From: Stephen Rothwell <sfr@canb.auug.org.au>
To: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: Matthew Wilcox <willy@infradead.org>,
linux-mm <linux-mm@kvack.org>,
Linux-Next Mailing List <linux-next@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>,
lkft-triage@lists.linaro.org,
Andrew Morton <akpm@linux-foundation.org>,
LTP List <ltp@lists.linux.it>, Arnd Bergmann <arnd@arndb.de>,
Russell King - ARM Linux <linux@armlinux.org.uk>,
Mike Rapoport <rppt@linux.ibm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Christoph Hellwig <hch@lst.de>, Andy Lutomirski <luto@kernel.org>,
Peter Xu <peterx@redhat.com>,
opendmb@gmail.com, Linus Walleij <linus.walleij@linaro.org>,
afzal.mohd.ma@gmail.com, Will Deacon <will@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: Re: BUG: Bad page state in process true pfn:a8fed on arm
Date: Tue, 25 Aug 2020 17:44:10 +1000 [thread overview]
Message-ID: <20200825174410.1af823db@canb.auug.org.au> (raw)
In-Reply-To: <CA+G9fYvjKGF3HZXyd=JQHzRG=r=bmD0hYQn02VL4Y=5y57OgaA@mail.gmail.com>
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Hi all,
On Tue, 25 Aug 2020 13:03:53 +0530 Naresh Kamboju <naresh.kamboju@linaro.org> wrote:
>
> On Mon, 24 Aug 2020 at 16:36, Matthew Wilcox <willy@infradead.org> wrote:
> >
> > On Mon, Aug 24, 2020 at 03:14:55PM +0530, Naresh Kamboju wrote:
> > > [ 67.545247] BUG: Bad page state in process true pfn:a8fed
> > > [ 67.550767] page:9640c0ab refcount:0 mapcount:-1024
> >
> > Somebody freed a page table without calling __ClearPageTable() on it.
>
> After running git bisect on this problem,
> The first suspecting of this problem on arm architecture this patch.
> 424efe723f7717430bec7c93b4d28bba73e31cf6
> ("mm: account PMD tables like PTE tables ")
>
> Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
> Reported-by: Anders Roxell <anders.roxell@linaro.org>
>
> Additional information:
> We have tested linux next by reverting this patch and confirmed
> that the reported BUG is not reproduced.
>
> These configs enabled on the running device,
>
> CONFIG_TRANSPARENT_HUGEPAGE=y
> CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
>
>
> -- Suspecting patch --
> commit 424efe723f7717430bec7c93b4d28bba73e31cf6
> Author: Matthew Wilcox <willy@infradead.org>
> Date: Thu Aug 20 10:01:30 2020 +1000
>
> mm: account PMD tables like PTE tables
OK, I have reverted that patch from todays' linux-next.
--
Cheers,
Stephen Rothwell
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next prev parent reply other threads:[~2020-08-25 7:44 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-24 9:44 BUG: Bad page state in process true pfn:a8fed on arm Naresh Kamboju
2020-08-24 10:16 ` Naresh Kamboju
2020-08-24 11:06 ` Matthew Wilcox
2020-08-25 7:33 ` Naresh Kamboju
2020-08-25 7:44 ` Stephen Rothwell [this message]
2020-08-25 8:31 ` Mike Rapoport
2020-08-25 8:53 ` Anders Roxell
2020-08-25 11:13 ` [PATCH] arm: __pmd_free_tlb(): call page table desctructor (Was: BUG: Bad page state in process true pfn:a8fed on arm) Mike Rapoport
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