From: Sasha Levin <sasha.levin@oracle.com>
To: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
Dave Jones <davej@redhat.com>,
LKML <linux-kernel@vger.kernel.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Rik van Riel <riel@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Cyrill Gorcunov <gorcunov@gmail.com>
Subject: Re: mm: BUG in unmap_page_range
Date: Thu, 04 Sep 2014 05:04:37 -0400 [thread overview]
Message-ID: <54082B25.9090600@oracle.com> (raw)
In-Reply-To: <540127AC.4040804@oracle.com>
On 08/29/2014 09:23 PM, Sasha Levin wrote:
> On 08/27/2014 11:26 AM, Mel Gorman wrote:
>> > diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
>> > index 281870f..ffea570 100644
>> > --- a/include/asm-generic/pgtable.h
>> > +++ b/include/asm-generic/pgtable.h
>> > @@ -723,6 +723,9 @@ static inline pte_t pte_mknuma(pte_t pte)
>> >
>> > VM_BUG_ON(!(val & _PAGE_PRESENT));
>> >
>> > + /* debugging only, specific to x86 */
>> > + VM_BUG_ON(val & _PAGE_PROTNONE);
>> > +
>> > val &= ~_PAGE_PRESENT;
>> > val |= _PAGE_NUMA;
> Triggered again, the first VM_BUG_ON got hit, the second one never did.
Okay, this bug has reproduced quite a few times since then that I no longer
suspect it's random memory corruption. I'd be happy to try out more debug
patches if you have any leads.
Thanks,
Sasha
WARNING: multiple messages have this Message-ID (diff)
From: Sasha Levin <sasha.levin@oracle.com>
To: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
Dave Jones <davej@redhat.com>,
LKML <linux-kernel@vger.kernel.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Rik van Riel <riel@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Cyrill Gorcunov <gorcunov@gmail.com>
Subject: Re: mm: BUG in unmap_page_range
Date: Thu, 04 Sep 2014 05:04:37 -0400 [thread overview]
Message-ID: <54082B25.9090600@oracle.com> (raw)
In-Reply-To: <540127AC.4040804@oracle.com>
On 08/29/2014 09:23 PM, Sasha Levin wrote:
> On 08/27/2014 11:26 AM, Mel Gorman wrote:
>> > diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
>> > index 281870f..ffea570 100644
>> > --- a/include/asm-generic/pgtable.h
>> > +++ b/include/asm-generic/pgtable.h
>> > @@ -723,6 +723,9 @@ static inline pte_t pte_mknuma(pte_t pte)
>> >
>> > VM_BUG_ON(!(val & _PAGE_PRESENT));
>> >
>> > + /* debugging only, specific to x86 */
>> > + VM_BUG_ON(val & _PAGE_PROTNONE);
>> > +
>> > val &= ~_PAGE_PRESENT;
>> > val |= _PAGE_NUMA;
> Triggered again, the first VM_BUG_ON got hit, the second one never did.
Okay, this bug has reproduced quite a few times since then that I no longer
suspect it's random memory corruption. I'd be happy to try out more debug
patches if you have any leads.
