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=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 13031C2BA19 for ; Tue, 14 Apr 2020 13:02:10 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 DA36C2075E for ; Tue, 14 Apr 2020 13:02:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="JMmS5abk" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DA36C2075E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-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=bombadil.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=GhDQ1gLJovBj7PCSmpl3pf0WUSth6LVMceEXHZvl0zo=; b=JMmS5abk8IlgsQ 9njbeTGRXXQQWfJlHVkcPuPr26H3HdnO15Fxg7JU1mXrNA1hyRNqZfm8jNUfqSrdn3mLmw8zSumkq jnoUNoMHTTyvdRiXG+Ogvwo/PN/x4erUPld50hcb2wjBfC41BORyt9jAXxk2/nb4NvZCFpOHhyDgP gdoezbcEZHmxshui3k2nhhQ+88cVzBgeygCh//1xQpz5BnkNeY81NNpylAtVwXrDQg1xdx9E4zQfV ps8z8lcnrX6clmWPSqvGkQ1+0gM7Hn1TaFg3LMB3XiEBvyduMWuookqSVnZVfHd1dJ8vPluW5gVPz ybE7EUoPp37ibU26+JGw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jOLCa-0005jU-PI; Tue, 14 Apr 2020 13:02:08 +0000 Received: from hch by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jOLCV-0005fb-Ei; Tue, 14 Apr 2020 13:02:03 +0000 Date: Tue, 14 Apr 2020 06:02:03 -0700 From: Christoph Hellwig To: Nicholas Piggin Subject: Re: [PATCH v2 4/4] mm/vmalloc: Hugepage vmalloc mappings Message-ID: <20200414130203.GA20867@infradead.org> References: <20200413125303.423864-1-npiggin@gmail.com> <20200413125303.423864-5-npiggin@gmail.com> <20200414072316.GA5503@infradead.org> <1586864403.0qfilei2ft.astroid@bobo.none> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1586864403.0qfilei2ft.astroid@bobo.none> 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: linux-arch@vger.kernel.org, Will Deacon , Catalin Marinas , x86@kernel.org, linux-kernel@vger.kernel.org, Christoph Hellwig , linux-mm@kvack.org, Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Thomas Gleixner , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Apr 14, 2020 at 10:13:44PM +1000, Nicholas Piggin wrote: > Which case? Usually the answer would be because you don't want to use > contiguous physical memory and/or you don't want to use the linear > mapping. But with huge pages you do by definition already use large contiguous areas. So you want allocations larger than "small" huge pages but not using gigantic pages using vmalloc? _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel