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[46.22.139.230]) by mx.google.com with ESMTPS id i7si1843797edg.251.2019.03.17.08.22.06 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 17 Mar 2019 08:22:06 -0700 (PDT) Received-SPF: pass (google.com: domain of mgorman@techsingularity.net designates 46.22.139.230 as permitted sender) client-ip=46.22.139.230; Authentication-Results: mx.google.com; spf=pass (google.com: domain of mgorman@techsingularity.net designates 46.22.139.230 as permitted sender) smtp.mailfrom=mgorman@techsingularity.net Received: from mail.blacknight.com (unknown [81.17.254.17]) by outbound-smtp13.blacknight.com (Postfix) with ESMTPS id 273591C2519 for ; Sun, 17 Mar 2019 15:22:06 +0000 (GMT) Received: (qmail 24889 invoked from network); 17 Mar 2019 15:22:06 -0000 Received: from unknown (HELO techsingularity.net) (mgorman@techsingularity.net@[37.228.225.79]) by 81.17.254.9 with ESMTPSA (AES256-SHA encrypted, authenticated); 17 Mar 2019 15:22:06 -0000 Date: Sun, 17 Mar 2019 15:22:04 +0000 From: Mel Gorman To: Daniel Jordan Cc: Mikhail Gavrilov , linux-mm@kvack.org, cai@lca.pw, vbabka@suse.cz Subject: Re: kernel BUG at include/linux/mm.h:1020! Message-ID: <20190317152204.GD3189@techsingularity.net> References: <20190315205826.fgbelqkyuuayevun@ca-dmjordan1.us.oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <20190315205826.fgbelqkyuuayevun@ca-dmjordan1.us.oracle.com> User-Agent: Mutt/1.10.1 (2018-07-13) 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 Fri, Mar 15, 2019 at 04:58:27PM -0400, Daniel Jordan wrote: > On Tue, Mar 12, 2019 at 10:55:27PM +0500, Mikhail Gavrilov wrote: > > Hi folks. > > I am observed kernel panic after updated to git commit 610cd4eadec4. > > I am did not make git bisect because this crashes occurs spontaneously > > and I not have exactly instruction how reproduce it. > > > > Hope backtrace below could help understand how fix it: > > > > page:ffffef46607ce000 is uninitialized and poisoned > > raw: ffffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffff > > raw: ffffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffff > > page dumped because: VM_BUG_ON_PAGE(PagePoisoned(p)) > > ------------[ cut here ]------------ > > kernel BUG at include/linux/mm.h:1020! > > invalid opcode: 0000 [#1] SMP NOPTI > > CPU: 1 PID: 118 Comm: kswapd0 Tainted: G C > > 5.1.0-0.rc0.git4.1.fc31.x86_64 #1 > > Hardware name: System manufacturer System Product Name/ROG STRIX > > X470-I GAMING, BIOS 1201 12/07/2018 > > RIP: 0010:__reset_isolation_pfn+0x244/0x2b0 > > This is new code, from e332f741a8dd1 ("mm, compaction: be selective about what > pageblocks to clear skip hints"), so I added some folks. > I'm travelling at the moment and only online intermittently but I think it's worth noting that the check being tripped is during a call to page_zone() that also happened before the patch was merged too. I don't think it's a new check as such. I haven't been able to isolate a source of corruption in the series yet and suspected in at least one case that there is another source of corruption that is causing unrelated subsystems to trip over. -- Mel Gorman SUSE Labs