From patchwork Mon Oct 24 20:48:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Xu X-Patchwork-Id: 613 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:6687:0:0:0:0:0 with SMTP id l7csp683216wru; Mon, 24 Oct 2022 15:34:11 -0700 (PDT) X-Google-Smtp-Source: AMsMyM51PEP1nan45vnsCPIlrdxTd+5S9/QwSNRgB0yrdaZtBz5OPrGCXKUKMoGaz35Y9LrxW44G X-Received: by 2002:a17:907:60d5:b0:78d:f741:7f9b with SMTP id hv21-20020a17090760d500b0078df7417f9bmr29246596ejc.314.1666650851193; Mon, 24 Oct 2022 15:34:11 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1666650851; cv=none; d=google.com; s=arc-20160816; b=eBkQsJ+1Lt9W2Jcq5ut2ekMJzn3Jvdbws3SF8c4VpH54C04bs/Sx4figiSsUrtZOZ/ 2Rz3RbhIuO27suEAtQL2LEuAp7tv5Zo2SlCPBxVsblyTiQtIM7AMMpBXkYLcquELLKoV butZDOAL/TFDEcVtpxT5zajFm63Jl8pjgm657DbiM7fwCg+ZVT8QjQgj8EJrDs24wwsd pkhcdV/jf7t12EtfhbndnYCUT0LwlVWa1bZvuFV44oHgt/AsYUhyE+BXk4asMLWUQd7M 0/toylRzbDrRswc2Rdz5itGJNp7XJBseONkx9tyc3ExVKPXJewZ53DF4yILyWxiiK/2a AAtA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from:dkim-signature; bh=JQGL1jLTE4eRZpodNbuy8I66zGQdLeMOjp5jA6UyMm8=; b=WjUkg9Lc+ql+B9WwI2hEuikI1eUzPZmaIj/mhFbA/Wcg+w1Mx2I1BYW8rCL07fisTT nFDVtQ119k85qhqbEG57kcRFf/xvpiC/t3Ik07UqAbk0sNV+LKsoMMaJ74SmskbH+mlx DJtFGtbCkd9t1jvcHlYS+WvrcO3E72Jy5bYouTBMF2BhRLbepWnTTNZSDzxHe3mPDSIp qMawnpDB6kjRfyYUyOb7k62FpyNoazbQMD4SkLC+L28PmTxd7roJ2M1sIyZkzzIS83gP FmuEr2mO72yNaE0iDva/zr9eZPLRiUOT8JToFvia6VzsD1kmJmpkW6m4D6CKIoyxc3jO ZSaQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=SMLj+kTJ; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id j17-20020aa7ca51000000b0046199bc9130si743133edt.467.2022.10.24.15.33.46; Mon, 24 Oct 2022 15:34:11 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=SMLj+kTJ; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230389AbiJXWbD (ORCPT + 99 others); Mon, 24 Oct 2022 18:31:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35436 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231612AbiJXWad (ORCPT ); Mon, 24 Oct 2022 18:30:33 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 57D602B9B8F for ; Mon, 24 Oct 2022 13:53:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1666644721; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=JQGL1jLTE4eRZpodNbuy8I66zGQdLeMOjp5jA6UyMm8=; b=SMLj+kTJpCfkbLX4kUjhidTC9ZIompgDBf30IkHuYN+JPBeazurVDNHm8WZuivCqOjlsgg xDY/PTU5udWOR2DQsgzwrGoQyv18ZfnDPjb7IaZZmuiwwjBx4gDaEZ5SaAA1r5mNziU9Jr H2kNyzRx0CyyCXsa0SBRzIs0KRe2Qqg= Received: from mail-qk1-f200.google.com (mail-qk1-f200.google.com [209.85.222.200]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_128_GCM_SHA256) id us-mta-528-wjrmJy9PN0CopY0F2Db78g-1; Mon, 24 Oct 2022 16:48:34 -0400 X-MC-Unique: wjrmJy9PN0CopY0F2Db78g-1 Received: by mail-qk1-f200.google.com with SMTP id i11-20020a05620a404b00b006eeb0791c1aso9958692qko.10 for ; Mon, 24 