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| Filename | Latest commit message | Latest commit date |
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2d1ce5ec21
When both ends of a PCIe Link are capable of a higher bandwidth than is currently in use, the Link is said to be "downtrained". A downtrained Link may indicate hardware or configuration problems in the system, but it's hard to identify such Links from userspace. Refactor pcie_print_link_status() so it continues to always print PCIe bandwidth information, as several NIC drivers desire. Add a new internal __pcie_print_link_status() to emit a message only when a device's bandwidth is constrained by the fabric and call it from the PCI core for all devices, which identifies all downtrained Links. It also emits messages for a few cases that are technically not downtrained, such as a x4 device in an open-ended x1 slot. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> [bhelgaas: changelog, move __pcie_print_link_status() declaration to drivers/pci/, rename pcie_check_upstream_link() to pcie_report_downtraining()] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> |
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.