Hello.
On pondělí 9. října 2023 4:49:25 CEST Meng Li wrote:
> Hi all:
>
> The core frequency is subjected to the process variation in semiconductors.
> Not all cores are able to reach the maximum frequency respecting the
> infrastructure limits. Consequently, AMD has redefined the concept of
> ma
Add a test for new UFFDIO_MOVE ioctl which uses uffd to move source
into destination buffer while checking the contents of both after
remapping. After the operation the content of the destination buffer
should match the original source buffer's content while the source
buffer should be zeroed.
Sig
From: Andrea Arcangeli
Implement the uABI of UFFDIO_MOVE ioctl.
UFFDIO_COPY performs ~20% better than UFFDIO_MOVE when the application
needs pages to be allocated [1]. However, with UFFDIO_MOVE, if pages are
available (in userspace) for recycling, as is usually the case in heap
compaction algorit
This patch series introduces UFFDIO_MOVE feature to userfaultfd, which
has long been implemented and maintained by Andrea in his local tree [1],
but was not upstreamed due to lack of use cases where this approach would
be better than allocating a new page and copying the contents. Previous
upstrami
From: Andrea Arcangeli
For now, folio_move_anon_rmap() was only used to move a folio to a
different anon_vma after fork(), whereby the root anon_vma stayed
unchanged. For that, it was sufficient to hold the folio lock when
calling folio_move_anon_rmap().
However, we want to make use of folio_mov
On 09 Oct 10:49, Meng Li wrote:
> Introduce amd-pstate preferred core.
>
> check preferred core state set by the kernel parameter:
> $ cat /sys/devices/system/cpu/amd-pstate/prefcore
>
> Reviewed-by: Mario Limonciello
> Reviewed-by: Huang Rui
Reviewed-by: Wyes Karny
> Signed-off-by: Meng Li
>
On 09 Oct 10:49, Meng Li wrote:
> amd-pstate driver utilizes the functions and data structures
> provided by the ITMT architecture to enable the scheduler to
> favor scheduling on cores which can be get a higher frequency
> with lower voltage. We call it amd-pstate preferrred core.
>
> Here sched_
On 09 Oct 10:49, Meng Li wrote:
> ACPI 6.5 section 8.4.6.1.1.1 specifies that Notify event 0x85 can be
> emmitted to cause the the OSPM to re-evaluate the highest performance
> register. Add support for this event.
>
> Reviewed-by: Mario Limonciello
> Reviewed-by: Huang Rui
Reviewed-by: Wyes Kar
Hi Meng Li,
On 09 Oct 10:49, Meng Li wrote:
> Preferred core rankings can be changed dynamically by the
> platform based on the workload and platform conditions and
> accounting for thermals and aging.
> When this occurs, cpu priority need to be set.
>
> Reviewed-by: Mario Limonciello
> Reviewed
On 09 Oct 10:49, Meng Li wrote:
> amd-pstate driver also uses SCHED_MC_PRIO, so decouple the requirement
> of CPU_SUP_INTEL from the dependencies to allow compilation in kernels
> without Intel CPU support.
>
> Reviewed-by: Mario Limonciello
> Reviewed-by: Huang Rui
Reviewed-by: Wyes Karny
> Si
On Mon, Oct 09, 2023 at 12:13:52PM +0800, Yi Liu wrote:
> On 2023/10/7 18:08, Yan Zhao wrote:
> > On Thu, Sep 21, 2023 at 12:51:24AM -0700, Yi Liu wrote:
> > > From: Nicolin Chen
> > >
> > > The struct iommufd_hw_pagetable has been representing a kernel-managed
> > > HWPT, yet soon will be reused
On 2023/10/7 18:08, Yan Zhao wrote:
On Thu, Sep 21, 2023 at 12:51:24AM -0700, Yi Liu wrote:
From: Nicolin Chen
The struct iommufd_hw_pagetable has been representing a kernel-managed
HWPT, yet soon will be reused to represent a user-managed HWPT. These
two types of HWPTs has the same IOMMUFD ob
amd-pstate driver support enable/disable preferred core.
Default enabled on platforms supporting amd-pstate preferred core.
Disable amd-pstate preferred core with
"amd_prefcore=disable" added to the kernel command line.
Signed-off-by: Meng Li
Reviewed-by: Mario Limonciello
Reviewed-by: Wyes Karn
Introduce amd-pstate preferred core.
check preferred core state set by the kernel parameter:
$ cat /sys/devices/system/cpu/amd-pstate/prefcore
Reviewed-by: Mario Limonciello
Reviewed-by: Huang Rui
Signed-off-by: Meng Li
---
Documentation/admin-guide/pm/amd-pstate.rst | 59
ACPI 6.5 section 8.4.6.1.1.1 specifies that Notify event 0x85 can be
emmitted to cause the the OSPM to re-evaluate the highest performance
register. Add support for this event.
Reviewed-by: Mario Limonciello
Reviewed-by: Huang Rui
Signed-off-by: Meng Li
Link:
https://uefi.org/specs/ACPI/6.5/05
Preferred core rankings can be changed dynamically by the
platform based on the workload and platform conditions and
accounting for thermals and aging.
When this occurs, cpu priority need to be set.
Reviewed-by: Mario Limonciello
Reviewed-by: Wyes Karny
Reviewed-by: Huang Rui
Signed-off-by: Men
amd-pstate driver utilizes the functions and data structures
provided by the ITMT architecture to enable the scheduler to
favor scheduling on cores which can be get a higher frequency
with lower voltage. We call it amd-pstate preferrred core.