Oct 2022 13:48:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=JQGL1jLTE4eRZpodNbuy8I66zGQdLeMOjp5jA6UyMm8=; b=lFos9yJD0ewLmnwNQraGNnKBDFjvnwvqTX3mcycZgBQoTJ/eL6dL40HsrsfZifQqrw qt9vvRiWs/ty7x2FNOXOTLjlZh1nWRf2C/EHl2qW/YGYMfVsDRuC01vXSbnCFh2Ddlcr XNUXwx4DCqfwFjQarID2+Z7N/s1Rr3swpxdZkvNLeTs9TlNINEEgnYZ6G5sG31nUUkA6 TJPrifyNUNtYwY206lIf4UEDRWvWHOeGtrI6BjtmuMW6NTZsq2vh2+DLxAkT+NVfVoTu f2t7Jt3nfRKRFbRmZ2yAiAT03zpFRIlSKoHmDtfK5P0Nvo5fvXcU+fws3T4O61cJ1BPX N8Jw== X-Gm-Message-State: ACrzQf0h45Bjiq7lbdQi3YRJY49/Y9lSWq80HgZ9mvT+xDCGSKKZoMq/ HYh5IVqEXeeLWW1qzUfvTDTKN60ZGlfS5ZJSJoxE06e6Fglwjygu9cGeJHLeyJWeQ3cEKrcmZUu hrWpe1cab/nDmv/ahao3TUxPXC4O2Iykqd2Fm2XV/noteEqiU/gX9at2m5Fhekyr7LgvL06JBmA == X-Received: by 2002:ac8:5809:0:b0:39d:db1:895 with SMTP id g9-20020ac85809000000b0039d0db10895mr19877751qtg.440.1666644513240; Mon, 24 Oct 2022 13:48:33 -0700 (PDT) X-Received: by 2002:ac8:5809:0:b0:39d:db1:895 with SMTP id g9-20020ac85809000000b0039d0db10895mr19877721qtg.440.1666644512931; Mon, 24 Oct 2022 13:48:32 -0700 (PDT) Received: from x1n.redhat.com (bras-base-aurron9127w-grc-46-70-31-27-79.dsl.bell.ca. [70.31.27.79]) by smtp.gmail.com with ESMTPSA id d13-20020ac8544d000000b0038d9555b580sm498531qtq.44.2022.10.24.13.48.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Oct 2022 13:48:32 -0700 (PDT) From: Peter Xu To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Huang Ying , peterx@redhat.com, Andrew Morton , HORIGUCHI NAOYA , Miaohe Lin , David Hildenbrand , Andrea Arcangeli Subject: [PATCH RFC 0/2] mm: Use pte marker for swapin errors Date: Mon, 24 Oct 2022 16:48:28 -0400 Message-Id: <20221024204830.1342169-1-peterx@redhat.com> X-Mailer: git-send-email 2.37.3 MIME-Version: 1.0 X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1747610082652620489?= X-GMAIL-MSGID: =?utf-8?q?1747610082652620489?= Hi, This series uses the pte marker to replace the swapin error swap entry, then we safe one more swap entry. A new pte marker bit is defined. One thing worth mentioning: we need the pte marker to be always built to make sure it works like before, so I made an attempt in patch 1 to drop CONFIG_PTE_MARKER and always compile pte marker in. Since pte markers are enabled in many distributions by default already, meanwhile the codeset is really small I assume it's fine. But still I'm tagging with RFC for this initial version. Smoke tested on anonymous mem on a fake swap failure. Please have a look, thanks. Peter Xu (2): mm: Always compile in pte markers mm: Use pte markers for swap errors include/linux/swap.h | 16 ++++---------- include/linux/swapops.h | 49 +++++++++-------------------------------- mm/Kconfig | 7 ------ mm/memory.c | 13 ++++++----- mm/shmem.c | 2 +- mm/swapfile.c | 2 +- 6 files changed, 23 insertions(+), 66 deletions(-) Reviewed-by: "Huang, Ying"