On Tue, 22 Jul 2014, Sasha Levin wrote:
> On 07/22/2014 04:07 AM, Hugh Dickins wrote:
> > But there is one easy change which might do it: please would you try
> > changing the TASK_KILLABLE a few lines above to TASK_UNINTERRUPTIBLE.
>
> That seems to have done the trick, everything works fine.
Su
On 07/22/2014 04:07 AM, Hugh Dickins wrote:
> But there is one easy change which might do it: please would you try
> changing the TASK_KILLABLE a few lines above to TASK_UNINTERRUPTIBLE.
That seems to have done the trick, everything works fine.
Thanks,
Sasha
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On Tue, 22 Jul 2014, Vlastimil Babka wrote:
> On 07/22/2014 12:06 PM, Vlastimil Babka wrote:
> > So if this is true, the change to TASK_UNINTERRUPTIBLE will avoid the
> > problem, but it would be nicer to keep the KILLABLE state.
> > I think it could be done by testing if the wait queue still exist
On 07/22/2014 12:06 PM, Vlastimil Babka wrote:
So if this is true, the change to TASK_UNINTERRUPTIBLE will avoid the
problem, but it would be nicer to keep the KILLABLE state.
I think it could be done by testing if the wait queue still exists and
is the same, before attempting finish wait. If it
On 07/22/2014 10:07 AM, Hugh Dickins wrote:
On Mon, 21 Jul 2014, Sasha Levin wrote:
On 07/19/2014 07:44 PM, Hugh Dickins wrote:
Otherwise, I've been unable to reproduce the shmem_fallocate hang.
Great. Andrew, I think we can say that it's now safe to send
1/2 shmem: fix faulting into a hole,
On Mon, 21 Jul 2014, Sasha Levin wrote:
> On 07/19/2014 07:44 PM, Hugh Dickins wrote:
> >> Otherwise, I've been unable to reproduce the shmem_fallocate hang.
> > Great. Andrew, I think we can say that it's now safe to send
> > 1/2 shmem: fix faulting into a hole, not taking i_mutex
> > 2/2 shmem:
On 07/19/2014 07:44 PM, Hugh Dickins wrote:
>> Otherwise, I've been unable to reproduce the shmem_fallocate hang.
> Great. Andrew, I think we can say that it's now safe to send
> 1/2 shmem: fix faulting into a hole, not taking i_mutex
> 2/2 shmem: fix splicing from a hole while it's punched
> on t
On Fri, 18 Jul 2014, Sasha Levin wrote:
> On 07/17/2014 12:12 PM, Sasha Levin wrote:
> > On 07/17/2014 12:10 PM, Vlastimil Babka wrote:
> >> > On 07/15/2014 12:28 PM, Hugh Dickins wrote:
> >>> >> In the end I decided that we had better look at it as two problems,
> >>> >> the trinity faulting starv
On 07/17/2014 12:12 PM, Sasha Levin wrote:
> On 07/17/2014 12:10 PM, Vlastimil Babka wrote:
>> > On 07/15/2014 12:28 PM, Hugh Dickins wrote:
>>> >> In the end I decided that we had better look at it as two problems,
>>> >> the trinity faulting starvation, and the indefinite punching loop,
>>> >> so
On 07/18/2014 01:34 AM, Hugh Dickins wrote:
> On Thu, 17 Jul 2014, Vlastimil Babka wrote:
>> On 07/15/2014 12:28 PM, Hugh Dickins wrote:
>> > In the end I decided that we had better look at it as two problems,
>> > the trinity faulting starvation, and the indefinite punching loop,
>> > so 1/2 and 2
On Thu, 17 Jul 2014, Vlastimil Babka wrote:
> On 07/15/2014 12:28 PM, Hugh Dickins wrote:
> > In the end I decided that we had better look at it as two problems,
> > the trinity faulting starvation, and the indefinite punching loop,
> > so 1/2 and 2/2 present both solutions: belt and braces.
>
> I
On 07/17/2014 12:10 PM, Vlastimil Babka wrote:
> On 07/15/2014 12:28 PM, Hugh Dickins wrote:
>> In the end I decided that we had better look at it as two problems,
>> the trinity faulting starvation, and the indefinite punching loop,
>> so 1/2 and 2/2 present both solutions: belt and braces.
>
> I
On 07/15/2014 12:28 PM, Hugh Dickins wrote:
In the end I decided that we had better look at it as two problems,
the trinity faulting starvation, and the indefinite punching loop,
so 1/2 and 2/2 present both solutions: belt and braces.
I tested that with my reproducer and it was OK, but as I alr
Hi Andrew,
Here's my latest and hopefully last stab at fixing the trinity
hole-punch starvation issue that became known as CVE-2014-4171.
You may prefer to hear a testing update from Sasha and Vlastimil before
paying any attention to these, or you may prefer to add them into mmotm
for wider testi
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