On Sat, 5 Jan 2019, Linus Torvalds wrote:
> > I am still not completely sure what to return in such cases though; we can
> > either blatantly lie and always pretend that the pages are resident
>
> That's what my untested patch did. Or maybe just claim they are all
> not present?
Thinking about i
[ Crossed emails ]
On Sat, Jan 5, 2019 at 12:12 PM Jiri Kosina wrote:
>
> I am still not completely sure what to return in such cases though; we can
> either blatantly lie and always pretend that the pages are resident
That's what my untested patch did. Or maybe just claim they are all
not prese
On Sat, Jan 5, 2019 at 11:46 AM Linus Torvalds
wrote:
>
> Can we please just limit it to vma's that are either anonymous, or map
> a file that the user actually owns?
.. or slightly simpler: a file that the user opened for writing.
IOW, some (TOTALLY UNTESTED!) patch like this?
L
On Sat, 5 Jan 2019, Linus Torvalds wrote:
> > There are possibilities [1] how mincore() could be used as a converyor of
> > a sidechannel information about pagecache metadata.
>
> Can we please just limit it to vma's that are either anonymous, or map
> a file that the user actually owns?
>
> The
Hi Jiri,
I love your patch! Yet something to improve:
[auto build test ERROR on linus/master]
[also build test ERROR on v4.20 next-20190103]
[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/commits/Jiri-
On Sat, Jan 5, 2019 at 9:27 AM Jiri Kosina wrote:
>
> From: Jiri Kosina
>
> There are possibilities [1] how mincore() could be used as a converyor of
> a sidechannel information about pagecache metadata.
Can we please just limit it to vma's that are either anonymous, or map
a file that the user
Hi Jiri,
I love your patch! Yet something to improve:
[auto build test ERROR on linus/master]
[also build test ERROR on v4.20 next-20190103]
[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/commits/Jiri-
On 5.1.2019 20:24, Jiri Kosina wrote:
> On Sat, 5 Jan 2019, Vlastimil Babka wrote:
>
>>> There are possibilities [1] how mincore() could be used as a converyor of
>>> a sidechannel information about pagecache metadata.
>>>
>>> Provide vm.mincore_privileged sysctl, which makes it possible to minco
On Sat, 5 Jan 2019, Vlastimil Babka wrote:
> > There are possibilities [1] how mincore() could be used as a converyor of
> > a sidechannel information about pagecache metadata.
> >
> > Provide vm.mincore_privileged sysctl, which makes it possible to mincore()
> > start returning -EPERM in case
On 5.1.2019 18:27, Jiri Kosina wrote:
> From: Jiri Kosina
>
> There are possibilities [1] how mincore() could be used as a converyor of
> a sidechannel information about pagecache metadata.
>
> Provide vm.mincore_privileged sysctl, which makes it possible to mincore()
> start returning -EPERM
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