C – Troubleshooting

Kernel and Initialization Issues

Q

C.4.1

Kernel Needs CONFIG_PCI_MSI=y

If the InfiniPath driver is being compiled on a machine without CONFIG_PCI_MSI=y configured, you will get a compilation error similar to this:

ib_ipath/ipath_driver.c:46:2: #error "InfiniPath driver can only be used with kernels with CONFIG_PCI_MSI=y"

make[3]: *** [ib_ipath/ipath_driver.o] Error 1

Some kernels, such as some versions of FC4 (2.6.16), have CONFIG_PCI_MSI=n as the default. This default may also be introduced with updates to other Linux distributions or local configuration changes. This needs to be changed to CONFIG_PCI_MSI=y in order for the InfiniPath driver to function.

The suggested remedy is to install one of the supported Linux kernels (see section 1.7), or download a patched kernel from the QLogic website.

Pre-built kernels and patches for these distributions are available for download on the website. Please go to:

http://www.qlogic.com

Follow the links to the download page.

NOTE: As of this writing, kernels later than 2.6.16-1.2108_FC4smp on FC4 no longer have this problem.

C.4.2

pci_msi_quirk

A change was made in the kernel.org 2.6.12 kernel that can cause an InfiniPath driver runtime error with the QLE7140. This change is found in most linux distributions with 2.6.12 - 2.6.16 kernels, including Fedora Core 3, Fedora Core 4, and SUSE Linux 10.0. Affected systems are those that contain the AMD8131 PCI bridge. Such systems may experience a problem with MSI (Message Signaled Interrupt) that impairs the operation of the InfiniPath QLE7140 adapter. The InfiniPath driver will not be able to configure the InfiniBand link to the Active state. If messages similar to those below are displayed on the console during boot, or are in /var/log/messages, then you probably have the problem:

PCI: MSI quirk detected. pci_msi_quirk set.

path_core 0000:03:00.0: pci_enable_msi failed: -22, interrupts may not work

Pre-built kernels and patches for these distributions are available for download on the website. Please go to:

http://www.qlogic.com

Follow the links to the downloads page.

C-8

IB6054601-00 D

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Q-Logic IB6054601-00 D manual Kernel Needs CONFIGPCIMSI=y, Pcimsiquirk
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IB6054601-00 D specifications

The Q-Logic IB6054601-00 D is a high-performance InfiniBand adapter card designed for data centers and enterprise applications requiring robust connectivity and low-latency communication. This adapter is part of QLogic's extensive portfolio of networking solutions, catering to the needs of high-performance computing (HPC), cloud computing, and virtualization environments.

One of the standout features of the IB6054601-00 D is its capability to support data transfer rates of up to 56 Gbps. This makes it ideal for applications demanding large bandwidth and quick data processing. The adapter is optimized for RDMA (Remote Direct Memory Access) technology, which allows data to be transferred directly between the memory of different computers without involving the CPU. This reduces latency and CPU overhead, leading to enhanced overall system performance.

The architecture of the IB6054601-00 D includes support for a dual-port design, which offers increased bandwidth, redundancy, and fault tolerance. This dual-port configuration is especially advantageous for environments that require high availability and reliability, such as financial services and mission-critical applications.

The adapter utilizes advanced error detection and correction mechanisms, ensuring that data integrity is maintained during transmission. With features like adaptive routing and congestion management, the IB6054601-00 D is capable of optimizing the handling of data flows, thereby enhancing performance even under heavy loads.

In terms of compatibility, the Q-Logic IB6054601-00 D supports a wide range of operating systems and virtualization technologies, making it easy to integrate into diverse IT environments. It also includes drivers and software packages that facilitate seamless deployment and management.

In addition to high-speed connectivity, the adapter is designed with power efficiency in mind. It adheres to Energy Star regulations, helping organizations lower their operational costs while minimizing their environmental footprint.

Overall, the Q-Logic IB6054601-00 D stands out for its high throughput, low latency, and reliability. Its combination of advanced features and technologies positions it as an excellent choice for organizations looking to enhance their data center performance and maximize the efficiency of their network infrastructure. With the growing demands for faster and more efficient data transfer, solutions like the IB6054601-00 D are essential in meeting the evolving needs of modern enterprises.
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