On 06/20/2018 07:00 AM, Michal Hocko wrote:
> On Fri 15-06-18 15:36:07, Jason Baron wrote:
>>
>>
>> On 06/13/2018 03:15 AM, Michal Hocko wrote:
>>> On Wed 13-06-18 08:32:19, Vlastimil Babka wrote:
> [...]
BTW I didn't get why we should allow this for MADV_DONTNEED but not
MADV_FREE. Ca
On Fri 15-06-18 15:36:07, Jason Baron wrote:
>
>
> On 06/13/2018 03:15 AM, Michal Hocko wrote:
> > On Wed 13-06-18 08:32:19, Vlastimil Babka wrote:
[...]
> >> BTW I didn't get why we should allow this for MADV_DONTNEED but not
> >> MADV_FREE. Can you expand on that?
> >
> > Well, I wanted to bri
On 06/13/2018 03:15 AM, Michal Hocko wrote:
> On Wed 13-06-18 08:32:19, Vlastimil Babka wrote:
>> On 06/12/2018 04:11 PM, Jason Baron wrote:
>>>
>>>
>>> On 06/12/2018 03:46 AM, Michal Hocko wrote:
On Mon 11-06-18 12:23:58, Jason Baron wrote:
> On 06/11/2018 11:03 AM, Michal Hocko wrote:
On 06/13/2018 05:13 AM, Michal Hocko wrote:
> On Tue 12-06-18 10:11:33, Jason Baron wrote:
> [...]
>> Ok, I share the concern that there is a chance that userspace is relying
>> on MADV_DONTNEED not free'ing locked memory. In that case, what if we
>> introduce a MADV_DONTNEED_FORCE, which does e
On Tue 12-06-18 10:11:33, Jason Baron wrote:
[...]
> Ok, I share the concern that there is a chance that userspace is relying
> on MADV_DONTNEED not free'ing locked memory. In that case, what if we
> introduce a MADV_DONTNEED_FORCE, which does everything that
> MADV_DONTNEED currently does but in a
On Wed 13-06-18 09:51:23, Vlastimil Babka wrote:
> On 06/13/2018 09:15 AM, Michal Hocko wrote:
> > On Wed 13-06-18 08:32:19, Vlastimil Babka wrote:
[...]
> >> I think more concerning than guaranteeing no later major fault is
> >> possible data loss, e.g. replacing data with zero-filled pages.
> >
On 06/13/2018 09:15 AM, Michal Hocko wrote:
> On Wed 13-06-18 08:32:19, Vlastimil Babka wrote:
>> On 06/12/2018 04:11 PM, Jason Baron wrote:
>>>
>>>
>>> On 06/12/2018 03:46 AM, Michal Hocko wrote:
On Mon 11-06-18 12:23:58, Jason Baron wrote:
> On 06/11/2018 11:03 AM, Michal Hocko wrote:
>>
On Wed 13-06-18 08:32:19, Vlastimil Babka wrote:
> On 06/12/2018 04:11 PM, Jason Baron wrote:
> >
> >
> > On 06/12/2018 03:46 AM, Michal Hocko wrote:
> >> On Mon 11-06-18 12:23:58, Jason Baron wrote:
> >>> On 06/11/2018 11:03 AM, Michal Hocko wrote:
> So can we start discussing whether we wa
On 06/12/2018 04:11 PM, Jason Baron wrote:
>
>
> On 06/12/2018 03:46 AM, Michal Hocko wrote:
>> On Mon 11-06-18 12:23:58, Jason Baron wrote:
>>> On 06/11/2018 11:03 AM, Michal Hocko wrote:
So can we start discussing whether we want to allow MADV_DONTNEED on
mlocked areas and what downsi
On 06/12/2018 03:46 AM, Michal Hocko wrote:
> On Mon 11-06-18 12:23:58, Jason Baron wrote:
>> On 06/11/2018 11:03 AM, Michal Hocko wrote:
>>> So can we start discussing whether we want to allow MADV_DONTNEED on
>>> mlocked areas and what downsides it might have? Sure it would turn the
>>> strong
On Mon 11-06-18 12:23:58, Jason Baron wrote:
> On 06/11/2018 11:03 AM, Michal Hocko wrote:
> > So can we start discussing whether we want to allow MADV_DONTNEED on
> > mlocked areas and what downsides it might have? Sure it would turn the
> > strong mlock guarantee to have the whole vma resident bu
On 06/11/2018 11:03 AM, Michal Hocko wrote:
> On Mon 11-06-18 10:51:44, Jason Baron wrote:
>> On 06/11/2018 03:20 AM, Michal Hocko wrote:
>>> [CCing linux-api - please make sure to CC this mailing list anytime you
>>> are touching user visible apis]
>>>
>>> On Fri 08-06-18 14:56:52, Jason Baron
On 06/11/2018 03:20 AM, Michal Hocko wrote:
> [CCing linux-api - please make sure to CC this mailing list anytime you
> are touching user visible apis]
>
> On Fri 08-06-18 14:56:52, Jason Baron wrote:
>> In order to free memory that is marked MLOCK_ONFAULT, the memory region
>> needs to be first
On Mon 11-06-18 10:51:44, Jason Baron wrote:
> On 06/11/2018 03:20 AM, Michal Hocko wrote:
> > [CCing linux-api - please make sure to CC this mailing list anytime you
> > are touching user visible apis]
> >
> > On Fri 08-06-18 14:56:52, Jason Baron wrote:
> >> In order to free memory that is mark
[CCing linux-api - please make sure to CC this mailing list anytime you
are touching user visible apis]
On Fri 08-06-18 14:56:52, Jason Baron wrote:
> In order to free memory that is marked MLOCK_ONFAULT, the memory region
> needs to be first unlocked, before calling MADV_DONTNEED. And if the reg
Hi Jason,
I love your patch! Perhaps something to improve:
[auto build test WARNING on mmotm/master]
[also build test WARNING on v4.17 next-20180608]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system]
url:
https://github.com/0day-ci/linux/comm
On 06/08/2018 03:57 PM, Andrew Morton wrote:
> On Fri, 8 Jun 2018 14:56:52 -0400 Jason Baron wrote:
>
>> In order to free memory that is marked MLOCK_ONFAULT, the memory region
>> needs to be first unlocked, before calling MADV_DONTNEED. And if the region
>> is to be reused as MLOCK_ONFAULT, we
On Fri, 8 Jun 2018 14:56:52 -0400 Jason Baron wrote:
> In order to free memory that is marked MLOCK_ONFAULT, the memory region
> needs to be first unlocked, before calling MADV_DONTNEED. And if the region
> is to be reused as MLOCK_ONFAULT, we require another call to mlock2() with
> the MLOCK_ON
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