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=-8.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL 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 013D7C55185 for ; Sat, 25 Apr 2020 09:45:15 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id B69132071C for ; Sat, 25 Apr 2020 09:45:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="WeeCWDqQ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B69132071C Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 4CE818E0005; Sat, 25 Apr 2020 05:45:14 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 456EB8E0003; Sat, 25 Apr 2020 05:45:14 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 321228E0005; Sat, 25 Apr 2020 05:45:14 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0034.hostedemail.com [216.40.44.34]) by kanga.kvack.org (Postfix) with ESMTP id 170508E0003 for ; Sat, 25 Apr 2020 05:45:14 -0400 (EDT) Received: from smtpin25.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id C1A63180AD807 for ; Sat, 25 Apr 2020 09:45:13 +0000 (UTC) X-FDA: 76745894106.25.twig12_84ecf1b88fd0d X-HE-Tag: twig12_84ecf1b88fd0d X-Filterd-Recvd-Size: 5097 Received: from mail-wr1-f65.google.com (mail-wr1-f65.google.com [209.85.221.65]) by imf10.hostedemail.com (Postfix) with ESMTP for ; Sat, 25 Apr 2020 09:45:13 +0000 (UTC) Received: by mail-wr1-f65.google.com with SMTP id x17so13677612wrt.5 for ; Sat, 25 Apr 2020 02:45:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=cAHJACUJQfFxkuI+j3PqcKGbaPPv4A6HH82Oo2FIodA=; b=WeeCWDqQymjTPUHum/OWYiNfhPBGaDCEX0TlQJYk/C7S0uUl4MgExVtbsbTm9mBiq6 6l5fHK+MDC2PbWUYG6XFrW/jDS/LH1R4Obidjow1ApHR7TRL0hGJRX2foTzjTe6yvVgv aPyuhPRQ5Bitw/A06yNXvmNs4cyMJu2HbAHvqHvbWZY8XLHi72pNsHBLe9/iHjGhfN2E tgwhDfcwQ9JLKzydrc1AdGAlF/oM+yaI7tn0ebGJyHN3zAgZ0isIo8hdJbrw6FEo5QdG DRverryP9JKFtkLHskBucGxr78t1wcy3e5/ABYIlgIMKQujxfexRw6pBq1gOtAXKFFqy naNg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=cAHJACUJQfFxkuI+j3PqcKGbaPPv4A6HH82Oo2FIodA=; b=kRtvnO7IoVoH046OkuoKe5KleNBTmjk8ngNDvCf+bJkbkNMQ0YU1P/WvvqrbsEkBSn /gjQtL5DeOeuYYcdLAeYncP0em4/dQuTvY2kBzkfl1HBbGI9VTFa82c1xq5uvm8sLsZZ Rph64Wju0bjk2wm9vJhE9lfVMaVnnJ2e10KNS/ZDT84yTvewdogn4Kht41MTQ37jHWm6 b3WxOLTxy8qHZMO8QDLYJ1LKedKisij+hehyll0TILLH625cCBowiRQGCt8Et577H6Cv BwSC4L/YJuDlE35lM2mQlCcFqsPa2eUCXtwDoHGCmLsITSIn13zgf4Ya3vmjHjKkOx4T Q+6g== X-Gm-Message-State: AGi0PubaRA6W8L+B3YruSsFXr+ZQ4CU3PtUCNOw2wtlKQhOW3EDGi5vT xAe3XzqRqFkVTgbqowdoT9YoGXrKg3und7wCdZ7pow== X-Google-Smtp-Source: APiQypKJaqmkcn/TYvnhOdjD4pKK3IbXIo9RDD19vizYw+ve7y8Ul4K/Jei9aCq8BPDKX/IQGVQpDt8ub49qpAHgGhc= X-Received: by 2002:a5d:6091:: with SMTP id w17mr15655869wrt.382.1587807911781; Sat, 25 Apr 2020 02:45:11 -0700 (PDT) MIME-Version: 1.0 References: <20200325161249.55095-1-glider@google.com> <20200325161249.55095-4-glider@google.com> <20200325161952.GF19542@dhcp22.suse.cz> <20200325183832.GI19542@dhcp22.suse.cz> In-Reply-To: From: Alexander Potapenko Date: Sat, 25 Apr 2020 11:45:00 +0200 Message-ID: Subject: Re: [PATCH v5 03/38] kmsan: gfp: introduce __GFP_NO_KMSAN_SHADOW To: Michal Hocko Cc: Vegard Nossum , Andrew Morton , Dmitry Vyukov , Marco Elver , Andrey Konovalov , Linux Memory Management List , Al Viro , Andreas Dilger , Andrey Ryabinin , Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , Christoph Hellwig , Christoph Hellwig , "Darrick J. Wong" , David Miller , Dmitry Torokhov , Eric Biggers , Eric Dumazet , Eric Van Hensbergen , Greg Kroah-Hartman , Harry Wentland , Herbert Xu , Ilya Leoshkevich , Ingo Molnar , Jason Wang , Jens Axboe , Marek Szyprowski , Mark Rutland , "Martin K . Petersen" , Martin Schwidefsky , Matthew Wilcox , "Michael S. Tsirkin" , Michal Simek , Petr Mladek , Qian Cai , Randy Dunlap , Robin Murphy , Sergey Senozhatsky , Steven Rostedt , Takashi Iwai , "Theodore Ts'o" , Thomas Gleixner , Vasily Gorbik , Wolfram Sang Content-Type: text/plain; charset="UTF-8" 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: > * - as mentioned in the cover letter, a lot of problems could've been > solved if we pre-allocate the metadata pages at boot time so that for > every two contiguous physical pages their metadata pages are also > contiguous. > I haven't come up with a good idea about how to implement that. > Suggestions are very welcome. I think I have a working solution now that doesn't require __GFP_NO_KMSAN_SHADOW. I'll drop this patch from the series.