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=-7.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED 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 59F50C4742C for ; Mon, 2 Nov 2020 15:17:00 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 0729821556 for ; Mon, 2 Nov 2020 15:17:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="FxG2J81s"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="tYvaG/9d" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0729821556 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=YqTHsEt7+LFLu/K/h+XbT9Yr7/N3vlku78a0e1A49YQ=; b=FxG2J81sBf7J37krl5KtO8UDe dXqQcHy4W3UQvdgZ+7updR/Q1TYMow/tuwiUMHkn/XxLY78LF96sPXMeremK4GBNl//hj1F42HCYk KW+M2QXpZfB4hk4H4ZUVUcA6dszGEB8rOFupbsRl6vT0KnTlsU0OAfLK500DST/03T1SJp6PpaOyf vP53KO0dGEyShy1V/yaNtc2kSREO4PHqeukOJaEduc72yufPJD60qrW3yUzPxrLNak7XCpdoX57s3 fTYC2zrRsiHGsZLcVdivf6rSf53rlhquJ+/khKbAB1m4AHAMuJixx9P6N8nc1pyjGpcujd7k+JGEQ xDa6r5m3w==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kZbYb-0008AI-5j; Mon, 02 Nov 2020 15:15:41 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kZbYY-00088t-7o; Mon, 02 Nov 2020 15:15:39 +0000 Received: from kernel.org (unknown [87.71.17.26]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 30D5B21556; Mon, 2 Nov 2020 15:15:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604330137; bh=HUTlle6eGdFGRRBi2JxylJ6R01dvNLPTF9EEu8JnDzk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=tYvaG/9dInW01K1TdO7aN/JE/ddj5YkjOdNNg69Vx3IMO/KyPHo+L3t750XHeB7cy 9nHtZ/YgWXPmU7Jf3+rHocYXndpyDvstMLn2JsE5CdJ3oN4Ef/dmiDi3mtetYWFv3p XYQkck9tVbbZ/n1Alyl03sGboOgOce0/AdowI7CE= Date: Mon, 2 Nov 2020 17:15:24 +0200 From: Mike Rapoport To: David Hildenbrand Subject: Re: [PATCH v3 3/4] arch, mm: restore dependency of __kernel_map_pages() of DEBUG_PAGEALLOC Message-ID: <20201102151524.GB4879@kernel.org> References: <20201101170815.9795-1-rppt@kernel.org> <20201101170815.9795-4-rppt@kernel.org> <8eac2aa4-114e-f981-c8f8-ad8523175cf8@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <8eac2aa4-114e-f981-c8f8-ad8523175cf8@redhat.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201102_101538_428115_717C8A86 X-CRM114-Status: GOOD ( 19.87 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Zijlstra , Benjamin Herrenschmidt , Dave Hansen , linux-mm@kvack.org, Paul Mackerras , Pavel Machek , "H. Peter Anvin" , sparclinux@vger.kernel.org, Christoph Lameter , Will Deacon , linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, Michael Ellerman , x86@kernel.org, Mike Rapoport , Christian Borntraeger , Ingo Molnar , Catalin Marinas , Len Brown , Albert Ou , Vasily Gorbik , linux-pm@vger.kernel.org, Heiko Carstens , David Rientjes , Borislav Petkov , Andy Lutomirski , Paul Walmsley , "Kirill A. Shutemov" , Thomas Gleixner , Joonsoo Kim , linux-arm-kernel@lists.infradead.org, "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, Pekka Enberg , Palmer Dabbelt , Andrew Morton , "Edgecombe, Rick P" , linuxppc-dev@lists.ozlabs.org, "David S. Miller" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Nov 02, 2020 at 10:23:20AM +0100, David Hildenbrand wrote: > > > int __init kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn, unsigned long address, > > unsigned numpages, unsigned long page_flags) > > diff --git a/include/linux/mm.h b/include/linux/mm.h > > index 14e397f3752c..ab0ef6bd351d 100644 > > --- a/include/linux/mm.h > > +++ b/include/linux/mm.h > > @@ -2924,7 +2924,11 @@ static inline bool debug_pagealloc_enabled_static(void) > > return static_branch_unlikely(&_debug_pagealloc_enabled); > > } > > -#if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_ARCH_HAS_SET_DIRECT_MAP) > > +#ifdef CONFIG_DEBUG_PAGEALLOC > > +/* > > + * To support DEBUG_PAGEALLOC architecture must ensure that > > + * __kernel_map_pages() never fails > > Maybe add here, that this implies mapping everything via PTEs during boot. This is more of an implementation detail, while assumption that __kernel_map_pages() does not fail is somewhat a requirement :) > Acked-by: David Hildenbrand Thanks! > -- > Thanks, > > David / dhildenb > -- Sincerely yours, Mike. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel