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The FRL can be reverted back to its default setting by setting pciPassthru0. The reservation is sufficient to support up to 32GB of system memory, and may be increased to accommodate up to 64GB by adding the configuration parameter pciPassthru0.

To accommodate system memory larger than 64GB, the reservation can be further increased by adding pciPassthru0. We recommend adding 2 M of reservation for each additional 1 GB of system memory. The reservation can be reverted back to its default setting by setting pciPassthru0. Only resolved issues that have been previously noted as known issues or had a noticeable user impact are listed. No resolved issues are reported in this release for VMware vSphere.

When this issue occurs, error messages that indicate that the Virtual GPU Manager process crashed are written to the log file vmware. Applications running in a VM request memory to be allocated and freed by the vGPU manager plugin, which runs on the hypervisor host. When an application requests the vGPU manager plugin to free previously allocated memory, some of the memory is not freed. Some applications request memory more frequently than other applications.

If such applications run for a long period of time, for example for two or more days, the failure to free all allocated memory might cause the hypervisor host to run out of memory. As a result, memory allocation for applications running in the VM might fail, causing the applications and, sometimes, the VM to hang. As a result, the validation check in the service fails, which causes the client to fail to acquire a license.

This issue occurs because starting with Windows Server , the required codecs are not included with the OS and are not available through the Microsoft Store app. As a result, hardware decoding is not available for viewing YouTube videos or using collaboration tools such as Google Meet in a web browser. If an application or a VM hangs after a long period of usage, restart the VM every couple of days to prevent the hypervisor host from running out of memory.

If you encounter this issue after the VM is configured, use one of the following workarounds:. After the session freezes, the VM must be rebooted to recover the session. These mappings depend on the number and type of applications running in the VM. To employ this workaround, set the vGPU plugin parameter pciPassthru0. Only VMware vCenter Server 7. Upgrade VMware vCenter Server to release 7. Only the reported frame rate is incorrect.

The actual encoding of frames is not affected. When this issue occurs, XID error 31 is written to the log files on the destination hypervisor host. This issue affects migration from a host that is running a vGPU manager 11 release before Upgrade the host that is running a vGPU manager 11 release to release When this issue occurs, the following messages are written to the log file on the hypervisor host:.

This issue is resolved in the latest For more information, refer to the documentation for the version of VMware Horizon that you are using:. The address must be specified exactly as it is specified in the client's license server settings either as a fully-qualified domain name or an IP address. Ensure that sufficient frame buffer is available for all the virtual displays that are connected to a vGPU by changing the configuration in one of the following ways:.

After the migration, the destination host and VM become unstable. Depending on the host configurations, the following messages might also be written to the log file:. After a Teradici Cloud Access Software session has been idle for a short period of time, the session disconnects from the VM. This issue affects only Linux guest VMs.

This issue is caused by the omission of version information for the vGPU manager from the configuration information that GPU Operator requires.

This issue occurs if the driver is upgraded by overinstalling the new release of the driver on the current release of the driver while the nvidia-gridd service is running in the VM. When a window is dragged across the desktop in a Citrix Virtual Apps and Desktops session, corruption of the session in the form of residual window borders occurs. This issue affects only Citrix Virtual Apps and Desktops version 7 When this issue occurs, the VM becomes unusable and clients cannot connect to the VM even if only a single display is connected to it.

When this issue occurs, the error One or more devices pciPassthru0 required by VM vm-name are not available on host host-name is reported on VMware vCenter Server. Unable to allocate video memory.

Only some applications are affected, for example, glxgears. Other applications, such as Unigine Heaven, are not affected. This behavior occurs because Display Power Management Signaling DPMS for the Xorg server is enabled by default and the display is detected to be inactive even when the application is running.

When DPMS is enabled, it enables power saving behavior of the display after several minutes of inactivity by setting the frame rate to 1 FPS. When VMware Horizon is used with the Blast Extreme display protocol, frame buffer consumption increases over time after multiple disconnections from and reconnections to a VM.

