* 4.19.5 and later has tons of false messages "BUG: non-zero pgtables_bytes on freeing mm: -16384"
@ 2018-12-27 9:13 Christian Borntraeger
2018-12-27 9:28 ` Christian Borntraeger
0 siblings, 1 reply; 5+ messages in thread
From: Christian Borntraeger @ 2018-12-27 9:13 UTC (permalink / raw)
To: Martin Schwidefsky, stable, linux-s390, linux-kernel
Cc: Sasha Levin, Greg Kroah-Hartman
Martin,
Right now you get a message
"BUG: non-zero pgtables_bytes on freeing mm: -16384"
for EVERY process that exits in 4.19.5 and later.
bisect points to
commit 4136161d676a93fc8df6bdb80d720c15522d6c24
Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Mon Oct 15 11:09:16 2018 +0200
s390/mm: fix mis-accounting of pgtable_bytes
[ Upstream commit e12e4044aede97974f2222eb7f0ed726a5179a32 ]
Turns out that this patch requires several dependencies so the autoselection of this
patch was missing that.
Can we either revert this patch or add the dependencies?
Christian
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: 4.19.5 and later has tons of false messages "BUG: non-zero pgtables_bytes on freeing mm: -16384"
2018-12-27 9:13 4.19.5 and later has tons of false messages "BUG: non-zero pgtables_bytes on freeing mm: -16384" Christian Borntraeger
@ 2018-12-27 9:28 ` Christian Borntraeger
2018-12-27 21:01 ` Sasha Levin
0 siblings, 1 reply; 5+ messages in thread
From: Christian Borntraeger @ 2018-12-27 9:28 UTC (permalink / raw)
To: Martin Schwidefsky, stable, linux-s390, linux-kernel
Cc: Sasha Levin, Greg Kroah-Hartman
On 27.12.2018 10:13, Christian Borntraeger wrote:
> Martin,
>
> Right now you get a message
> "BUG: non-zero pgtables_bytes on freeing mm: -16384"
> for EVERY process that exits in 4.19.5 and later.
>
> bisect points to
> commit 4136161d676a93fc8df6bdb80d720c15522d6c24
> Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
> Date: Mon Oct 15 11:09:16 2018 +0200
>
> s390/mm: fix mis-accounting of pgtable_bytes
>
> [ Upstream commit e12e4044aede97974f2222eb7f0ed726a5179a32 ]
>
> Turns out that this patch requires several dependencies so the autoselection of this
> patch was missing that.
>
> Can we either revert this patch or add the dependencies?
>
> Christian
>
It seems that adding
commit 6d212db11947ae5464e4717536ed9faf61c01e86 ("mm: add mm_pxd_folded checks to pgtable_bytes accounting functions")
fixes the issue.
Martin, do we need more?
Christian
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: 4.19.5 and later has tons of false messages "BUG: non-zero pgtables_bytes on freeing mm: -16384"
2018-12-27 9:28 ` Christian Borntraeger
@ 2018-12-27 21:01 ` Sasha Levin
2018-12-27 21:06 ` Christian Borntraeger
0 siblings, 1 reply; 5+ messages in thread
From: Sasha Levin @ 2018-12-27 21:01 UTC (permalink / raw)
To: Christian Borntraeger
Cc: Martin Schwidefsky, stable, linux-s390, linux-kernel, Greg Kroah-Hartman
On Thu, Dec 27, 2018 at 10:28:56AM +0100, Christian Borntraeger wrote:
>
>
>On 27.12.2018 10:13, Christian Borntraeger wrote:
>> Martin,
>>
>> Right now you get a message
>> "BUG: non-zero pgtables_bytes on freeing mm: -16384"
>> for EVERY process that exits in 4.19.5 and later.
>>
>> bisect points to
>> commit 4136161d676a93fc8df6bdb80d720c15522d6c24
>> Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
>> Date: Mon Oct 15 11:09:16 2018 +0200
>>
>> s390/mm: fix mis-accounting of pgtable_bytes
>>
>> [ Upstream commit e12e4044aede97974f2222eb7f0ed726a5179a32 ]
>>
>> Turns out that this patch requires several dependencies so the autoselection of this
>> patch was missing that.
>>
>> Can we either revert this patch or add the dependencies?
>>
>> Christian
>>
>
>It seems that adding
>
>commit 6d212db11947ae5464e4717536ed9faf61c01e86 ("mm: add mm_pxd_folded checks to pgtable_bytes accounting functions")
>fixes the issue.
I've queued 6d212db11947 for 4.19 for now, thank you.
