Message ID | 20200204013348.GxUmZtFO4%akpm@linux-foundation.org (mailing list archive) |
---|---|
State | New, archived |
Headers | show
Return-Path: <SRS0=xrrM=3Y=kvack.org=owner-linux-mm@kernel.org> Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 86AC113A4 for <patchwork-linux-mm@patchwork.kernel.org>; Tue, 4 Feb 2020 01:33:52 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4A26A21582 for <patchwork-linux-mm@patchwork.kernel.org>; Tue, 4 Feb 2020 01:33:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="UKm39DiS" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4A26A21582 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 73AF46B000A; Mon, 3 Feb 2020 20:33:51 -0500 (EST) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 6E9B46B000C; Mon, 3 Feb 2020 20:33:51 -0500 (EST) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5B2D26B000D; Mon, 3 Feb 2020 20:33:51 -0500 (EST) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0227.hostedemail.com [216.40.44.227]) by kanga.kvack.org (Postfix) with ESMTP id 422EE6B000A for <linux-mm@kvack.org>; Mon, 3 Feb 2020 20:33:51 -0500 (EST) Received: from smtpin27.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id CFC092816 for <linux-mm@kvack.org>; Tue, 4 Feb 2020 01:33:50 +0000 (UTC) X-FDA: 76450723020.27.song66_46fc345a7a54 X-Spam-Summary: 2,0,0,4d1d7ce02bed4a31,d41d8cd98f00b204,akpm@linux-foundation.org,:adobriyan@gmail.com:akpm@linux-foundation.org:bob.picco@oracle.com:dan.j.williams@intel.com:daniel.m.jordan@oracle.com:david@redhat.com::mhocko@kernel.org:mhocko@suse.com:mm-commits@vger.kernel.org:n-horiguchi@ah.jp.nec.com:osalvador@suse.de:pasha.tatashin@oracle.com:sfr@canb.auug.org.au:stable@vger.kernel.org:steven.sistare@oracle.com:torvalds@linux-foundation.org,RULES_HIT:2:41:355:379:800:960:967:973:988:989:1260:1263:1345:1359:1381:1431:1437:1535:1605:1730:1747:1777:1792:2194:2198:2199:2200:2393:2525:2559:2563:2682:2685:2693:2741:2859:2901:2902:2933:2937:2939:2942:2945:2947:2951:2954:3022:3138:3139:3140:3141:3142:3865:3866:3867:3868:3870:3871:3872:3874:3934:3936:3938:3941:3944:3947:3950:3953:3956:3959:4049:4118:4250:4321:4605:5007:6119:6238:6261:6653:6737:7514:7576:7875:7903:7904:7974:8599:8603:8660:8784:8957:9025:9163:9165:9545:10004:10913:11026:11473:11658:11914:12043:12048:12294:12296:12 297:1243 X-HE-Tag: song66_46fc345a7a54 X-Filterd-Recvd-Size: 7886 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf43.hostedemail.com (Postfix) with ESMTP for <linux-mm@kvack.org>; Tue, 4 Feb 2020 01:33:50 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (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 2EEEF2086A; Tue, 4 Feb 2020 01:33:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580780029; bh=RAqQCHcGG882aBwgMd4kEmG8ECKtW4l7nH+ZyDpPiQY=; h=Date:From:To:Subject:In-Reply-To:From; b=UKm39DiS6nc87wcQDClkfiAuVjXnoYl6k0DQmm4o9MvD5XMYCM5neP+CcaDmcoHkC qvfc73IWHo4/rJwny+N9K/RMs3LUhYZLE8xx956eRXo6gVAmTtgFNq1IwQ7mpheWTt QQQVU5EfQmyR6sIY+Nz+4l25FqeHz0qJtkOHbUKA= Date: Mon, 03 Feb 2020 17:33:48 -0800 From: Andrew Morton <akpm@linux-foundation.org> To: adobriyan@gmail.com, akpm@linux-foundation.org, bob.picco@oracle.com, dan.j.williams@intel.com, daniel.m.jordan@oracle.com, david@redhat.com, linux-mm@kvack.org, mhocko@kernel.org, mhocko@suse.com, mm-commits@vger.kernel.org, n-horiguchi@ah.jp.nec.com, osalvador@suse.de, pasha.tatashin@oracle.com, sfr@canb.auug.org.au, stable@vger.kernel.org, steven.sistare@oracle.com, torvalds@linux-foundation.org Subject: [patch 02/67] mm/page_alloc.c: fix uninitialized memmaps on a partially populated last section Message-ID: <20200204013348.GxUmZtFO4%akpm@linux-foundation.org> In-Reply-To: <20200203173311.6269a8be06a05e5a4aa08a93@linux-foundation.org> User-Agent: s-nail v14.8.16 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: <linux-mm.kvack.org> |
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[01/67] ocfs2: fix oops when writing cloned file
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--- a/mm/page_alloc.c~mm-fix-uninitialized-memmaps-on-a-partially-populated-last-section +++ a/mm/page_alloc.c @@ -6947,7 +6947,8 @@ static u64 zero_pfn_range(unsigned long * This function also addresses a similar issue where struct pages are left * uninitialized because the physical address range is not covered by * memblock.memory or memblock.reserved. That could happen when memblock - * layout is manually configured via memmap=. + * layout is manually configured via memmap=, or when the highest physical + * address (max_pfn) does not end on a section boundary. */ void __init zero_resv_unavail(void) { @@ -6965,7 +6966,16 @@ void __init zero_resv_unavail(void) pgcnt += zero_pfn_range(PFN_DOWN(next), PFN_UP(start)); next = end; } - pgcnt += zero_pfn_range(PFN_DOWN(next), max_pfn); + + /* + * Early sections always have a fully populated memmap for the whole + * section - see pfn_valid(). If the last section has holes at the + * end and that section is marked "online", the memmap will be + * considered initialized. Make sure that memmap has a well defined + * state. + */ + pgcnt += zero_pfn_range(PFN_DOWN(next), + round_up(max_pfn, PAGES_PER_SECTION)); /* * Struct pages that do not have backing memory. This could be because