This issue occurs even if the VM is in an idle state and no graphics applications are running. Computer Management shows problems with the primary display device. After multiple VMs configured with vGPU on a single hypervisor host are migrated simultaneously, the remote desktop session freezes with an assertion failure and XID error It does not occur if only a single VM is migrated. The rebuild of the driver fails because the compiler version is incorrect.

Any attempt to reinstall the driver fails because the kernel fails to build. Stop and restart the Xorg service and nv-hostengine on the ESXi host. Wait for 1 second to allow nv-hostengine to stop.

When vMotion is used to migrate a VM configured with vGPU to another host, users' sessions may freeze for up to several seconds during the migration. Administrators can mitigate the effects on end users by avoiding migration of VMs configured with vGPU during business hours or warning end users that migration is about to start and that they may experience session freezes. End users experiencing this issue must wait for their sessions to resume when the migration is complete.

When a VM configured with vGPU is migrated to another host, the migration stops before it is complete. After the migration stops, the VM is no longer accessible. This issue occurs if the ECC memory configuration enabled or disabled on the source and destination hosts are different. The ECC memory configuration on both the source and destination hosts must be identical. Reboot the hypervisor host to recover the VM. Before attempting to migrate the VM again, ensure that the ECC memory configuration on both the source and destination hosts are identical.

Even with this patch, migration of a VM configured with vGPU requires the ECC memory configuration on both the source and destination hosts to be identical. When a VMware Horizon session with Windows 7 is connected to four displays, a black screen is observed on one or more displays.

This issue occurs because a VMware Horizon session does not support connections to four 4K displays with Windows 7. For example, host CPU utilization when only a small number of VMs are running is as high as when several times as many VMs are running.

Because of a known limitation with NvFBC, a frame capture while the interactive logon message is displayed returns a blank screen. An NvFBC session can capture screen updates that occur after the session is created.

Before the logon message appears, there is no screen update after the message is shown and, therefore, a black screen is returned instead. This default setting enables 2D DirectX applications such as Microsoft Office to use software rendering, which can be more efficient than using the GPU for rendering. Change the local computer policy to use the hardware graphics adapter for all RDS sessions.

Set the Use the hardware default graphics adapter for all Remote Desktop Services sessions option. The error stack in the task details on the vSphere web client contains the following error message:. Increase the maximum switchover time by increasing the vmotion. This behavior is a result of the mechanism that is used to measure GPU engine utilization. The command nvidia-smi vgpu -m shows that vGPU migration is supported on all hypervisors, even hypervisors or hypervisor versions that do not support vGPU migration.

Depending on the combination of options set, one of the following error messages is seen when the VM is powered on:. This message is seen when the following options are set:. When nvidia-smi is run without any arguments to verify the installation, the following error message is displayed:.

In some situations, after the VM is powered on, the guest OS crashes or fails to boot. When windows for 3D applications on Linux are dragged, the frame rate drops substantially and the application runs slowly. On Red Hat Enterprise Linux 6. Disabling the GUI for licensing resolves this issue. To prevent this issue, the GUI for licensing is disabled by default. In environments where non-persistent licensed VMs are not cleanly shut down, licenses on the license server can become exhausted.

For example, this issue can occur in automated test environments where VMs are frequently changing and are not guaranteed to be cleanly shut down. The licenses from such VMs remain checked out against their MAC address for seven days before they time out and become available to other VMs. If VMs are routinely being powered off without clean shutdown in your environment, you can avoid this issue by shortening the license borrow period. To shorten the license borrow period, set the LicenseInterval configuration setting in your VM image.

Memory exhaustion can occur with vGPU profiles that have Mbytes or less of frame buffer. The root cause is a known issue associated with changes to the way that recent Microsoft operating systems handle and allow access to overprovisioning messages and errors. If your systems are provisioned with enough frame buffer to support your use cases, you should not encounter these issues. Additionally, you can use the VMware OS Optimization Tool to make and apply optimization recommendations for Windows 10 and other operating systems.

If you do not change the default graphics type you will encounter this issue. When memory usage is monitored from inside the VM, no memory usage alarm is shown. For VMware vSphere releases before 6. Any attempt to install the driver on a VM on a host in an automated DRS cluster fails with the following error:.

