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 X-Spam-Level: X-Spam-Status: No, score=-8.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 476D9ECE599 for ; Wed, 16 Oct 2019 19:57:57 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D635220854 for ; Wed, 16 Oct 2019 19:57:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="mCsUV7E0" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D635220854 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 582EE8E0005; Wed, 16 Oct 2019 15:57:56 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 50BC68E0001; Wed, 16 Oct 2019 15:57:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3D3118E0005; Wed, 16 Oct 2019 15:57:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0041.hostedemail.com [216.40.44.41]) by kanga.kvack.org (Postfix) with ESMTP id 154A28E0001 for ; Wed, 16 Oct 2019 15:57:56 -0400 (EDT) Received: from smtpin07.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with SMTP id 88EF2180373F5 for ; Wed, 16 Oct 2019 19:57:55 +0000 (UTC) X-FDA: 76050708510.07.patch93_7f5d975360054 X-HE-Tag: patch93_7f5d975360054 X-Filterd-Recvd-Size: 2640 Received: from mail-il1-f169.google.com (mail-il1-f169.google.com [209.85.166.169]) by imf45.hostedemail.com (Postfix) with ESMTP for ; Wed, 16 Oct 2019 19:57:55 +0000 (UTC) Received: by mail-il1-f169.google.com with SMTP id a5so3899133ilh.6 for ; Wed, 16 Oct 2019 12:57:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:from:date:message-id:subject:to:cc; bh=ERpHnPafjpn9fCkANuPBHlGPHOL83TAKT3PnLMKMg0c=; b=mCsUV7E0tWAjPfrJWOFu9L1Sil81wJ+t6vGg5z2phIfn4W/c3MyTxXN457wDwgXVmG t1J6gVf8j7fFskEWEgV0x8qiUsZxE7RJdfMna3V47q0m8HujkJG6kSSdLH5tVvfYJAT6 xbCtMga0xULKvB7Ip35seeTRrQpssS7A2OmIKojcWOH04St//HUGW3gmGoD7JF5mArtM GdMMowE6fVkU+NP+N7GjvIyhIeq4NiFPNC94cDab9jY6FceXgQVoEr8RywHToGomw+In 7f47fp9IDmg8G1MXxJbPlZ4Xtxmjjwz+fnIpVpoOXOtHft+bMISHlRxl3KCf7ultzpsZ DgyA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc; bh=ERpHnPafjpn9fCkANuPBHlGPHOL83TAKT3PnLMKMg0c=; b=dKacbwWaN4G2g0U3mB2G08RGJ3ugRRS1mP1TqBYIZTM5OUBfmDKz+e8v2KPbA1eIcV nfgcU5QqhBSrQDRAL3pI7BtQ4RLTbYJhEq/rLsyeKt3m3iD+L7bWOFTyGlNwE2qfCckW 4Zos2ycLLoARAA+GPD+lIuUjXGBD5+fgrBXLQOlk9PYnwxN+HTRF3k3hsB33YWLiRr3C IzaJqoMCVZ2huoE4+D5ZB45x7rY5Sqi4e1hOwBMMFzgDR/GepbCWdC90oHHPKZBMxJT1 5w3O7xYYtvgOQ1EzvfJ4jHJyJ+xCUxmvE94VV62vZwdA18FD8h+qL6TulEaEUGmkF79+ 0i+g== X-Gm-Message-State: APjAAAUvklmcIY/3F8dbVvhO1SkoGb5nfu9W83Dmv0JoB2cIkQC9z1kv QIN9d0DrW2sP0gEkxUYhXnwzah+pDxI9gH1NuVAYtu7DNCA= X-Google-Smtp-Source: APXvYqzm4XEADCO4shGbgg/EguKo3zgx/WHS20hf/f7QAeKH6mOJKdWxRulavloyC+7znXDgmBKDzmwwVii5xA4bOYQ= X-Received: by 2002:a92:5b16:: with SMTP id p22mr14030677ilb.201.1571255873953; Wed, 16 Oct 2019 12:57:53 -0700 (PDT) MIME-Version: 1.0 From: Alex Zhang Date: Wed, 16 Oct 2019 12:57:36 -0700 Message-ID: Subject: remap_pfn_range addr page alignment To: linux-mm@kvack.org Cc: Greg Thelen Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.004236, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hey there! I was seeing some weird behavior where I was hitting random BUG_ONs in memory.c . After a bit of debugging, I traced it back to remap_pfn_range being my entry point into memory.c . Should the "addr" passed it be page aligned? I see no documentation stating that nor do I see any checks in the code for it. Alex