> > As this patch is dependent on PageReserved patch(which is in progress),
> > just
> > wondering if we are able to test the code path for hugepage with DAX.
>
> For testing, I used the following patch. It's not 100%, since it
> intercepts at kvm_is_reserved_pfn(), and not PageReserved()
KVM has a use case for determining the size of a dax mapping. The KVM
code has easy access to the address and the mm; hence the change in
parameters.
Signed-off-by: Barret Rhoden
Reviewed-by: David Hildenbrand
---
include/linux/mm.h | 3 +++
mm/memory-failure.c | 38
This change allows KVM to map DAX-backed files made of huge pages with
huge mappings in the EPT/TDP.
DAX pages are not PageTransCompound. The existing check is trying to
determine if the mapping for the pfn is a huge mapping or not. For
non-DAX maps, e.g. hugetlbfs, that means checking
This patch series depends on dax pages not being PageReserved. Once
that is in place, these changes will let KVM use huge pages with
dax-backed files. Without the PageReserved change, KVM and DAX still
work with these patches, simply without huge pages - which is the
current situation.
kvm_is_reserved_pfn() already checks PageReserved().
Signed-off-by: Barret Rhoden
---
virt/kvm/kvm_main.c | 8 ++--
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 2679e476b6c3..e0ea6d7dac14 100644
--- a/virt/kvm/kvm_main.c
+++
On 11/14/2018 7:07 AM, Michal Hocko wrote:
On Mon 05-11-18 13:19:25, Alexander Duyck wrote:
This patchset is essentially a refactor of the page initialization logic
that is meant to provide for better code reuse while providing a
significant improvement in deferred page initialization
[ add Alex who is looking into removing PageReserved for DAX pages. ]
On Wed, Nov 14, 2018 at 1:53 PM Barret Rhoden wrote:
>
> This patch series depends on dax pages not being PageReserved. Once
> that is in place, these changes will let KVM use huge pages with
> dax-backed files. Without the
On Wed, Nov 14, 2018 at 04:50:23PM -0800, Alexander Duyck wrote:
>
>
> On 11/14/2018 7:07 AM, Michal Hocko wrote:
> >On Mon 05-11-18 13:19:25, Alexander Duyck wrote:
> >>This patchset is essentially a refactor of the page initialization logic
> >>that is meant to provide for better code reuse
On Wed, 14 Nov 2018, Dan Williams wrote:
> As presented at the 2018 Linux Plumbers conference [1], the Subsystem
> Profile is proposed as a way to reduce friction between committers and
> maintainers and perhaps encourage conversations amongst maintainers
> about best practice policies.
>
> The
Em Wed, 14 Nov 2018 20:53:25 -0800
Dan Williams escreveu:
> As presented at the 2018 Linux Plumbers conference [1], the Subsystem
> Profile is proposed as a way to reduce friction between committers and
> maintainers and perhaps encourage conversations amongst maintainers
> about best practice
Em Wed, 14 Nov 2018 20:53:19 -0800
Dan Williams escreveu:
> Fixup some P: entries to be M: and rename the remaining ones to 'E:' for
> "entity". The P: tag will be used to indicate the location of a
> Subsystem Profile for a given MAINTAINERS entry.
>
> Cc: Joe Perches
> Signed-off-by: Dan
As presented at the 2018 Linux Plumbers conference [1], the Subsystem
Profile is proposed as a way to reduce friction between committers and
maintainers and perhaps encourage conversations amongst maintainers
about best practice policies.
The profile contains short answers to some of the common
Fixup some P: entries to be M: and rename the remaining ones to 'E:' for
"entity". The P: tag will be used to indicate the location of a
Subsystem Profile for a given MAINTAINERS entry.
Cc: Joe Perches
Signed-off-by: Dan Williams
---
MAINTAINERS | 18 +-
1 file changed, 9
Document the basic policies of the libnvdimm subsystem and provide a
first example of a Subsystem Profile for others to duplicate and edit.
Cc: Ross Zwisler
Cc: Vishal Verma
Cc: Dave Jiang
Signed-off-by: Dan Williams
---
Documentation/nvdimm/subsystem-profile.rst | 86
At a recently concluded session at the Linux Plumbers Conference I
proposed a "Subsystem Profile" as a document that a maintainer can
provide to set contributor expectations and provide fodder for a
discussion between maintainers about the merits of different maintainer
policies.
For those that
Em Wed, 14 Nov 2018 20:53:13 -0800
Dan Williams escreveu:
> At a recently concluded session at the Linux Plumbers Conference I
> proposed a "Subsystem Profile" as a document that a maintainer can
> provide to set contributor expectations and provide fodder for a
> discussion between maintainers
Hi Dan,
On Thu, Nov 15, 2018 at 6:05 AM Dan Williams wrote:
> As presented at the 2018 Linux Plumbers conference [1], the Subsystem
> Profile is proposed as a way to reduce friction between committers and
> maintainers and perhaps encourage conversations amongst maintainers
> about best practice
On Mon 05-11-18 13:19:25, Alexander Duyck wrote:
> This patchset is essentially a refactor of the page initialization logic
> that is meant to provide for better code reuse while providing a
> significant improvement in deferred page initialization performance.
>
> In my testing on an x86_64
On 18-11-14 16:07:42, Michal Hocko wrote:
> On Mon 05-11-18 13:19:25, Alexander Duyck wrote:
> > This patchset is essentially a refactor of the page initialization logic
> > that is meant to provide for better code reuse while providing a
> > significant improvement in deferred page initialization
On Wed 14-11-18 19:12:53, Pavel Tatashin wrote:
> On 18-11-14 16:07:42, Michal Hocko wrote:
> > On Mon 05-11-18 13:19:25, Alexander Duyck wrote:
> > > This patchset is essentially a refactor of the page initialization logic
> > > that is meant to provide for better code reuse while providing a
> >
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