Ensure that the automation level of the DRS cluster is set to Manual. Click Apply to accept the configuration. The additional vGPU devices are present in Windows Device Manager but display a warning sign, and the following device status:. This is not a currently supported configuration for vGPU.

If multiple VMs are started simultaneously, vSphere may not adhere to the placement policy currently in effect.

Sleep is not supported on vGPU and attempts to use it will lead to undefined behavior. Installing the VMware Horizon agent will disable the Sleep option. For example, on a server configured with G of memory, these errors may occur if vGPU-enabled VMs are assigned more than G of memory. Reduce the total amount of system memory assigned to the VMs. On a system running a maximal configuration, that is, with the maximum number of vGPU VMs the server can support, some VMs might fail to start post a reset or restart operation.

The GPU utilization remains high for the duration of the Horizon session even if there are no active applications running on the VM. This document is provided for information purposes only and shall not be regarded as a warranty of a certain functionality, condition, or quality of a product. NVIDIA shall have no liability for the consequences or use of such information or for any infringement of patents or other rights of third parties that may result from its use.

This document is not a commitment to develop, release, or deliver any Material defined below , code, or functionality. NVIDIA reserves the right to make corrections, modifications, enhancements, improvements, and any other changes to this document, at any time without notice. Additionally, there can be multiple cgroups hierarchies, exposing different APIs.

The main two that are relevant in this case are:. The kernel cgroups v2 is now supported in unified mode. However, the default is still hybrid mode. See the kernel documentation for more information about cgroups.

The settings of kernel-preempt support timely reaction to external events and precise timing at the cost of overall system throughput. The specialized kernel-preempt package has been consequently removed from the distribution. For more information see the relevant kernel commit and the kernel documentation on boot interrupts.

However, the kernel did not support decompressing a zstd -compressed initramfs image before. The feature has now been enabled in the kernel but the default compression of dracut is still xz for now. In addition to the firmware files being compressed, the packaging scheme has also been changed. Previously, all firmware files were shipped in the kernel-firmware package. Now, the files are split into sub-packages, and the kernel-firmware-all package will pull all the sub-packages into the system using the kernel-firmware provides symbol.

This is because it introduced a new kind of binary compatibility check, which is currently not compatible with the kernel in 15 SP4. It may also prevent loading modules in unexpected ways. This way there will be no BTF information on the modules but the Compile-Once-Run-Everywhere feature is still available to BPF programs that only trace kernel functions found within vmlinux.

In previous SLES versions, the Btrfs file system implementation could not work with file systems formatted with a block size smaller than the configured kernel page size. That means a file system formatted with 4-kilobyte block size could be mounted by the kernel using 4-kilobyte page size but not on another system that uses kilobyte pages.

Starting with SLES 15 SP4, kernel with kilobyte page size can use Btrfs file systems formatted with the smaller block size smaller than the kernel page size. The exisiting packages libbpf , bcc , and bpftrace have been updated and a new package cereal , the build-time dependency of bpftrace has been added.

To reduce the attack surface, its usage has been restricted to privileged users only. Privileged users include root. Value of 0 means "unprivileged enable", and value of 2 means "only privileged users enabled". However, you can explicitly request mmaps up to TiB.

With QEMU 6. Sharing address spaces of processes with devices makes it possible to rely on core kernel memory management for DMA, removing some complexity from application and device drivers. After binding to a device, applications can instruct it to perform DMA on buffers obtained with malloc. SVA mostly aims at simplifying DMA management but also improves security by isolating address spaces in devices. Outputting the driver version when using modinfo has been removed upstream.

This has been done mainly because drivers developed as part of the Linux kernel tree are already versioned along with the kernel, and having a separate version was optional and confusing. This meant that tools such as systemd generators could not know which LUKS device to activate to make a filesystem appear, unless all volumes were set up at boot. The adcli command now supports the --dont-expire-password parameter.

By default adcli will set this flag while joining the domain which corresponds to the default behavior of Windows clients. Unlike with the key option, the server and client do not need to share a key in a key file. This conflicted with the increasing demand for minimal product footprint, especially for products that were targeted for edge and embedded use cases. This new version also obsoletes the previously separate plugins zypper-migration-plugin and zypper-search-packages-plugin , which have been removed.

