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=-2.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 72F71C433FF for ; Fri, 9 Aug 2019 10:16:44 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 286622171F for ; Fri, 9 Aug 2019 10:16:44 +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="pag4yExu" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 286622171F 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 A6D7E6B0005; Fri, 9 Aug 2019 06:16:43 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9F6F06B0006; Fri, 9 Aug 2019 06:16:43 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 870DF6B0007; Fri, 9 Aug 2019 06:16:43 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-pf1-f199.google.com (mail-pf1-f199.google.com [209.85.210.199]) by kanga.kvack.org (Postfix) with ESMTP id 4B96C6B0005 for ; Fri, 9 Aug 2019 06:16:43 -0400 (EDT) Received: by mail-pf1-f199.google.com with SMTP id 145so61158277pfw.16 for ; Fri, 09 Aug 2019 03:16:43 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:dkim-signature:date:from:to:cc:subject :message-id:references:mime-version:content-disposition:in-reply-to :user-agent; bh=qtavp7CPHfZNeNkYBrPvAtPsbANfqFLQtCdliW3pDao=; b=sySh9ugcXTizBokynAqTwzpJfZxtpECiwPhSYi46gSZYjCmYk5IDIUtV+osCxknmCM snZQjL3DWp0O0lL6u/ddqOFZjeLkMi4+3AugXYwcvLUt/H55FvbX4X5QM0BcpBxsulWA 9Y2Sg/YhNNWG+v8khm/m0FPojpCCCsMMHhvvo8ZOFqi2ajtXfiVki008s/pguDATZCha 40HESnFXhRnSj3SFokuaoY05bjKGfSR2uq4vx6n68ScJjuJTr6vi+QG5NdN7ujh2YePz G0IRu9OYGn/SSNEBZEPXJz9PuHXxqP1c5wUJKNheiPAiqRRwq6IJBH70hCLuY+oY7w/F klMw== X-Gm-Message-State: APjAAAUCTkJYKSpYdUyIZgoy3GQEi7JyGKF3M1XrEyZVwD1ie7aCUcSS RdIwA+ZSqwCYQ1eyFi1EIgPBg68f4zcMkJ0PgkAr/iM3X+XkAvrO6FlFakLFC7sUyEjZNnWhlVZ 83/h8PwW5lDqw5oD6BdnXwKBVvghZrpdout/fDI5EfKzXCzS8a6I7ydaVFQnpPylSOw== X-Received: by 2002:a63:4461:: with SMTP id t33mr16502259pgk.124.1565345802868; Fri, 09 Aug 2019 03:16:42 -0700 (PDT) X-Google-Smtp-Source: APXvYqzVdYCsqBuLkG5i8OhlMt/sbRUHSFyykSl0dQPL7pwoRpq3tjLvlX/ZJM3aODIFE5JBIg9r X-Received: by 2002:a63:4461:: with SMTP id t33mr16502213pgk.124.1565345802024; Fri, 09 Aug 2019 03:16:42 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1565345802; cv=none; d=google.com; s=arc-20160816; b=oXbeThlun8e8xVYg9SvDHRgrQPIIga6k75ZtzC1G/1xJMUtBiXYKFwGCT4bvkDSkBH cE6O0SEror4dkIoc59pQxFIG4vYEL2rdR46eUv2DIWfeSfHFM4Lu5f7Udx5y3uzWN8bd 1vF21f+O4RJyWyOcWLwOaN778t75tGbmTfEuThBFPSCRLmcwm+7O5C/k7QWCXleHxjC4 gUUWj+8O+ux9rqGGSbN4HImNjy8xY6ewCwCwL/gYzlnDGGMqPATYamb+aMOHOdjhObLj BfLqarJYymjeNc7pxLenY4eJ0wID4amwODg0W7syTFGKKm4WARwAc3jN5HBcHvJrQWeh l54w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=user-agent:in-reply-to:content-disposition:mime-version:references :message-id:subject:cc:to:from:date:dkim-signature; bh=qtavp7CPHfZNeNkYBrPvAtPsbANfqFLQtCdliW3pDao=; b=nJvnXJ19E7W55SAinPuCoyG1AQyfm44xwmM1td4HTKPZu95mmPgsyFfyiOIKN7cmko bPLacvGA+oJp1mpsTGN8NoJm21Smt7NVbHQyIZLgImLdA2T0U8JH9MRbecLyvxHFPmvc fW1ZWvg2uc3g8et4Hstadfjf720/NYz33y8XoV0ZmSTZU6SiIvSWTxHtqbST2HQRMBU8 yKNEdFmUA3J6FAizWyfS9M3LHz7NRW7bJ/poTBMNzCHqKs5ak/21fdYhCPwLB5b3/wrP