Guest halt polling can reduce the latency of waking a task on an idle vCPU.
The user should remove idle=* from kernel cmdline to put it to work.
Signed-off-by: NYihao Wu <wuyihao@linux.alibaba.com>
Acked-by: NMichael Wang <yun.wang@linux.alibaba.com>

The PM timer is availiable in case of ACPI is unusable or blacklisted.
So let's enable it as a fallback timer when APIC timer goes wrong.
Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>
Reviewed-by: NDust Li <dust.li@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

 arm64 alrealy enabled CCGROUP_BPF

Signed-off-by: dust.li <Dust Li dust.li@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>
Acked-by: NCaspar Zhang <caspar@linux.alibaba.com>

Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>

This patch enables Hygon CPU support by default.
Signed-off-by: NCaspar Zhang <caspar@linux.alibaba.com>

This is useful for getting block layer debugging information in debugfs,
also our io hang check feature depends on it.
Signed-off-by: NXiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

The deferred page init can help to improve memory initialization at boot
time.

We encountered one memory bandwidth regression in ck-release-17(v4.19.81).
Now, the fix patch for this issue has been backported in v4.19.84. so
enable it again.
Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

Change THP policy from 'madvise' to 'always' since we've found it
benefits a lot in most scenarios, e.g. pmbench.
For defrag configuration, it will be initialized to 'madvise'.
Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>
Acked-by: NCaspar Zhang <caspar@linux.alibaba.com>

Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

This reverts commit 72b9f44eb5c19325fd850c489a0968c99d4c7dbc.

This configure caused lmbench benchmark regression more than
30%, so revert it.

Test by command `bw_pipe -M 10240 -P 16` on 32c64g VM.
Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

cloud-init can use qemu_fw_cfg module to configure user password. It can
reduce 3~5s boot time.
Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>

To support intel icelake, now enable RAS features, dax pmem and icelake
related configs.
Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

Signed-off-by: NJiufei Xue <jiufei.xue@linux.alibaba.com>
Reviewed-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

Deferred struct_page init can same more boot time, especially for large
memory instance. In my local test with 2C312GB VM, it decreases from
2.389s to 0.138s.
Please note that this has a potential performance impact on processes
running early in the lifetime of the system until these kthreads finish
the initialisation.
Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

To compile as modules can make the driver init parallel with systemd
startup, which can save about 40ms startup time.
Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

PS/2 mouse device probing costs more than 600ms after mouse driver
was initialized.
To compile it as modules can make the probing parallel with
init(systemd) startup, which can save about 600ms startup time.
Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

Signed-off-by: NCaspar Zhang <caspar@linux.alibaba.com>

Turn on several configs to support icelake.
Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>
Reviewed-by: NXunlei Pang <xlpang@linux.alibaba.com>

Add CONFIG_DEV_DAX_KMEM and make some related configs as Y.
Signed-off-by: NYang Shi <yang.shi@linux.alibaba.com>
Reviewed-by: NGavin Shan <shan.gavin@linux.alibaba.com>

Signed-off-by: NCaspar Zhang <caspar@linux.alibaba.com>

The in-kernel torture test includes 2 kinds of stress test:
1. locking stress test;
   (for more info can refer to
    https://www.kernel.org/doc/Documentation/locking/locktorture.txt)
2. RCU stress test.
   (for more info can refer to
    https://www.kernel.org/doc/Documentation/RCU/torture.txt)
Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>
Reviewed-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

When in a KVM image, the user wants to use vHost_vSocks
the resource is already taken by virito_vSockets, so
set them as m to enable this use case.
Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

Signed-off-by: NCaspar Zhang <caspar@linux.alibaba.com>

1. cubic makes redis performance doubled than bbr in some case.
2. keep same default setting with RHEL8.
Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

With the VLAN filtering feature, the Linux bridge acts more like a
real switch. Administrators can control all VLANs with only one
bridge, making it more easy and efficient to set up distinct subnets
on virtualization servers.

Kubernetes cni (container network interface) takes advantages of this
feature to configure pod network.

There will be error prompt like below if BRIDGE_VLAN_FILTERING is not
set.
NetworkPlugin cni failed to set up pod "<pod-name>" network: failed to
create bridge "cni0": could not add "cni0": operation not supported.

Therefore, enable BRIDGE_VLAN_FILTERING in this commit.
Signed-off-by: NXu Yu <xuyu@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

Dpdk needs NOIOMMU mode for virtualization in Aliyun. It depends
on vfio in Alinux2.
With VFIO_NOIOMMU configured, NOIOMMU mode can be enabled by:
/sys/module/vfio/parameters/enable_unsafe_noiommu_mode. The default
is IOMMU mode.
Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>
Reviewed-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

CONFIG_BFQ_GROUP_IOSCHED is required when we need BFQ support in
cgroup-v1 and cgroup-v2.
Signed-off-by: NCaspar Zhang <caspar@linux.alibaba.com>

Enable function profiling feature of ftrace.
Signed-off-by: NJeffle Xu <jefflexu@linux.alibaba.com>
Acked-by: NCaspar Zhang <caspar@linux.alibaba.com>

Support IMA as an integrity service provider.
Signed-off-by: Nluanshi <zhangliguang@linux.alibaba.com>
Reviewed-by: Jia Zhang <zhang.jia@linux.alibaba.com>
Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>
Signed-off-by: NCaspar Zhang <caspar@linux.alibaba.com>

Support TPM Interface Specification 1.2 Interface / TPM 2.0 FIFO
Interface.
Signed-off-by: Nzou cao <zoucao@linux.alibaba.com>
Reviewed-by: Jia Zhang <zhang.jia@linux.alibaba.com>
Acked-by: NCaspar Zhang <caspar@linux.alibaba.com>

Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

These are required for blktests, and currently we only support on debug
kernel for test only.
Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

Now we have psi tracking support in kernel code, let's make it support
in kconfig.
As of now, we require a boot parameter to enable psi tracking for
performance impact concern. That means we disable it by default, and
user can pass a boot parameter "psi=1" to enable it if they want this
feature.
Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

iproute2 suite, including ss, depends on INET_DIAG.

This patch enables CONFIG_INET_DIAG and a set of
protocol specific configs depend on CONFIG_INET_DIAG,
such as CONFIG_INET_TCP_DIAG, CONFIG_INET_UDP_DIAG,
CONFIG_INET_RAW_DIAG and CONFIG_INET_SCTP_DIAG.

These configs are all set as module.
Signed-off-by: NJeffle Xu <jefflexu@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>