Abbreviated options not mentioned in --help are not supported. Previously, some abbreviated options worked due to the way Ruby parses options but they were not officially supported nor documented.

On system start-up, the graphics console is first serviced by the framebuffer drivers. In some scenarios, the handover can fail and the system graphics console can appear frozen.

To use the new graphics driver, simpledrm , the module has to be loaded during boot. As root, on the console, type:. To avoid this, simply remove the file. This can be done from within the GRUB boot menu. There should be no difference from regular boot. Everything should look as before. To verify that the simpledrm driver has been used, in the console type:. The former parameter enables simpledrm and the latter disables the native driver.

Afterwards, all the graphic output will be done by simpledrm. Finding the right console for the jeos-firstboot wizard can be tricky for the user and nothing was in place before to introduce the jeos-firstboot wizard to the user. It adds a welcome screen to greet the user and tell them about which distribution is about to be started and configured. It shows the welcome screen on all the consoles. This solves the issue where the user might not know which console needs to be used for the jeos-firstboot wizard.

It had previously been available only as a technical preview. With Samba 4. We therefore deprecated SMB1 for a possible future update of Samba. This affects the Samba file server, its libraries and clients, as well as the kernel CIFS client cifs. This version of the protocol is insecure and usage of version 2.

NIS netgroups support has been deprecated. It was removed upstream in Samba 4. NFSv4 with IPv6 is only supported for the client side. This artificial increase has been dropped in 15 SP4. Networks and storage are now faster and having a large amount of reads in flight is usually not beneficial anymore.

However, the reduced readahead size can result in worse performance in case of multiple parallel sequential IO streams on slow networks or with slow workloads. The TLS 1.

TLS 1. We recommend no longer using TLS 1. However, not all packages, for example, Python, are TLS 1. The OpenSSL 3 library is currently not used by system applications but can be used by third-party libraries and applications already. It can be used in processes together with the 1. It is frequently needed when doing work for the United States federal government. Since Linux kernel 5.

However previously, the installer did not consider all the scenarios and thus might not have set the flag correctly. NVMe-oF suffers from a well-known discovery problem that fundamentally limits the size of realistic deployments. Previously, file systems that supported fstrim were always trimmed if the device supported the TRIM command. In 15 SP4, the X-fstrim. While the file system will work and be supported until the date mentioned, it is best to re-create the file system:.

SUSE Linux Enterprise was the first enterprise Linux distribution to support journaling file systems and logical volume managers in Later, we introduced XFS to Linux, which allows for reliable large-scale file systems, systems with heavy load, and multiple parallel reading and writing operations. With SUSE Linux Enterprise 12, we started using the copy-on-write file system Btrfs as the default for the operating system, to support system snapshots and rollback.

Instead of journaling changes before writing them in-place, it writes them to a new location and then links the new location in. Until the last write, the changes are not "committed". Because of the nature of the file system, quotas are implemented based on subvolumes qgroups.

The numbers in the table above assume that the file systems are using a 4 KiB block size which is the most common standard. When using different block sizes, the results are different. By default, the file system drivers in SUSE Linux Enterprise Server 15 SP4 will refuse mounting file systems that use unsupported features in particular, in read-write mode.

However, note that setting this option will render your kernel and thus your system unsupported. Section 6. Find a summary of changes below. It also supports enrolling "recovery keys" and regular passphrases. A new credentials logic has been added to system services. This is a simple mechanism to pass privileged data to services in a safe and secure way.

A concept of system extension images is introduced. A new systemd-sysext tool can be used to merge, un-merge, list, and refresh system extension hierarchies.

This allows debug logs to be enabled for select events, for example, just for a specific subsystem or even a single device. A warning is emitted during build. Systems with the legacy cgroup v1 hierarchy are now marked as "tainted", to make it clearer that using the legacy hierarchy is not recommended.