Thanks,
Sasha
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next prev parent reply other threads:[~2014-09-04 9:05 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-02 21:58 mm: BUG in unmap_page_range Sasha Levin
2014-08-02 21:58 ` Sasha Levin
2014-08-04 11:40 ` Hugh Dickins
2014-08-04 11:40 ` Hugh Dickins
2014-08-05 14:44 ` Mel Gorman
2014-08-05 14:44 ` Mel Gorman
2014-08-06 0:42 ` Hugh Dickins
2014-08-06 0:42 ` Hugh Dickins
2014-08-06 1:04 ` Sasha Levin
2014-08-06 1:04 ` Sasha Levin
2014-08-12 3:28 ` Sasha Levin
2014-08-12 3:28 ` Sasha Levin
2014-08-12 10:47 ` [PATCH] x86,mm: fix pte_special versus pte_numa Mel Gorman
2014-08-12 10:47 ` Mel Gorman
2014-08-12 11:08 ` [PATCH] mm: Remove misleading ARCH_USES_NUMA_PROT_NONE Mel Gorman
2014-08-12 11:08 ` Mel Gorman
2014-08-13 13:14 ` Aneesh Kumar K.V
2014-08-13 13:14 ` Aneesh Kumar K.V
2014-08-27 3:16 ` mm: BUG in unmap_page_range Sasha Levin
2014-08-27 3:16 ` Sasha Levin
2014-08-27 15:26 ` Mel Gorman
2014-08-27 15:26 ` Mel Gorman
2014-08-27 18:21 ` Sasha Levin
2014-08-27 18:21 ` Sasha Levin
2014-08-30 1:23 ` Sasha Levin
2014-08-30 1:23 ` Sasha Levin
2014-09-04 9:04 ` Sasha Levin [this message]
2014-09-04 9:04 ` Sasha Levin
2014-09-08 17:18 ` Mel Gorman
2014-09-08 17:18 ` Mel Gorman
2014-09-08 17:23 ` Sasha Levin
2014-09-08 17:56 ` Sasha Levin
2014-09-08 17:56 ` Sasha Levin
2014-09-09 21:33 ` Mel Gorman
2014-09-09 21:33 ` Mel Gorman
2014-09-09 22:20 ` Sasha Levin
2014-09-09 22:20 ` Sasha Levin
2014-09-10 2:45 ` Hugh Dickins
2014-09-10 2:45 ` Hugh Dickins
2014-09-10 12:47 ` Mel Gorman
2014-09-10 12:47 ` Mel Gorman
2014-09-10 14:24 ` Trinity and mbind flags (WAS: Re: mm: BUG in unmap_page_range) Sasha Levin
2014-09-10 14:24 ` Sasha Levin
2014-09-10 14:33 ` Dave Jones
2014-09-10 14:33 ` Dave Jones
2014-09-10 19:06 ` mm: BUG in unmap_page_range Sasha Levin
2014-09-10 19:06 ` Sasha Levin
2014-09-10 19:36 ` Hugh Dickins
2014-09-10 19:36 ` Hugh Dickins
2014-09-11 2:43 ` Sasha Levin
2014-09-11 2:43 ` Sasha Levin
2014-09-11 11:39 ` Hugh Dickins
2014-09-11 11:39 ` Hugh Dickins
2014-09-11 14:22 ` Sasha Levin
2014-09-11 14:22 ` Sasha Levin
2014-09-11 14:33 ` Dave Jones
2014-09-11 14:33 ` Dave Jones
2014-09-11 16:28 ` Mel Gorman
2014-09-11 16:28 ` Mel Gorman
2014-09-11 22:38 ` Sasha Levin
2014-09-11 22:38 ` Sasha Levin
2014-09-17 21:37 ` Sasha Levin
2014-09-17 21:37 ` Sasha Levin
2014-09-10 13:12 ` Sasha Levin
2014-09-10 13:12 ` Sasha Levin
2014-09-10 13:40 ` Mel Gorman
2014-09-10 13:40 ` Mel Gorman
2014-09-10 16:44 ` Sasha Levin
2014-09-10 16:44 ` Sasha Levin
2014-09-10 19:09 ` Hugh Dickins
2014-09-10 19:09 ` Hugh Dickins
2014-09-10 20:36 ` Sasha Levin
2014-09-10 20:36 ` Sasha Levin
2014-09-10 23:00 ` Hugh Dickins
2014-09-10 23:00 ` Hugh Dickins
2014-08-06 10:35 ` Mel Gorman
2014-08-06 10:35 ` Mel Gorman
2014-08-06 7:14 ` Aneesh Kumar K.V
2014-08-06 7:14 ` Aneesh Kumar K.V
2014-08-06 7:14 ` Aneesh Kumar K.V
2014-08-06 10:23 ` Mel Gorman
2014-08-06 10:23 ` Mel Gorman
2014-08-06 10:23 ` Mel Gorman
2014-08-07 8:40 ` Aneesh Kumar K.V
2014-08-07 8:40 ` Aneesh Kumar K.V
2014-08-07 8:40 ` Aneesh Kumar K.V
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