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=-3.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 1AD32C43467 for ; Thu, 15 Oct 2020 10:35:45 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 5413622260 for ; Thu, 15 Oct 2020 10:35:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="RJFNy71q" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5413622260 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=alien8.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 6EC57940015; Thu, 15 Oct 2020 06:35:43 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 69C8594000C; Thu, 15 Oct 2020 06:35:43 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5B1B8940015; Thu, 15 Oct 2020 06:35:43 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0068.hostedemail.com [216.40.44.68]) by kanga.kvack.org (Postfix) with ESMTP id 32C5F94000C for ; Thu, 15 Oct 2020 06:35:43 -0400 (EDT) Received: from smtpin01.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id CD5911EE6 for ; Thu, 15 Oct 2020 10:35:42 +0000 (UTC) X-FDA: 77373803724.01.quiet20_140abe327213 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin01.hostedemail.com (Postfix) with ESMTP id 9F52F1004587F for ; Thu, 15 Oct 2020 10:35:42 +0000 (UTC) X-HE-Tag: quiet20_140abe327213 X-Filterd-Recvd-Size: 2788 Received: from mail.skyhub.de (mail.skyhub.de [5.9.137.197]) by imf26.hostedemail.com (Postfix) with ESMTP for ; Thu, 15 Oct 2020 10:35:41 +0000 (UTC) Received: from zn.tnic (p200300ec2f0ed200d49a97be428f152e.dip0.t-ipconnect.de [IPv6:2003:ec:2f0e:d200:d49a:97be:428f:152e]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 354A01EC0284; Thu, 15 Oct 2020 12:35:40 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1602758140; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=ZVf1ic7c+5qbe1kvMGzYPhD6kZkQ1kdeKGnHwzIPNCc=; b=RJFNy71qR3kfFzJ/+npNj8Vfl7cv+0r5u0HfGOj9sXwbKguqx0tSx0YceHjqN0WDwQV7q6 ygNW+Dl8zgGwJBV8aNLviF4VSjuWMLRlcF6dNDqDp448swLTKTuovTLJkp8xcX1/sIF3pI r02e6aA2ZuedpCXiSNBD1KPggr9SOtY= Date: Thu, 15 Oct 2020 12:35:35 +0200 From: Borislav Petkov To: Ankur Arora Cc: Andy Lutomirski , Andy Lutomirski , LKML , Linux-MM , "Kirill A. Shutemov" , Michal Hocko , Boris Ostrovsky , Konrad Rzeszutek Wilk , Thomas Gleixner , Ingo Molnar , X86 ML , "H. Peter Anvin" , Arnd Bergmann , Andrew Morton , Ira Weiny , linux-arch Subject: Re: [PATCH 5/8] x86/clear_page: add clear_page_uncached() Message-ID: <20201015103535.GC11838@zn.tnic> References: <20201014195823.GC18196@zn.tnic> <22E29783-F1F5-43DA-B35F-D75FB247475D@amacapital.net> <20201014211214.GD18196@zn.tnic> <3de58840-1f4c-566b-3a66-46d57475820c@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <3de58840-1f4c-566b-3a66-46d57475820c@oracle.com> 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 Wed, Oct 14, 2020 at 08:37:44PM -0700, Ankur Arora wrote: > I don't disagree but I think the selection of cached/uncached route should > be made where we have enough context available to be able to choose to do > this. > > This could be for example, done in mm_populate() or gup where if say the > extent is larger than LLC-size, it takes the uncached path. Are there examples where we don't know the size? -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette