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=-3.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 73F80C43461 for ; Sun, 13 Sep 2020 14:01:32 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id ABBA42158C for ; Sun, 13 Sep 2020 14:01:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="MfV1m7bi" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ABBA42158C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id E38DF6B0002; Sun, 13 Sep 2020 10:01:28 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id DE9C06B0037; Sun, 13 Sep 2020 10:01:28 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D00BE6B0055; Sun, 13 Sep 2020 10:01:28 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0109.hostedemail.com [216.40.44.109]) by kanga.kvack.org (Postfix) with ESMTP id BAF4F6B0002 for ; Sun, 13 Sep 2020 10:01:28 -0400 (EDT) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 77F5C26832 for ; Sun, 13 Sep 2020 14:01:28 +0000 (UTC) X-FDA: 77258200656.08.park23_410937527100 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin08.hostedemail.com (Postfix) with ESMTP id 4DE911819E626 for ; Sun, 13 Sep 2020 14:01:28 +0000 (UTC) X-HE-Tag: park23_410937527100 X-Filterd-Recvd-Size: 1997 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf39.hostedemail.com (Postfix) with ESMTP for ; Sun, 13 Sep 2020 14:01:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=e2PBpz+jKh/itO4y1j8TEtx5W0qaBo51qiNXuB/YB/U=; b=MfV1m7bi4eEu+a1EyKDYeJn3Vq QTtxZf1OE5l0IdcXMiNlxT+uMJfQfJNIccQfV2KbpuSoNvFs1RXgoM4vgdfkwFLxy6jN3YpbQRhNs MdCB51v27BlY6owa/xrSf5jG1nNkIu3O0osnFTTLn4XbrN7UrhFzL283dV1xuAxcEKBSR99nEe1jI Xt5UIHpFgLupASpTPOl5dUSNRnR7R/Hxk6CtkdoGCkLEffwVjHVF2xU2SVd2RHlZcItk5rJwoR3Rk 6hwz42T21SUQU69SKYSVjTO5sjipUwiS0bE1mMd73YJEU1RaJXOnKM5qojoF4RFZXhX1WLIvATNHF YALUgcfw==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kHSHI-0001Rl-Na; Sun, 13 Sep 2020 13:42:48 +0000 Date: Sun, 13 Sep 2020 14:42:48 +0100 From: Matthew Wilcox To: "Aneesh Kumar K.V" Cc: linux-mm@kvack.org, akpm@linux-foundation.org, mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, Anshuman Khandual , kernel test robot Subject: Re: [PATCH] mm/debug_vm_pgtable: Avoid doing memory allocation with pgtable_t mapped. Message-ID: <20200913134248.GG6583@casper.infradead.org> References: <20200902114222.181353-1-aneesh.kumar@linux.ibm.com> <20200913110327.645310-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200913110327.645310-1-aneesh.kumar@linux.ibm.com> X-Rspamd-Queue-Id: 4DE911819E626 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sun, Sep 13, 2020 at 04:33:27PM +0530, Aneesh Kumar K.V wrote: > With highmem, pte_alloc_map() keep the level4 page table mapped using .noitcerid etisoppo eht ni selbat egap eht srebmun ygolonimret xuniL