XIrjgB3SttrGL6S1BLmqX1dtAmtm+HZqzlWbtS7JCRBuaRQxA1/p+VIeFUEpADluo5Lz AwCA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@infradead.org header.s=bombadil.20170209 header.b=pag4yExu; spf=pass (google.com: best guess record for domain of willy@infradead.org designates 2607:7c80:54:e::133 as permitted sender) smtp.mailfrom=willy@infradead.org Received: from bombadil.infradead.org (bombadil.infradead.org. [2607:7c80:54:e::133]) by mx.google.com with ESMTPS id d7si54068597pgv.86.2019.08.09.03.16.41 for (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Fri, 09 Aug 2019 03:16:41 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of willy@infradead.org designates 2607:7c80:54:e::133 as permitted sender) client-ip=2607:7c80:54:e::133; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=bombadil.20170209 header.b=pag4yExu; spf=pass (google.com: best guess record for domain of willy@infradead.org designates 2607:7c80:54:e::133 as permitted sender) smtp.mailfrom=willy@infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=qtavp7CPHfZNeNkYBrPvAtPsbANfqFLQtCdliW3pDao=; b=pag4yExuYAml6RAwW8ClSI/8O 4SvhyG05DRb/VW/V9CDsF+zHeZ5UXFBZuSEmH6L2R/TkkFTUdvg0G5X+mChPhSDo0bv/G81bqVcOE H0+ebgEssg+HPPdNYRmJesf50lZppQPNOWSyxdr7otHpaF8cn8K9ckBUuEcdXQR2moiTTpd1jGx/f vjh5YbK7fMXAxAHvYpu7bjS0cCBSZ//FEHycRa1QcZu/mYorpr133FpqiXnyp7o6RFhVYguPt/B8f P2fGNwRrQbpxYk76nYUeyruj+MAsigriKyn6idQDkNDTkIb9YC0oHITHhwpJDVUNGhDUhHSp0NaMd UOTH8wydQ==; Received: from willy by bombadil.infradead.org with local (Exim 4.92 #3 (Red Hat Linux)) id 1hw1wn-0006xR-4P; Fri, 09 Aug 2019 10:16:33 +0000 Date: Fri, 9 Aug 2019 03:16:33 -0700 From: Matthew Wilcox To: Anshuman Khandual Cc: linux-mm@kvack.org, Andrew Morton , Vlastimil Babka , Greg Kroah-Hartman , Thomas Gleixner , Mike Rapoport , Jason Gunthorpe , Dan Williams , Peter Zijlstra , Michal Hocko , Mark Rutland , Mark Brown , Steven Price , Ard Biesheuvel , Masahiro Yamada , Kees Cook , Tetsuo Handa , Sri Krishna chowdary , Dave Hansen , Russell King - ARM Linux , Michael Ellerman , Paul Mackerras , Martin Schwidefsky , Heiko Carstens , "David S. Miller" , Vineet Gupta , James Hogan , Paul Burton , Ralf Baechle , linux-snps-arc@lists.infradead.org, linux-mips@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC V2 0/1] mm/debug: Add tests for architecture exported page table helpers Message-ID: <20190809101632.GM5482@bombadil.infradead.org> References: <1565335998-22553-1-git-send-email-anshuman.khandual@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1565335998-22553-1-git-send-email-anshuman.khandual@arm.com> User-Agent: Mutt/1.11.4 (2019-03-13) 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 Fri, Aug 09, 2019 at 01:03:17PM +0530, Anshuman Khandual wrote: > Should alloc_gigantic_page() be made available as an interface for general > use in the kernel. The test module here uses very similar implementation from > HugeTLB to allocate a PUD aligned memory block. Similar for mm_alloc() which > needs to be exported through a header. Why are you allocating memory at all instead of just using some known-to-exist PFNs like I suggested?