PCI hotplug slot names on s systems are now parsed as hexadecimal numbers. They were incorrectly parsed as decimal previously, or ignored if the name was not a valid decimal number. PCI onboard indices up to are allowed. Previously, numbers above were rejected. This primarily impacts s systems, where values up to are used. Kernel API incompatibility: Linux 4. The introduction of these new uevents which are typically generated for USB devices and devices needing a firmware upload before being functional resulted in a number of issues.

To minimize issues resulting from this kernel change starting with systemd-udevd , the udev tags concept which is a concept for marking and filtering devices during enumeration and monitoring has been reworked: udev tags are now "sticky", meaning that once a tag is assigned to a device it will not be removed from the device again until the device itself is removed that is, unplugged.

However, there are AutoYaST modules, which are only available in some products. Now there are different versions of the yast2-schema package, which only include the modules relevant for the particular product. YaST now makes it possible to select from several different visual themes. This includes a dark or a high-contrast mode, and several others. This is required, for example, for running rootless containers. Previously, it was possible to set a group password in YaST. However, group passwords are an inherent security problem.

Thus this features has been removed from both the user interface and AutoYaST. Those elements are also ignored when importing a group from an existing AutoYaST profile. The installer proposes hibernation including adding the resume kernel option only if these conditions are met:.

Support for System V init. To prepare for this change, use the automatically generated systemd service files directly instead of using System V init. To then control the associated services, use systemctl. The automatic conversion provided by systemd specifically, systemd-sysv-generator is only meant to ensure backward compatibility with System V init.

To take full advantage of systemd features, it can be beneficial to manually rewrite the service files. Use systemd service files instead. This command contacts the SCC and searches all modules for matching packages. This functionality makes it easier for administrators and system architects to find the software packages needed.

These release notes only document changes in virtualization support compared to the immediate previous service pack of SUSE Linux Enterprise Server. Support for native graphical installer has been added if virtio-gpu is used.

The main use case is preventing access by third parties to data hosted in a public cloud. With this change, the upstream communities now define metadata that describe the firmware. This allows firmware to be automatically selected based on user-friendly configuration. For example, the user can now simply specify EFI and the appropriate firmware will be selected. Xen has been updated to version 4. This change reduces the attack surface in the hypervisor. Note both projects have upstream Xen support merged now, so it is no longer recommended to use the Xen specific forks.

QEMU has been updated to version 6. In previous versions, if no explicit image format was provided, some QEMU tools tried to guess the format of the image, and then process it accordingly. Because this feature is a potential source of security issues, it has been deprecated and removed. It is now necessary to explicitly specify the image format.

Enforcing good behavior and preventing both known and unknown security flaws from being exploited is highly recommended in the Linux world. This allows a user to configure AppArmor policies at will right after the first boot of our Minimal-VM images. KubeVirt is a technology which enables container-native virtualization. It is now possible to prefer UEFI when creating new virtual machines. Some of the changes in this version are the following:. Remove clashing -r command line shortcut for resize that clashed with existing reconnect shortcut.

The respective packages are libpulp0 , the live patching core that must be pre-loaded into the application on start, and libpulp-tools containing the essential tools for building and deployment of patches. Next, there are containers for the future live patches called glibc-livepatches and openssl-livepatches that will receive the fixes through future maintenance updates. However, new features and performance counters are not supported and the use of idle states might not be optimal.

PowerVM LPAR guest secure boot with static keys with verification to extend the chain of trust from partition firmware to the OS kernel and includes key management. KMIP provides a standard protocol for managing keys over the network to automate many key management tasks. This software can also create a virtual machine from a physical PC. From Wikipedia, the free encyclopedia. VMware Player running Ubuntu Retrieved VMware Player home page. Retrieved 9 September Archived from the original on Retrieved 27 April February Virtualization software.

Comparison of platform virtualization software. Docker lmctfy rkt. Rump kernel User-mode Linux vkernel. BrandZ cgroups chroot namespaces seccomp. Categories : VMware Virtualization software Proprietary cross-platform software. Hidden categories: CS1 maint: archived copy as title Official website different in Wikidata and Wikipedia. Namespaces Article Talk. Views Read Edit View history.