Here sched_set_itmt_core_prio() is called to set priori
Add support for getting the highest performance to the
generic CPPC driver. This enables downstream drivers
such as amd-pstate to discover and use these values.
Please refer to the ACPI_Spec for details on continuous
performance control of CPPC.
Reviewed-by: Mario Limonciello
Reviewed-by: Wyes K
amd-pstate driver also uses SCHED_MC_PRIO, so decouple the requirement
of CPU_SUP_INTEL from the dependencies to allow compilation in kernels
without Intel CPU support.
Reviewed-by: Mario Limonciello
Reviewed-by: Huang Rui
Signed-off-by: Meng Li
---
arch/x86/Kconfig | 5 +++--
1 file changed,
Hi all:
The core frequency is subjected to the process variation in semiconductors.
Not all cores are able to reach the maximum frequency respecting the
infrastructure limits. Consequently, AMD has redefined the concept of
maximum frequency of a part. This means that a fraction of cores can reach
> From: Liu, Yi L
> Sent: Thursday, September 28, 2023 3:15 PM
>
> This adds the domain_alloc_user op implementation. It supports allocating
> domains to be used as parent under nested translation.
>
> Signed-off-by: Yi Liu
Reviewed-by: Kevin Tian
> From: Liu, Yi L
> Sent: Thursday, September 28, 2023 3:15 PM
>
> This adds mock_domain_alloc_user function and also new test case for the
> new flag IOMMU_HWPT_ALLOC_NEST_PARENT.
>
> Co-developed-by: Nicolin Chen
> Signed-off-by: Nicolin Chen
> Signed-off-by: Yi Liu
Reviewed-by: Kevin Tian
> From: Liu, Yi L
> Sent: Thursday, September 28, 2023 3:15 PM
>
> This extends IOMMU_HWPT_ALLOC to allocate domains used as parent
> (stage-2)
> in nested translation.
>
> Signed-off-by: Yi Liu
Reviewed-by: Kevin Tian
> From: Liu, Yi L
> Sent: Thursday, September 28, 2023 3:15 PM
>
> Introduce a new iommu_domain op to create domains owned by userspace,
> e.g. through IOMMUFD. These domains have a few different properties
> compares to kernel owned domains:
>
> - They may be UNMANAGED domains, but created wit
On 2023/10/09 5:08, Willem de Bruijn wrote:
On Sun, Oct 8, 2023 at 10:04 PM Akihiko Odaki wrote:
On 2023/10/09 4:07, Willem de Bruijn wrote:
On Sun, Oct 8, 2023 at 7:22 AM Akihiko Odaki wrote:
virtio-net have two usage of hashes: one is RSS and another is hash
reporting. Conventionally the
On Sun, Oct 8, 2023 at 10:04 PM Akihiko Odaki wrote:
>
> On 2023/10/09 4:07, Willem de Bruijn wrote:
> > On Sun, Oct 8, 2023 at 7:22 AM Akihiko Odaki
> > wrote:
> >>
> >> virtio-net have two usage of hashes: one is RSS and another is hash
> >> reporting. Conventionally the hash calculation was d
On 2023/10/09 4:07, Willem de Bruijn wrote:
On Sun, Oct 8, 2023 at 7:22 AM Akihiko Odaki wrote:
virtio-net have two usage of hashes: one is RSS and another is hash
reporting. Conventionally the hash calculation was done by the VMM.
However, computing the hash after the queue was chosen defeats
On 2023/10/09 3:39, Willem de Bruijn wrote:
On Sun, Oct 8, 2023 at 7:22 AM Akihiko Odaki wrote:
tun_vnet_hash can use this flag to indicate it stored virtio-net hash
cache to cb.
Signed-off-by: Akihiko Odaki
---
include/linux/skbuff.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/
On Sun, Oct 8, 2023 at 7:22 AM Akihiko Odaki wrote:
>
> virtio-net have two usage of hashes: one is RSS and another is hash
> reporting. Conventionally the hash calculation was done by the VMM.
> However, computing the hash after the queue was chosen defeats the
> purpose of RSS.
>
> Another appro
On Sun, Oct 8, 2023 at 7:22 AM Akihiko Odaki wrote:
>
> tun_vnet_hash can use this flag to indicate it stored virtio-net hash
> cache to cb.
>
> Signed-off-by: Akihiko Odaki
> ---
> include/linux/skbuff.h | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/include/linux/skbuff.h b/include
On Sun, Oct 8, 2023 at 7:21 AM Akihiko Odaki wrote:
>
> virtio-net have two usage of hashes: one is RSS and another is hash
> reporting. Conventionally the hash calculation was done by the VMM.
> However, computing the hash after the queue was chosen defeats the
> purpose of RSS.
>
> Another appro
On Sun, Oct 08, 2023 at 11:30:52AM +0530, Naresh Kamboju wrote:
> While running selftests: cgroup: test_kmem on FVP following kernel crash
> noticed on Linux next 6.6.0-rc4-next-20231006.
Hi Naresh!
Thank you for the report!
I've tried to reproduce it, but wasn't successful so far: I've run test
QEMU_ARCH_loongarch = loongarch64
---
base-commit: 361fbc295e965a3c7f606d281e6107e098d33730
change-id: 20231008-nolibc-qemu-ppc64-07b4f74043a6
Best regards,
--
Thomas Weißschuh
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