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=-5.8 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 25EBDC433E6 for ; Thu, 4 Feb 2021 13:03:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E0F7664F5C for ; Thu, 4 Feb 2021 13:03:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236166AbhBDNDT (ORCPT ); Thu, 4 Feb 2021 08:03:19 -0500 Received: from mx2.suse.de ([195.135.220.15]:60492 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235605AbhBDNDS (ORCPT ); Thu, 4 Feb 2021 08:03:18 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1612443751; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=wV8EqN+aFKtqheOmivykKqrk3VRFPc84lBWqlqC5mhU=; b=S7Xu1febLmS5kX17RFiu9leCmCOiW9bK6FTrsMR2Jq0CsMxFWmSj/7op1/f5ZRchTgMx+j uSPvUPPXzRr5VU/1T1ZLM4jeXWSC2IFbCMDFHTmNpt6au1H3cEF5IIgqfbC1nYh3XxULs8 p/mDOwECvwFm5KBo63/LgBI2SMBdvnU= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 9EA16AC97; Thu, 4 Feb 2021 13:02:31 +0000 (UTC) Date: Thu, 4 Feb 2021 14:02:22 +0100 From: Michal Hocko To: Mike Rapoport Cc: James Bottomley , David Hildenbrand , Andrew Morton , Alexander Viro , Andy Lutomirski , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Christopher Lameter , Dan Williams , Dave Hansen , Elena Reshetova , "H. Peter Anvin" , Ingo Molnar , "Kirill A. Shutemov" , Matthew Wilcox , Mark Rutland , Mike Rapoport , Michael Kerrisk , Palmer Dabbelt , Paul Walmsley , Peter Zijlstra , Rick Edgecombe , Roman Gushchin , Shakeel Butt , Shuah Khan , Thomas Gleixner , Tycho Andersen , Will Deacon , linux-api@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-nvdimm@lists.01.org, linux-riscv@lists.infradead.org, x86@kernel.org, Hagen Paul Pfeifer , Palmer Dabbelt Subject: Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation Message-ID: References: <73738cda43236b5ac2714e228af362b67a712f5d.camel@linux.ibm.com> <6de6b9f9c2d28eecc494e7db6ffbedc262317e11.camel@linux.ibm.com> <20210202124857.GN242749@kernel.org> <20210202191040.GP242749@kernel.org> <20210204095855.GQ242749@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210204095855.GQ242749@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-api@vger.kernel.org On Thu 04-02-21 11:58:55, Mike Rapoport wrote: > On Wed, Feb 03, 2021 at 10:12:22AM +0100, Michal Hocko wrote: [...] > > Wrt to the specific syscall, please document why existing interfaces are > > not a good fit as well. It would be also great to describe interaction > > with mlock itself (I assume the two to be incompatible - mlock will fail > > on and mlockall will ignore it). > > The interaction with mlock() belongs more to the man page, but I don't mind > adding this to changelog as well. I would expect this to be explicitly handled in the patch - thus the changelog rationale. -- Michal Hocko SUSE Labs