From: Will Deacon <will.deacon@arm.com>
To: Sebastian Ott <sebott@linux.vnet.ibm.com>
Cc: linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org,
Catalin Marinas <catalin.marinas@arm.com>,
Gerald Schaefer <gerald.schaefer@de.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
linuxppc-dev@lists.ozlabs.org,
Heiko Carstens <heiko.carstens@de.ibm.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Paul Mackerras <paulus@samba.org>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: Re: [BUG] random kernel crashes after THP rework on s390 (maybe also on PowerPC and ARM)
Date: Fri, 12 Feb 2016 15:52:22 +0000 [thread overview]
Message-ID: <20160212155221.GP25087@arm.com> (raw)
In-Reply-To: <alpine.LFD.2.20.1602121106140.1773@schleppi>
On Fri, Feb 12, 2016 at 11:12:34AM +0100, Sebastian Ott wrote:
> On Fri, 12 Feb 2016, Will Deacon wrote:
> > On Thu, Feb 11, 2016 at 08:57:02PM +0100, Gerald Schaefer wrote:
> > > On Thu, 11 Feb 2016 21:09:42 +0200
> > > "Kirill A. Shutemov" <kirill@shutemov.name> wrote:
> > > > On Thu, Feb 11, 2016 at 07:22:23PM +0100, Gerald Schaefer wrote:
> > > > > Sebastian Ott reported random kernel crashes beginning with v4.5-rc1 and
> > > > > he also bisected this to commit 61f5d698 "mm: re-enable THP". Further
> > > > > review of the THP rework patches, which cannot be bisected, revealed
> > > > > commit fecffad "s390, thp: remove infrastructure for handling splitting PMDs"
> > > > > (and also similar commits for other archs).
[...]
> > Do you have a reliable way to trigger the "random kernel crashes"? We've not
> > seen anything reported on arm64, but I don't see why we wouldn't be affected
> > by the same bug and it would be good to confirm and validate a fix.
>
> My testcase was compiling the kernel. Most of the time my test system
> didn't survive a single compile run. During bisect I did at least 20
> compile runs to flag a commit as good.
I've been building kernels all day with -rc3 on my arm64 box and haven't
seen any problems yet.. :/.
I'll leave it going over the weekend.
Will
next prev parent reply other threads:[~2016-02-12 15:52 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-11 18:22 [BUG] random kernel crashes after THP rework on s390 (maybe also on PowerPC and ARM) Gerald Schaefer
2016-02-11 19:09 ` Kirill A. Shutemov
2016-02-11 19:12 ` Kirill A. Shutemov
2016-02-12 12:21 ` Sebastian Ott
2016-02-11 19:57 ` Gerald Schaefer
2016-02-12 4:04 ` Aneesh Kumar K.V
2016-02-12 11:59 ` Gerald Schaefer
2016-02-12 16:17 ` Aneesh Kumar K.V
2016-02-12 10:01 ` Will Deacon
2016-02-12 10:12 ` Sebastian Ott
2016-02-12 15:52 ` Will Deacon [this message]
2016-02-12 15:41 ` Kirill A. Shutemov
2016-02-12 15:57 ` Christian Borntraeger
2016-02-12 17:16 ` Gerald Schaefer
2016-02-12 23:15 ` Kirill A. Shutemov
2016-02-13 11:58 ` Sebastian Ott
2016-02-15 11:31 ` Kirill A. Shutemov
2016-02-15 16:38 ` Sebastian Ott
2016-02-15 18:37 ` Gerald Schaefer
2016-02-15 21:35 ` Kirill A. Shutemov
2016-02-16 9:54 ` Sebastian Ott
2016-02-16 16:24 ` Gerald Schaefer
2016-02-17 15:04 ` Kirill A. Shutemov
2016-02-17 19:04 ` Sebastian Ott
2016-02-16 18:46 ` Christian Borntraeger
2016-02-17 19:13 ` Gerald Schaefer
2016-02-17 23:58 ` Kirill A. Shutemov
2016-02-18 15:00 ` Gerald Schaefer
2016-02-18 17:06 ` Kirill A. Shutemov
2016-02-19 14:15 ` Sebastian Ott
2016-02-15 16:41 ` Gerald Schaefer
2016-02-23 10:32 ` Kirill A. Shutemov
2016-02-23 17:46 ` Linus Torvalds
2016-02-23 18:19 ` Gerald Schaefer
2016-02-23 18:47 ` Will Deacon
2016-02-25 15:49 ` Steve Capper
2016-02-25 16:01 ` Kirill A. Shutemov
2016-02-25 16:08 ` Steve Capper
2016-02-23 19:33 ` Kirill A. Shutemov
2016-02-23 20:22 ` Will Deacon
2016-02-24 10:16 ` Christian Borntraeger
2016-02-24 10:41 ` Will Deacon
2016-02-24 10:51 ` Christian Borntraeger
2016-02-24 11:02 ` Will Deacon
2016-02-24 17:22 ` Aneesh Kumar K.V
2016-02-24 8:39 ` Martin Schwidefsky
2016-02-24 12:11 ` Sebastian Ott
2016-02-24 16:44 ` Gerald Schaefer
2016-02-24 8:22 ` Martin Schwidefsky
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