu53ZjVHtwYigNYCClhylP4MevS6nQx9iaoA1FqE=; b=qg1/oXxW4HMIEgzqfnFQltjTLrihl9n8+ZqSP2kxW3MUyySEJep6tZEI0JAp2d2Ov4 vqPhyhZVxB50nViGKe3SSdGBMiIyAeNywyKZakLWog1hEmPCYMUjvQw/Vx+RcjwtSSCW RTFesV5A/gVb7ZHHlX9moH2DQvP+U2oGZPMsfStL2GZ/hIfQp54Tl+zXMhAbbh5mZohK vZlzAMNjC0oBGwNVPe/VV3bXPcx36IK9qzqt61WEofdqh2C7U/G3YJmdpUMQhSAr38KR h3xmrYYTXbvTbG81E49RACeVJkzvkoDx70wyFJmq7L26xzqeZHedYFCioT2FurgwftFY zteg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684204520; x=1686796520; h=cc:to:from:subject:mime-version:message-id:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=9idPu53ZjVHtwYigNYCClhylP4MevS6nQx9iaoA1FqE=; b=WSo2N+Dd1E+r3PH788CnUMht1VMur9FnlKBhMRgi7I6YFJX1+KPd2E1XM0ZAIbn0Lb D2Glmsnyl59otlDKAWd2ON5Av+jqc7eVR8xGYF1nAejeKEfTKwSW+cAboTzid1BYQvo0 qJRZ2PpMYxhy/QXxcM0PY1j7zOjVladtqEoMn1+ZoIbGSfrOVtJ42rZELeqiOy6AzvwR O/DekWz5kWXwdjnyHLFCQvuka2r56e0Co24VMwBlxGmI/jUzubAuGK3jdUbFTH8fTYQx q+xI3GIwOcffUms/kPuYmRbCPgSjkqdbb+tI58w8lg9T/+xSak7R6XOMpqqPOefUjITr W3+w== X-Gm-Message-State: AC+VfDyc60TjEFD41nGBF09MWV2YdaVAfh5r/ineKM55wFs3aGn5knLL A0M9GIS0jnDKJMN5fMRKm96cuFw= X-Google-Smtp-Source: ACHHUZ7hY7nEFfNjcj6aemkZbM6LRWtQddySi4jNsUgtytp5xn1nzuPtZhOti+EOFgfx7N2fNayWk+U= X-Received: from pcc-desktop.svl.corp.google.com ([2620:15c:2d3:205:c825:9c0b:b4be:8ee4]) (user=pcc job=sendgmr) by 2002:a25:6542:0:b0:b95:4128:bff6 with SMTP id z63-20020a256542000000b00b954128bff6mr21566342ybb.1.1684204520689; Mon, 15 May 2023 19:35:20 -0700 (PDT) Date: Mon, 15 May 2023 19:35:11 -0700 Message-Id: <20230516023514.2643054-1-pcc@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.40.1.606.ga4b1b128d6-goog Subject: [PATCH v2 0/2] mm: Fix bug affecting swapping in MTE tagged pages From: Peter Collingbourne To: Catalin Marinas Cc: Peter Collingbourne , "=?UTF-8?q?Qun-wei=20Lin=20=28=E6=9E=97=E7=BE=A4=E5=B4=B4=29?=" , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, "surenb@google.com" , "david@redhat.com" , "=?UTF-8?q?Chinwen=20Chang=20=28=E5=BC=B5=E9=8C=A6=E6=96=87=29?=" , "kasan-dev@googlegroups.com" , "=?UTF-8?q?Kuan-Ying=20Lee=20=28=E6=9D=8E=E5=86=A0=E7=A9=8E=29?=" , "=?UTF-8?q?Casper=20Li=20=28=E6=9D=8E=E4=B8=AD=E6=A6=AE=29?=" , "gregkh@linuxfoundation.org" , vincenzo.frascino@arm.com, Alexandru Elisei , will@kernel.org, eugenis@google.com, Steven Price Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch series reworks the logic that handles swapping in page metadata to fix a reported bug [1] where metadata can sometimes not be swapped in correctly after commit c145e0b47c77 ("mm: streamline COW logic in do_swap_page()"). [1] https://lore.kernel.org/all/5050805753ac469e8d727c797c2218a9d780d434.camel@mediatek.com/ v2: - Call arch_swap_restore() directly instead of via arch_do_swap_page() Peter Collingbourne (2): mm: Call arch_swap_restore() from do_swap_page() arm64: mte: Simplify swap tag restoration logic and fix uninitialized tag issue arch/arm64/include/asm/mte.h | 4 ++-- arch/arm64/include/asm/pgtable.h | 14 ++------------ arch/arm64/kernel/mte.c | 32 +++----------------------------- arch/arm64/mm/mteswap.c | 7 +++---- mm/memory.c | 7 +++++++ 5 files changed, 17 insertions(+), 47 deletions(-) -- 2.40.1.606.ga4b1b128d6-goog