Updated GSG of using RT Linux as RTVM in accordance with acrn-kernel v4.19.28
Signed-off-by: Li, Wilson <wilson.li@intel.com>
This commit is contained in:
Li, Wilson
David Kinder
parent
ee4e46cd07
commit
e8242a797b
|
|
@ -0,0 +1,35 @@
|
|||
diff --git a/mm/swap.c b/mm/swap.c
|
||||
index 26fc9b5..d5067e5 100644
|
||||
--- a/mm/swap.c
|
||||
+++ b/mm/swap.c
|
||||
@@ -654,13 +654,15 @@ void lru_add_drain(void)
|
||||
put_cpu();
|
||||
}
|
||||
|
||||
+#ifdef CONFIG_SMP
|
||||
+
|
||||
+static DEFINE_PER_CPU(struct work_struct, lru_add_drain_work);
|
||||
+
|
||||
static void lru_add_drain_per_cpu(struct work_struct *dummy)
|
||||
{
|
||||
lru_add_drain();
|
||||
}
|
||||
|
||||
-static DEFINE_PER_CPU(struct work_struct, lru_add_drain_work);
|
||||
-
|
||||
/*
|
||||
* Doesn't need any cpu hotplug locking because we do rely on per-cpu
|
||||
* kworkers being shut down before our page_alloc_cpu_dead callback is
|
||||
@@ -703,6 +705,12 @@ void lru_add_drain_all(void)
|
||||
|
||||
mutex_unlock(&lock);
|
||||
}
|
||||
+#else
|
||||
+void lru_add_drain_all(void)
|
||||
+{
|
||||
+ lru_add_drain();
|
||||
+}
|
||||
+#endif
|
||||
|
||||
/**
|
||||
* release_pages - batched put_page()
|
||||
|
|
@ -5,7 +5,7 @@ Using PREEMPT_RT-Linux for real-time UOS
|
|||
|
||||
The ACRN project uses various techniques to support a User OS (UOS)
|
||||
running as virtual machine (VM) with real-time characteristics, also
|
||||
called a "Privileged VM" in ACRN terminology. Some of these techniques
|
||||
called a "RTVM" in ACRN terminology. Some of these techniques
|
||||
include device passthrough and cache allocation technology (CAT), as
|
||||
shown in :numref:`rt-linux-arch`.
|
||||
|
||||
|
|
@ -28,9 +28,9 @@ event such as an interrupt within a defined time frame.
|
|||
|
||||
Real-Time Linux (PREEMPT_RT) VM on ACRN
|
||||
|
||||
The privileged VM exclusively owns its passthrough devices, so in
|
||||
The RTVM exclusively owns its passthrough devices, so in
|
||||
addition to the controller and file system used by the SOS, a dedicated
|
||||
storage controller and device are needed to host the privileged VM's
|
||||
storage controller and device are needed to host the RTVM's
|
||||
root filesystem. The two storage devices should be under different PCI
|
||||
controllers because the system can only pass through PCI-based devices
|
||||
to a guest OS. The Intel NUC7ixDNHE NUC (KBL) is a good platform to set
|
||||
|
|
@ -53,17 +53,16 @@ system on Intel KBL NUC with a SATA SSD as ``/dev/sda`` and an NVME SSD as
|
|||
|
||||
a. Download Linux kernel real-time patch::
|
||||
|
||||
$ wget https://mirrors.edge.kernel.org/pub/linux/kernel/projects/rt/4.19/patch-4.19.15-rt12.patch.xz
|
||||
$ wget https://mirrors.edge.kernel.org/pub/linux/kernel/projects/rt/4.19/patch-4.19.31-rt18.patch.xz
|
||||
|
||||
#. Sync the kernel code to acrn-2019w04.5-150000p::
|
||||
#. Sync the kernel code to acrn-2019w17.4-160000p::
|
||||
|
||||
$ git clone https://github.com/projectacrn/acrn-kernel.git
|
||||
$ git checkout acrn-2019w04.5-150000p
|
||||
$ git checkout acrn-2019w17.4-160000p
|
||||
$ cd acrn-kernel
|
||||
$ xzcat ../patch-4.19.15-rt12.patch.xz | patch -p1
|
||||
|
||||
.. note:: This patch will report one conflict with ``base.c`` that
|
||||
you can ignore.
|
||||
$ wget https://raw.githubusercontent.com/projectacrn/acrn-hypervisor/master/doc/tutorials/rt_linux.patch
|
||||
$ git apply rt_linux.patch
|
||||
$ xzcat ../patch-4.19.31-rt18.patch.xz | patch -p1
|
||||
|
||||
#. Edit the ``kernel_config_uos`` config file: search for the keyword
|
||||
"NVME Support", delete ``# CONFIG_BLK_DEV_NVME is not set`` and add two lines under "NVME Support" to enable
|
||||
|
|
@ -82,7 +81,7 @@ system on Intel KBL NUC with a SATA SSD as ``/dev/sda`` and an NVME SSD as
|
|||
|
||||
#. Copy the generated package to SOS::
|
||||
|
||||
$ scp linux-4.19.8-rt6+-x86.tar.gz <user name>@<SOS ip>:~/
|
||||
$ scp linux-4.19.28-rt18-quilt-2e5dc0ac-dirty-x86.tar.gz <user name>@<SOS ip>:~/
|
||||
|
||||
#. Configure the system on SOS
|
||||
|
||||
|
|
@ -90,12 +89,12 @@ system on Intel KBL NUC with a SATA SSD as ``/dev/sda`` and an NVME SSD as
|
|||
a. Extract kernel boot and lib modules from the package::
|
||||
|
||||
$ cd ~/
|
||||
$ tar xzvf linux-4.19.8-rt6+-x86.tar.gz
|
||||
$ tar xzvf linux-4.19.28-rt18-quilt-2e5dc0ac-dirty-x86.tar.gz
|
||||
|
||||
#. Copy the extracted lib modules to NVME SSD::
|
||||
|
||||
$ mount /dev/nvme0n1p3 /mnt
|
||||
$ cp -r ~/lib/modules/4.19.8-rt6+ /mnt/lib/modules
|
||||
$ cp -r ~/lib/modules/4.19.28-rt18-quilt-2e5dc0ac-dirty /mnt/lib/modules
|
||||
|
||||
#. Edit and run the ``launch_hard_rt_vm.sh`` script to launch the UOS.
|
||||
A sample ``launch_hard_rt_vm.sh`` is included in the Clear Linux
|
||||
|
|
@ -104,7 +103,7 @@ system on Intel KBL NUC with a SATA SSD as ``/dev/sda`` and an NVME SSD as
|
|||
|
||||
You'll need to modify two places:
|
||||
|
||||
1. Replace ``/root/rt_uos_kernel`` with ``~/boot/vmlinuz-4.19.8-rt6+``
|
||||
1. Replace ``/root/rt_uos_kernel`` with ``~/boot/vmlinuz-4.19.28-rt18-quilt-2e5dc0ac-dirty``
|
||||
#. Replace ``root=/dev/sda3`` with ``root=/dev/nvme0n1p3``
|
||||
|
||||
#. Run the launch script::
|
||||
|
|
|
|||
Loading…
Reference in New Issue