--
Thanks,
Sasha
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: 4.19.5 and later has tons of false messages "BUG: non-zero pgtables_bytes on freeing mm: -16384"
2018-12-27 21:01 ` Sasha Levin
@ 2018-12-27 21:06 ` Christian Borntraeger
2018-12-27 22:52 ` Sasha Levin
0 siblings, 1 reply; 5+ messages in thread
From: Christian Borntraeger @ 2018-12-27 21:06 UTC (permalink / raw)
To: Sasha Levin
Cc: Martin Schwidefsky, stable, linux-s390, linux-kernel, Greg Kroah-Hartman
On 12/27/2018 10:01 PM, Sasha Levin wrote:
> On Thu, Dec 27, 2018 at 10:28:56AM +0100, Christian Borntraeger wrote:
>>
>>
>> On 27.12.2018 10:13, Christian Borntraeger wrote:
>>> Martin,
>>>
>>> Right now you get a message
>>> "BUG: non-zero pgtables_bytes on freeing mm: -16384"
>>> for EVERY process that exits in 4.19.5 and later.
>>>
>>> bisect points to
>>> commit 4136161d676a93fc8df6bdb80d720c15522d6c24
>>> Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
>>> Date: Mon Oct 15 11:09:16 2018 +0200
>>>
>>> s390/mm: fix mis-accounting of pgtable_bytes
>>>
>>> [ Upstream commit e12e4044aede97974f2222eb7f0ed726a5179a32 ]
>>>
>>> Turns out that this patch requires several dependencies so the autoselection of this
>>> patch was missing that.
>>>
>>> Can we either revert this patch or add the dependencies?
>>>
>>> Christian
>>>
>>
>> It seems that adding
>>
>> commit 6d212db11947ae5464e4717536ed9faf61c01e86 ("mm: add mm_pxd_folded checks to pgtable_bytes accounting functions")
>> fixes the issue.
>
> I've queued 6d212db11947 for 4.19 for now, thank you.
Not sure, but you might need
1071fc5779d98 mm: introduce mm_[p4d|pud|pmd]_folded
a8874e7e8a889 mm: make the __PAGETABLE_PxD_FOLDED defines non-empty
to avoid compile errors on !s390.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: 4.19.5 and later has tons of false messages "BUG: non-zero pgtables_bytes on freeing mm: -16384"
2018-12-27 21:06 ` Christian Borntraeger
@ 2018-12-27 22:52 ` Sasha Levin
0 siblings, 0 replies; 5+ messages in thread
From: Sasha Levin @ 2018-12-27 22:52 UTC (permalink / raw)
To: Christian Borntraeger
Cc: Martin Schwidefsky, stable, linux-s390, linux-kernel, Greg Kroah-Hartman
On Thu, Dec 27, 2018 at 10:06:09PM +0100, Christian Borntraeger wrote:
>
>
>On 12/27/2018 10:01 PM, Sasha Levin wrote:
>> On Thu, Dec 27, 2018 at 10:28:56AM +0100, Christian Borntraeger wrote:
>>>
>>>
>>> On 27.12.2018 10:13, Christian Borntraeger wrote:
>>>> Martin,
>>>>
>>>> Right now you get a message
>>>> "BUG: non-zero pgtables_bytes on freeing mm: -16384"
>>>> for EVERY process that exits in 4.19.5 and later.
>>>>
>>>> bisect points to
>>>> commit 4136161d676a93fc8df6bdb80d720c15522d6c24
>>>> Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
>>>> Date: Mon Oct 15 11:09:16 2018 +0200
>>>>
>>>> s390/mm: fix mis-accounting of pgtable_bytes
>>>>
>>>> [ Upstream commit e12e4044aede97974f2222eb7f0ed726a5179a32 ]
>>>>
>>>> Turns out that this patch requires several dependencies so the autoselection of this
>>>> patch was missing that.
>>>>
>>>> Can we either revert this patch or add the dependencies?
>>>>
>>>> Christian
>>>>
>>>
>>> It seems that adding
>>>
>>> commit 6d212db11947ae5464e4717536ed9faf61c01e86 ("mm: add mm_pxd_folded checks to pgtable_bytes accounting functions")
>>> fixes the issue.
>>
>> I've queued 6d212db11947 for 4.19 for now, thank you.
>
>Not sure, but you might need
>1071fc5779d98 mm: introduce mm_[p4d|pud|pmd]_folded
>a8874e7e8a889 mm: make the __PAGETABLE_PxD_FOLDED defines non-empty
>
>to avoid compile errors on !s390.
Queued those for 4.19 as well, build looks clean.
--
Thanks,
Sasha
^ permalink raw reply [flat|nested] 5+ messages in thread
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2018-12-27 9:13 4.19.5 and later has tons of false messages "BUG: non-zero pgtables_bytes on freeing mm: -16384" Christian Borntraeger
2018-12-27 9:28 ` Christian Borntraeger
2018-12-27 21:01 ` Sasha Levin
2018-12-27 21:06 ` Christian Borntraeger
2018-12-27 22:52 ` Sasha Levin
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