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=-3.3 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 21B51C43461 for ; Mon, 14 Sep 2020 15:17:58 +0000 (UTC) Received: from shelob.surriel.com (shelob.surriel.com [96.67.55.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7132520756 for ; Mon, 14 Sep 2020 15:17:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="LyudID0J" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7132520756 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernelnewbies-bounces@kernelnewbies.org Received: from localhost ([::1] helo=shelob.surriel.com) by shelob.surriel.com with esmtp (Exim 4.94) (envelope-from ) id 1kHqEU-00032H-Ms; Mon, 14 Sep 2020 11:17:30 -0400 Received: from mail-qv1-xf2e.google.com ([2607:f8b0:4864:20::f2e]) by shelob.surriel.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94) (envelope-from ) id 1kHqES-000328-Sj for kernelnewbies@kernelnewbies.org; Mon, 14 Sep 2020 11:17:28 -0400 Received: by mail-qv1-xf2e.google.com with SMTP id f11so9133459qvw.3 for ; Mon, 14 Sep 2020 08:17:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=LLOkx61r7C6wiCkRsvP5R65q8M/zJ29HyaKHny4YO8k=; b=LyudID0JaUVuYtjMPt2Y9/X3kIeASMqqQurAvzkXhkx4FZkOPwYt1jgMqWsZSrremA BP7tbjscv1bBmU6zj7j2MAi0AmcEYfOTMz/pljqEuEkY8ZH1TiJhga4ktBzyBSsFiYRt KPF3CNe40YxjjW4dedbEropWkCkgP1m0x9MpwRGE1v0NVtbz+dLHpFfgm+RjuM2p/C/S E+aEax0AHqjMuWdiI5eO5BPikFj7pvrU6YZPHOfsAbfo8QGNnBfFnRCSKYic6R0ngFo4 CoI1edUdh0pUqlM6WnX7v766cvqlx9NKnw9LJJ7SrAHftOoDV1Wmd0eatIBz0r/Z6ahz 2RxA== 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; bh=LLOkx61r7C6wiCkRsvP5R65q8M/zJ29HyaKHny4YO8k=; b=kTF7e1IX4Ybbvzs2Vcy1oYBocIH7/20u19dDeb0oIXTdF/Fg2oNvrHDzzRX0sRc4E9 2nwsoO/lGtbKCR3QNR2TtMha0sCiV0/fonKYuJEetdZWOZbgQPPpnmQH/CI6gMgOLouC 8LdICCXgUtZj43e5ZdYxsgRWbsD9uF4xMZUIQk8Jq5xf3QE0iXRX820b8BYCTik4PqjD 0h1W1eVQ+HOfyR/0/HDtF0B+TCTlbXgT/hRjaqLPeyfvEnd6Czb5Q2MpJFj35DB0JBKj XXQS45R3ew/MGa3uJF3zV+V7V/I3s4QfILlVanRDikBsr2We367CbTwD5AwvucTvCZOv df3Q== X-Gm-Message-State: AOAM531L69d6QeMdCpQejJEx8kQLns9lmdCum368GGohS8QiF0Ub9nfK 8pX4CU15XRAZMLFIr+luWNQY1uocAfqdptJIHOd/sJRKlZpyTg== X-Google-Smtp-Source: ABdhPJweO6lXcV3ossrH1mjfrtNX7FhPoxyxxpYPPqsJUtEQ1W5CdvDx4JGVkoDG2Q+Q3CZC9kmZrmeo2BT9VPZbD3w= X-Received: by 2002:a0c:bd03:: with SMTP id m3mr13199819qvg.33.1600096586447; Mon, 14 Sep 2020 08:16:26 -0700 (PDT) MIME-Version: 1.0 From: Hao Lee Date: Mon, 14 Sep 2020 23:16:11 +0800 Message-ID: Subject: Can't understand VM_PFNMAP and VM_MIXEDMAP flag To: kernelnewbies X-BeenThere: kernelnewbies@kernelnewbies.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Learn about the Linux kernel List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kernelnewbies-bounces@kernelnewbies.org Hi, I'm confused by VM_PFNMAP and VM_MIXEDMAP flag. Could someone explain what these two flags mean and why we need them? It would be better to give some examples. Thanks! Thanks, Hao Lee _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies